{"id":568,"date":"2025-03-24T08:53:14","date_gmt":"2025-03-23T23:53:14","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=568"},"modified":"2025-03-24T08:53:14","modified_gmt":"2025-03-23T23:53:14","slug":"%e3%80%902024%e5%b9%b4%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91junit%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%ef%bc%81%e5%88%9d%e5%bf%83%e8%80%85%e3%81%a7","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=568","title":{"rendered":"\u30102024\u5e74\u4fdd\u5b58\u7248\u3011JUnit\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30de\u30b9\u30bf\u30fc\uff01\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u5c0e\u5165\u304b\u3089\u5b9f\u8df5\u307e\u3067"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">JUnit\u3068\u306f\uff1f\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u306e\u7b2c\u4e00\u6b69<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">Java\u3067\u6700\u3082\u4f7f\u308f\u308c\u3066\u3044\u308b\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u306a\u305cJUnit\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u306e\u304b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">JUnit\u74b0\u5883\u69cb\u7bc9\u306e\u624b\u9806<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">Maven\/Gradle\u3067\u306e\u4f9d\u5b58\u95a2\u4fc2\u306e\u8ffd\u52a0\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">IDE\u3067\u306eJUnit\u8a2d\u5b9a\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">JUnit\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306e\u4f5c\u6210\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-8\">@Test\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">JUnit\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">@BeforeEach\u3068@AfterEach\u306e\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">@BeforeAll\u3068@AfterAll\u306e\u6d3b\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u5b9f\u8df5\u7684\u306aJUnit\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30e2\u30c3\u30af\u3092\u4f7f\u3063\u305f\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">JUnit\u30c6\u30b9\u30c8\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u547d\u540d\u898f\u5247<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027\u3092\u4fdd\u3064\u30b3\u30c4<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u306e\u8003\u3048\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-21\">\u3088\u304f\u3042\u308bJUnit\u306e\u30a8\u30e9\u30fc\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-22\">\u30c6\u30b9\u30c8\u5b9f\u884c\u6642\u306e\u4e3b\u306a\u30a8\u30e9\u30fc\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30c7\u30d0\u30c3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">JUnit\u3067\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u3092\u59cb\u3081\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-26\">\u5b9f\u8df5\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-27\">\u307e\u3068\u3081\uff1aJUnit\u3067\u5b9f\u73fe\u3059\u308b\u9ad8\u54c1\u8cea\u306aJava\u30c6\u30b9\u30c8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-28\">\u8a18\u4e8b\u306e\u8981\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-29\">\u5b9f\u8df5\u306b\u5411\u3051\u305f\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-30\">\u4eca\u5f8c\u306e\u767a\u5c55\u306b\u5411\u3051\u3066<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">JUnit\u3068\u306f\uff1f\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u306e\u7b2c\u4e00\u6b69<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">Java\u3067\u6700\u3082\u4f7f\u308f\u308c\u3066\u3044\u308b\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/h3>\n\n\n\n<p>JUnit\u306f\u3001Java\u8a00\u8a9e\u306e\u305f\u3081\u306e\u6700\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u30022024\u5e74\u73fe\u5728\u3001JUnit 5\uff08\u6b63\u5f0f\u540d\u79f0\uff1aJUnit Jupiter\uff09\u304c\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u3057\u3066\u4e3b\u6d41\u3068\u306a\u3063\u3066\u304a\u308a\u3001\u30e2\u30c0\u30f3\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u306f\u6b20\u304b\u305b\u306a\u3044\u30c4\u30fc\u30eb\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">JUnit\u306e\u4e3b\u306a\u7279\u5fb4\uff1a<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\">\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u6587<\/strong>: \u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u30d9\u30fc\u30b9\u306e\u76f4\u611f\u7684\u306aAPI<\/li>\n\n\n\n<li><strong>\u8c4a\u5bcc\u306a\u691c\u8a3c\u30e1\u30bd\u30c3\u30c9<\/strong>: \u69d8\u3005\u306a\u6bd4\u8f03\u3084\u691c\u8a3c\u306b\u5bfe\u5fdc\u3059\u308b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9<\/li>\n\n\n\n<li><strong>\u67d4\u8edf\u306a\u30c6\u30b9\u30c8\u5b9f\u884c<\/strong>: \u4e26\u5217\u5b9f\u884c\u3084\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u6a5f\u80fd<\/li>\n\n\n\n<li><strong>\u512a\u308c\u305f\u958b\u767a\u30c4\u30fc\u30eb\u9023\u643a<\/strong>: Eclipse\u3001IntelliJ IDEA\u306a\u3069\u4e3b\u8981\u306aIDE\u3068\u306e\u5b8c\u74a7\u306a\u7d71\u5408<\/li>\n\n\n\n<li><strong>\u62e1\u5f35\u6027<\/strong>: \u30e2\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306a\u3069\u4ed6\u306e\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a\u304c\u5bb9\u6613<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u5b9f\u969b\u306eJUnit\u30c6\u30b9\u30c8\u306e\u57fa\u672c\u7684\u306a\u5f62\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.junit.jupiter.api.Test;\nimport static org.junit.jupiter.api.Assertions.*;\n\npublic class CalculatorTest {\n    @Test\n    void additionTest() {\n        Calculator calc = new Calculator();\n        assertEquals(4, calc.add(2, 2), \"2 + 2 should equal 4\");\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u306a\u305cJUnit\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u306e\u304b<\/h3>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">JUnit\u3092\u4f7f\u7528\u3059\u308b\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8\uff1a<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ol class=\"wp-block-list\">\n<li><strong>\u54c1\u8cea\u306e\u5411\u4e0a<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b<\/li>\n\n\n\n<li>\u30ea\u30b0\u30ec\u30c3\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u306e\u81ea\u52d5\u5316<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u4fe1\u983c\u6027\u5411\u4e0a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u958b\u767a\u52b9\u7387\u306e\u6539\u5584<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u624b\u52d5\u30c6\u30b9\u30c8\u306e\u5de5\u6570\u524a\u6e1b<\/li>\n\n\n\n<li>\u7d99\u7d9a\u7684\u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\uff08CI\uff09\u3068\u306e\u89aa\u548c\u6027<\/li>\n\n\n\n<li>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u5b89\u5168\u6027\u78ba\u4fdd<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u3057\u3066\u306e\u4fa1\u5024<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u304c\u4ed5\u69d8\u66f8\u3068\u3057\u3066\u6a5f\u80fd<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u4f7f\u7528\u4f8b\u306e\u63d0\u4f9b<\/li>\n\n\n\n<li>\u65b0\u898f\u30e1\u30f3\u30d0\u30fc\u306e\u5b66\u7fd2\u88dc\u52a9<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8a2d\u8a08\u54c1\u8cea\u306e\u5411\u4e0a<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u306e\u4fc3\u9032<\/li>\n\n\n\n<li>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4f7f\u3044\u3084\u3059\u3055\u306e\u5411\u4e0a<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001JUnit\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u5f97\u3089\u308c\u308b\u5177\u4f53\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u793a\u3059\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u304c\u4ed5\u69d8\u66f8\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u4f8b\n@Test\nvoid transferMoney_SufficientBalance_Success() {\n    \/\/ Given: \u5341\u5206\u306a\u6b8b\u9ad8\u304c\u3042\u308b\u72b6\u614b\n    Account sourceAccount = new Account(\"John\", 1000.0);\n    Account targetAccount = new Account(\"Alice\", 500.0);\n\n    \/\/ When: 500\u5186\u3092\u9001\u91d1\u3059\u308b\n    boolean result = sourceAccount.transfer(targetAccount, 500.0);\n\n    \/\/ Then: \u9001\u91d1\u304c\u6210\u529f\u3057\u3001\u6b8b\u9ad8\u304c\u6b63\u3057\u304f\u66f4\u65b0\u3055\u308c\u308b\n    assertTrue(result);\n    assertEquals(500.0, sourceAccount.getBalance());\n    assertEquals(1000.0, targetAccount.getBalance());\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001JUnit\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u4fdd\u3061\u306a\u304c\u3089\u3001\u52b9\u7387\u7684\u306a\u958b\u767a\u3092\u9032\u3081\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30a2\u30b8\u30e3\u30a4\u30eb\u958b\u767a\u3084\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\uff08TDD\uff09\u3092\u5b9f\u8df5\u3059\u308b\u969b\u306b\u306f\u3001JUnit\u306f\u5fc5\u9808\u306e\u30c4\u30fc\u30eb\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306bJUnit\u3092\u4f7f\u3044\u59cb\u3081\u308b\u305f\u3081\u306e\u74b0\u5883\u69cb\u7bc9\u624b\u9806\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">JUnit\u74b0\u5883\u69cb\u7bc9\u306e\u624b\u9806<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">Maven\/Gradle\u3067\u306e\u4f9d\u5b58\u95a2\u4fc2\u306e\u8ffd\u52a0\u65b9\u6cd5<\/h3>\n\n\n\n<p>JUnit 5\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u74b0\u5883\u69cb\u7bc9\u306f\u3001\u4e3b\u306b\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\u306e\u8a2d\u5b9a\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002\u6700\u3082\u4e00\u822c\u7684\u306a2\u3064\u306e\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\u3067\u3042\u308bMaven\u3068Gradle\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>Maven\u3067\u306e\u8a2d\u5b9a<\/strong><\/p>\n\n\n\n<p><code>pom.xml<\/code>\u306b\u4ee5\u4e0b\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;dependencies&gt;\n    &lt;!-- JUnit Jupiter API --&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.junit.jupiter&lt;\/groupId&gt;\n        &lt;artifactId&gt;junit-jupiter-api&lt;\/artifactId&gt;\n        &lt;version&gt;5.10.1&lt;\/version&gt;\n        &lt;scope&gt;test&lt;\/scope&gt;\n    &lt;\/dependency&gt;\n\n    &lt;!-- JUnit Jupiter Engine --&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.junit.jupiter&lt;\/groupId&gt;\n        &lt;artifactId&gt;junit-jupiter-engine&lt;\/artifactId&gt;\n        &lt;version&gt;5.10.1&lt;\/version&gt;\n        &lt;scope&gt;test&lt;\/scope&gt;\n    &lt;\/dependency&gt;\n\n    &lt;!-- JUnit Jupiter Params\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u7528\uff09 --&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.junit.jupiter&lt;\/groupId&gt;\n        &lt;artifactId&gt;junit-jupiter-params&lt;\/artifactId&gt;\n        &lt;version&gt;5.10.1&lt;\/version&gt;\n        &lt;scope&gt;test&lt;\/scope&gt;\n    &lt;\/dependency&gt;\n&lt;\/dependencies&gt;\n\n&lt;build&gt;\n    &lt;plugins&gt;\n        &lt;plugin&gt;\n            &lt;groupId&gt;org.apache.maven.plugins&lt;\/groupId&gt;\n            &lt;artifactId&gt;maven-surefire-plugin&lt;\/artifactId&gt;\n            &lt;version&gt;3.2.3&lt;\/version&gt;\n        &lt;\/plugin&gt;\n    &lt;\/plugins&gt;\n&lt;\/build&gt;<\/pre>\n\n\n\n<p><strong>Gradle\u3067\u306e\u8a2d\u5b9a<\/strong><\/p>\n\n\n\n<p><code>build.gradle<\/code>\u306b\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3092\u8ffd\u52a0\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">plugins {\n    id 'java'\n}\n\ndependencies {\n    \/\/ JUnit Jupiter API &amp; Engine\n    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.10.1'\n    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.10.1'\n\n    \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u7528\n    testImplementation 'org.junit.jupiter:junit-jupiter-params:5.10.1'\n}\n\ntest {\n    useJUnitPlatform()\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">IDE\u3067\u306eJUnit\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4e3b\u8981\u306aIDE\u3067\u306f\u3001JUnit\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u6a19\u6e96\u3067\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u3001\u4ee3\u8868\u7684\u306aIDE\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>IntelliJ IDEA<\/strong>\u306e\u5834\u5408\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306e\u8a2d\u5b9a\n<ul class=\"wp-block-list\">\n<li>\u65b0\u898f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306b\u300cAdditional Libraries and Frameworks\u300d\u3067\u300cJUnit\u300d\u3092\u9078\u629e<\/li>\n\n\n\n<li>Build System\u3067\u300cMaven\u300d\u307e\u305f\u306f\u300cGradle\u300d\u3092\u9078\u629e<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u65e2\u5b58\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u8ffd\u52a0\n<ul class=\"wp-block-list\">\n<li>Project Structure &gt; Modules &gt; Dependencies \u3067\u300c+\u300d\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af<\/li>\n\n\n\n<li>\u300cLibrary &gt; From Maven\u300d\u3092\u9078\u629e\u3057\u3001<code>org.junit.jupiter:junit-jupiter<\/code>\u3092\u691c\u7d22<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u4f5c\u6210\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u3057\u305f\u3044\u30af\u30e9\u30b9\u3067<code>Alt + Enter<\/code>\u3092\u62bc\u3057\u3001\u300cCreate Test\u300d\u3092\u9078\u629e<\/li>\n\n\n\n<li>\u5fc5\u8981\u306a\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u9078\u629e\u3057\u3066\u751f\u6210<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>Eclipse\u306e\u5834\u5408<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u8a2d\u5b9a\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u53f3\u30af\u30ea\u30c3\u30af &gt; Properties<\/li>\n\n\n\n<li>Java Build Path &gt; Libraries &gt; Add Library<\/li>\n\n\n\n<li>\u300cJUnit\u300d\u3092\u9078\u629e\u3057\u3001\u30d0\u30fc\u30b8\u30e7\u30f35\u3092\u6307\u5b9a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u4f5c\u6210\n<ul class=\"wp-block-list\">\n<li>\u30d1\u30c3\u30b1\u30fc\u30b8\u30a8\u30af\u30b9\u30d7\u30ed\u30fc\u30e9\u30fc\u3067\u30af\u30e9\u30b9\u3092\u53f3\u30af\u30ea\u30c3\u30af<\/li>\n\n\n\n<li>New &gt; JUnit Test Case \u3092\u9078\u629e<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u306e\u30b9\u30bf\u30d6\u3092\u751f\u6210<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#fff9e6;color:#ffb36b\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#ffb36b\"><i class=\"fas fa-pencil-alt\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/div><\/div><div class=\"sng-box-msg__contents\"><div id=\"id-b358d7be-98f3-4836-8eda-c10c48116ec9\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6ce8\u610f\u70b9<\/th><th>\u5bfe\u51e6\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4e0d\u4e00\u81f4<\/td><td>\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\u3068IDE\u3067\u540c\u3058\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u304c\u5b9f\u884c\u3055\u308c\u306a\u3044<\/td><td>Surefire\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u78ba\u8a8d<\/td><\/tr><tr><td>\u30af\u30e9\u30b9\u30d1\u30b9\u306e\u554f\u984c<\/td><td><code>test<\/code>\u30d5\u30a9\u30eb\u30c0\u304c\u30c6\u30b9\u30c8\u30bd\u30fc\u30b9\u3068\u3057\u3066\u8a8d\u8b58\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d<\/td><\/tr><tr><td>Java\u4e92\u63db\u6027<\/td><td>JDK 8\u4ee5\u4e0a\u3092\u4f7f\u7528\uff08JUnit 5\u306e\u8981\u4ef6\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>\u74b0\u5883\u69cb\u7bc9\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7c21\u5358\u306a\u30c6\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u3066\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.junit.jupiter.api.Test;\nimport static org.junit.jupiter.api.Assertions.assertTrue;\n\npublic class SetupTest {\n    @Test\n    void setupSuccessTest() {\n        assertTrue(true, \"JUnit setup is working!\");\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u30c6\u30b9\u30c8\u304c\u6b63\u5e38\u306b\u5b9f\u884c\u3067\u304d\u308c\u3070\u3001\u74b0\u5883\u69cb\u7bc9\u306f\u5b8c\u4e86\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001JUnit\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">JUnit\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306e\u4f5c\u6210\u65b9\u6cd5<\/h3>\n\n\n\n<p>JUnit\u3067\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u969b\u306e\u57fa\u672c\u7684\u306a\u30eb\u30fc\u30eb\u3068\u69cb\u9020\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306e\u547d\u540d\u898f\u5247<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u5bfe\u8c61\u30af\u30e9\u30b9\u540d + \u201cTest\u201d \u3068\u3044\u3046\u547d\u540d\u304c\u4e00\u822c\u7684<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306fpublic\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b<\/li>\n\n\n\n<li>JUnit 5\u3067\u306f\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306bpublic\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4e0d\u8981\uff08\u305f\u3060\u3057\u3001private\u306f\u4e0d\u53ef\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306e\u69cb\u9020\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30af\u30e9\u30b9\npublic class Calculator {\n    public int add(int a, int b) {\n        return a + b;\n    }\n}\n\n\/\/ \u30c6\u30b9\u30c8\u30af\u30e9\u30b9\nclass CalculatorTest {\n    private Calculator calculator;    \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\n\n    @BeforeEach\n    void setUp() {\n        calculator = new Calculator();    \/\/ \u30c6\u30b9\u30c8\u306e\u524d\u6e96\u5099\n    }\n\n    @Test\n    void addTest() {\n        \/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\n        int result = calculator.add(2, 3);\n        assertEquals(5, result);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">@Test\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>@Test\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u304c\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u6700\u3082\u57fa\u672c\u7684\u306a\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CalculatorTest {\n    @Test\n    void basicTest() {\n        \/\/ \u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\n        assertTrue(true);\n    }\n\n    @Test\n    @DisplayName(\"\u8db3\u3057\u7b97\u306e\u30c6\u30b9\u30c8\uff1a\u6b63\u306e\u6570\u540c\u58eb\")    \/\/ \u30c6\u30b9\u30c8\u540d\u306e\u6307\u5b9a\n    void additionPositiveTest() {\n        Calculator calc = new Calculator();\n        assertEquals(4, calc.add(2, 2));\n    }\n\n    @Test\n    @Disabled(\"\u3053\u306e\u30c6\u30b9\u30c8\u306f\u4e00\u6642\u7684\u306b\u7121\u52b9\u5316\u3055\u308c\u3066\u3044\u307e\u3059\")    \/\/ \u30c6\u30b9\u30c8\u306e\u7121\u52b9\u5316\n    void temporarilyDisabledTest() {\n        \/\/ \u5b9f\u88c5\u4e88\u5b9a\u306e\u30c6\u30b9\u30c8\n    }\n\n    @Test\n    @Timeout(value = 100, unit = TimeUnit.MILLISECONDS)    \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u8a2d\u5b9a\n    void performanceTest() {\n        \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>JUnit Jupiter\u306f\u3001\u69d8\u3005\u306a\u72b6\u6cc1\u306b\u5bfe\u5fdc\u3059\u308b\u8c4a\u5bcc\u306a\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class AssertionsDemo {\n    @Test\n    void basicAssertions() {\n        \/\/ \u7b49\u4fa1\u6027\u306e\u691c\u8a3c\n        assertEquals(4, 2 + 2);\n        assertNotEquals(5, 2 + 2);\n\n        \/\/ \u771f\u507d\u5024\u306e\u691c\u8a3c\n        assertTrue(3 &gt; 2);\n        assertFalse(2 &gt; 3);\n\n        \/\/ null\u30c1\u30a7\u30c3\u30af\n        String str = null;\n        assertNull(str);\n        str = \"test\";\n        assertNotNull(str);\n    }\n\n    @Test\n    void advancedAssertions() {\n        \/\/ \u914d\u5217\u306e\u6bd4\u8f03\n        int[] expected = {1, 2, 3};\n        int[] actual = {1, 2, 3};\n        assertArrayEquals(expected, actual);\n\n        \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u540c\u4e00\u6027\u691c\u8a3c\n        Object obj1 = new Object();\n        Object obj2 = obj1;\n        assertSame(obj1, obj2);\n\n        \/\/ \u4f8b\u5916\u306e\u691c\u8a3c\n        assertThrows(ArithmeticException.class, () -&gt; {\n            int result = 1 \/ 0;\n        });\n    }\n\n    @Test\n    void groupedAssertions() {\n        \/\/ \u8907\u6570\u306e\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u3092\u30b0\u30eb\u30fc\u30d7\u5316\n        assertAll(\"person\",\n            () -&gt; assertEquals(\"John\", person.getFirstName()),\n            () -&gt; assertEquals(\"Doe\", person.getLastName()),\n            () -&gt; assertEquals(30, person.getAge())\n        );\n    }\n}<\/pre>\n\n\n\n<p><strong>\u3088\u304f\u4f7f\u3046\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7<\/strong>:<\/p>\n\n\n<div id=\"id-915c5635-d47b-491c-9839-821b67cd32aa\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u7528\u9014<\/th><th>\u4f7f\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>assertEquals<\/td><td>\u5024\u304c\u7b49\u3057\u3044\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertEquals(expected, actual)<\/td><\/tr><tr><td>assertTrue<\/td><td>\u6761\u4ef6\u304c\u771f\u3067\u3042\u308b\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertTrue(condition)<\/td><\/tr><tr><td>assertFalse<\/td><td>\u6761\u4ef6\u304c\u507d\u3067\u3042\u308b\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertFalse(condition)<\/td><\/tr><tr><td>assertNull<\/td><td>\u5024\u304cnull\u3067\u3042\u308b\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertNull(value)<\/td><\/tr><tr><td>assertNotNull<\/td><td>\u5024\u304cnull\u3067\u306a\u3044\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertNotNull(value)<\/td><\/tr><tr><td>assertThrows<\/td><td>\u4f8b\u5916\u304c\u6295\u3052\u3089\u308c\u308b\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertThrows(Exception.class, executable)<\/td><\/tr><tr><td>assertTimeout<\/td><td>\u51e6\u7406\u304c\u6307\u5b9a\u6642\u9593\u5185\u306b\u5b8c\u4e86\u3059\u308b\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertTimeout(Duration, executable)<\/td><\/tr><tr><td>assertArrayEquals<\/td><td>\u914d\u5217\u304c\u7b49\u3057\u3044\u3053\u3068\u3092\u691c\u8a3c<\/td><td>assertArrayEquals(expectedArray, actualArray)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p class=\"is-style-sango-paragraph-memo-alt\">\u5b9f\u8df5\u7684\u306a\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserServiceTest {\n    private UserService userService;\n\n    @Test\n    void createUser_ValidData_Success() {\n        \/\/ Given\n        User user = new User(\"john@example.com\", \"John Doe\", \"password123\");\n\n        \/\/ When\n        User createdUser = userService.createUser(user);\n\n        \/\/ Then\n        assertAll(\"user\",\n            () -&gt; assertNotNull(createdUser.getId()),\n            () -&gt; assertEquals(user.getEmail(), createdUser.getEmail()),\n            () -&gt; assertEquals(user.getName(), createdUser.getName()),\n            () -&gt; assertTrue(createdUser.isActive())\n        );\n    }\n\n    @Test\n    void createUser_InvalidEmail_ThrowsException() {\n        \/\/ Given\n        User user = new User(\"invalid-email\", \"John Doe\", \"password123\");\n\n        \/\/ When &amp; Then\n        ValidationException exception = assertThrows(ValidationException.class,\n            () -&gt; userService.createUser(user)\n        );\n        assertEquals(\"Invalid email format\", exception.getMessage());\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u8981\u7d20\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u679c\u7684\u306a\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30c6\u30b9\u30c8\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">JUnit\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">@BeforeEach\u3068@AfterEach\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u5358\u4f4d\u3067\u306e\u524d\u51e6\u7406\u3068\u5f8c\u51e6\u7406\u3092\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>@BeforeEach\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DatabaseTest {\n    private Connection connection;\n    private TestData testData;\n\n    @BeforeEach\n    void setUp() {\n        \/\/ \u5404\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u5b9f\u884c\u524d\u306b\u884c\u3046\u51e6\u7406\n        connection = DatabaseConnection.create();\n        testData = new TestData();\n        testData.prepare();\n    }\n\n    @AfterEach\n    void tearDown() {\n        \/\/ \u5404\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u5b9f\u884c\u5f8c\u306b\u884c\u3046\u51e6\u7406\n        if (connection != null) {\n            connection.close();\n        }\n        testData.cleanup();\n    }\n\n    @Test\n    void testDatabaseInsert() {\n        \/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\n        assertTrue(connection.isValid(5));\n        \/\/ ... \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u306e\u30c6\u30b9\u30c8\n    }\n\n    @Test\n    void testDatabaseSelect() {\n        \/\/ \u5225\u306e\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\n        \/\/ \u5404\u30c6\u30b9\u30c8\u306e\u524d\u306bsetUp()\u304c\u5b9f\u884c\u3055\u308c\u3001\n        \/\/ \u7d42\u4e86\u5f8c\u306btearDown()\u304c\u5b9f\u884c\u3055\u308c\u308b\n    }\n}<\/pre>\n\n\n\n<p><strong>@BeforeEach\/@AfterEach\u306e\u4e3b\u306a\u7528\u9014<\/strong>:<\/p>\n\n\n<div id=\"id-7d1cbaaf-e859-4d48-9610-179f1202092d\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7528\u9014<\/th><th>\u5177\u4f53\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u6e96\u5099<\/td><td>\u30c6\u30b9\u30c8DB\u3078\u306e\u30c7\u30fc\u30bf\u6295\u5165<\/td><\/tr><tr><td>\u30ea\u30bd\u30fc\u30b9\u306e\u521d\u671f\u5316<\/td><td>\u63a5\u7d9a\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u4f5c\u6210<\/td><\/tr><tr><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u72b6\u614b\u8a2d\u5b9a<\/td><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u521d\u671f\u5316<\/td><\/tr><tr><td>\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e<\/td><td>\u63a5\u7d9a\u306e\u30af\u30ed\u30fc\u30ba\u3001\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u524a\u9664<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7<\/td><td>DB\u30ec\u30b3\u30fc\u30c9\u306e\u524a\u9664<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">@BeforeAll\u3068@AfterAll\u306e\u6d3b\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30af\u30e9\u30b9\u5168\u4f53\u3067\u4e00\u5ea6\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\u3092\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ResourceIntensiveTest {\n    private static ExpensiveResource resource;\n    private static TestServer server;\n\n    @BeforeAll\n    static void initAll() {\n        \/\/ \u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u5168\u4f53\u306e\u958b\u59cb\u524d\u306b1\u56de\u3060\u3051\u5b9f\u884c\n        resource = new ExpensiveResource();\n        server = TestServer.start(8080);\n    }\n\n    @AfterAll\n    static void tearDownAll() {\n        \/\/ \u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u5168\u4f53\u306e\u7d42\u4e86\u5f8c\u306b1\u56de\u3060\u3051\u5b9f\u884c\n        resource.release();\n        server.stop();\n    }\n\n    @Test\n    void test1() {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\u30c6\u30b9\u30c8\n        assertTrue(server.isRunning());\n        \/\/ ... \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\n    }\n\n    @Test\n    void test2() {\n        \/\/ \u540c\u3058\u30ea\u30bd\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5225\u306e\u30c6\u30b9\u30c8\n        assertNotNull(resource);\n        \/\/ ... \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\n    }\n}<\/pre>\n\n\n\n<p><strong>@BeforeAll\/@AfterAll\u306e\u4e3b\u306a\u6d3b\u7528\u30b7\u30fc\u30f3<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u91cd\u3044\u521d\u671f\u5316\u51e6\u7406\u306e\u5171\u6709<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DatabaseIntegrationTest {\n    private static DatabaseConnection connection;\n\n    @BeforeAll\n    static void initDatabase() {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30b9\u30ad\u30fc\u30de\u4f5c\u6210\u3084\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\n        connection = DatabaseConnection.create();\n        DatabaseSetup.initializeSchema(connection);\n    }\n\n    @AfterAll\n    static void cleanupDatabase() {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n        DatabaseSetup.dropSchema(connection);\n        connection.close();\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5916\u90e8\u30ea\u30bd\u30fc\u30b9\u306e\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ExternalServiceTest {\n    private static MockServer mockServer;\n\n    @BeforeAll\n    static void startMockServer() {\n        \/\/ \u30e2\u30c3\u30af\u30b5\u30fc\u30d0\u30fc\u306e\u8d77\u52d5\uff08\u5168\u30c6\u30b9\u30c8\u3067\u5171\u6709\uff09\n        mockServer = new MockServer(8089);\n        mockServer.start();\n    }\n\n    @AfterAll\n    static void stopMockServer() {\n        \/\/ \u30e2\u30c3\u30af\u30b5\u30fc\u30d0\u30fc\u306e\u505c\u6b62\n        mockServer.stop();\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u4e00\u62ec\u6e96\u5099<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class LargeDatasetTest {\n    private static List&lt;TestData&gt; testDataSet;\n\n    @BeforeAll\n    static void prepareTestData() {\n        \/\/ \u5927\u91cf\u306e\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u4e00\u5ea6\u3060\u3051\u6e96\u5099\n        testDataSet = TestDataGenerator.generateLargeDataset();\n    }\n\n    @BeforeEach\n    void setUp() {\n        \/\/ \u5404\u30c6\u30b9\u30c8\u3067\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u306e\u307f\u3092\u53d6\u5f97\n        TestData data = testDataSet.get(\/* index *\/);\n        \/\/ ... \u30c7\u30fc\u30bf\u306e\u6e96\u5099\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><strong>\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong>:<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u9069\u5207\u306a\u7ba1\u7406\n<ul class=\"wp-block-list\">\n<li>\u91cd\u3044\u30ea\u30bd\u30fc\u30b9\u306f@BeforeAll\u3067\u4e00\u5ea6\u3060\u3051\u521d\u671f\u5316<\/li>\n\n\n\n<li>\u5fc5\u305a\u5bfe\u5fdc\u3059\u308b\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u51e6\u7406\u3092\u5b9f\u88c5<\/li>\n\n\n\n<li>try-with-resources\u306e\u6d3b\u7528<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027\u78ba\u4fdd\n<ul class=\"wp-block-list\">\n<li>\u5404\u30c6\u30b9\u30c8\u3067\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u306f@BeforeEach\u3067\u500b\u5225\u306b\u6e96\u5099<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u9593\u3067\u72b6\u614b\u304c\u5171\u6709\u3055\u308c\u306a\u3044\u3088\u3046\u6ce8\u610f<\/li>\n\n\n\n<li>\u526f\u4f5c\u7528\u3092\u78ba\u5b9f\u306b\u6392\u9664<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\n<ul class=\"wp-block-list\">\n<li>\u5171\u901a\u306e\u524d\u51e6\u7406\u306f@BeforeAll\u306b\u96c6\u7d04<\/li>\n\n\n\n<li>\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u521d\u671f\u5316\u51e6\u7406\u306b\u7559\u3081\u308b<\/li>\n\n\n\n<li>\u91cd\u3044\u51e6\u7406\u306f\u53ef\u80fd\u306a\u9650\u308a\u5171\u6709<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306aJUnit\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u8df5\u7684\u306aJUnit\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5805\u7262\u6027\u3092\u78ba\u4fdd\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002JUnit 5\u3067\u306f\u3001\u4f8b\u5916\u30c6\u30b9\u30c8\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ExceptionTest {\n    @Test\n    void testBasicException() {\n        \/\/ \u57fa\u672c\u7684\u306a\u4f8b\u5916\u30c6\u30b9\u30c8\n        Exception exception = assertThrows(ArithmeticException.class, () -&gt; {\n            int result = 1 \/ 0;\n        });\n\n        assertEquals(\"\/ by zero\", exception.getMessage());\n    }\n\n    @Test\n    void testCustomException() {\n        \/\/ \u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306e\u30c6\u30b9\u30c8\n        class User {\n            void setAge(int age) {\n                if (age &lt; 0) {\n                    throw new IllegalArgumentException(\"Age cannot be negative\");\n                }\n            }\n        }\n\n        User user = new User();\n        IllegalArgumentException exception = assertThrows(\n            IllegalArgumentException.class,\n            () -&gt; user.setAge(-1)\n        );\n\n        assertTrue(exception.getMessage().contains(\"negative\"));\n    }\n\n    @Test\n    void testMultipleExceptions() {\n        \/\/ \u8907\u6570\u306e\u4f8b\u5916\u30d1\u30bf\u30fc\u30f3\u306e\u30c6\u30b9\u30c8\n        assertAll(\n            () -&gt; assertThrows(NullPointerException.class, () -&gt; {\n                String str = null;\n                str.length();\n            }),\n            () -&gt; assertThrows(NumberFormatException.class, () -&gt; {\n                Integer.parseInt(\"abc\");\n            })\n        );\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u5165\u529b\u5024\u3067\u540c\u3058\u30c6\u30b9\u30c8\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ParameterizedTest {\n    @ParameterizedTest\n    @ValueSource(strings = {\"racecar\", \"radar\", \"able was I ere I saw elba\"})\n    void palindromeTest(String candidate) {\n        \/\/ \u6587\u5b57\u5217\u304c\u56de\u6587\u304b\u3069\u3046\u304b\u3092\u30c6\u30b9\u30c8\n        assertTrue(isPalindrome(candidate));\n    }\n\n    @ParameterizedTest\n    @CsvSource({\n        \"1,1,2\",\n        \"2,3,5\",\n        \"5,8,13\",\n        \"21,34,55\"\n    })\n    void additionTest(int a, int b, int expected) {\n        assertEquals(expected, a + b);\n    }\n\n    @ParameterizedTest\n    @EnumSource(TimeUnit.class)\n    void testTimeUnitMinimumValue(TimeUnit unit) {\n        assertTrue(unit.toMillis(1) &gt; 0);\n    }\n\n    @ParameterizedTest\n    @MethodSource(\"provideTestData\")\n    void complexDataTest(TestData data) {\n        \/\/ \u30ab\u30b9\u30bf\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u305f\u30c6\u30b9\u30c8\n        assertNotNull(data);\n        assertTrue(data.isValid());\n    }\n\n    \/\/ MethodSource\u306e\u30c7\u30fc\u30bf\u63d0\u4f9b\u30e1\u30bd\u30c3\u30c9\n    static Stream&lt;TestData&gt; provideTestData() {\n        return Stream.of(\n            new TestData(\"test1\", 10),\n            new TestData(\"test2\", 20)\n        );\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30e2\u30c3\u30af\u3092\u4f7f\u3063\u305f\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9<\/h3>\n\n\n\n<p>Mockito\u3092\u4f7f\u7528\u3057\u305f\u30e2\u30c3\u30af\u30c6\u30b9\u30c8\u306e\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@ExtendWith(MockitoExtension.class)\nclass UserServiceTest {\n    @Mock\n    private UserRepository userRepository;\n\n    @Mock\n    private EmailService emailService;\n\n    @InjectMocks\n    private UserService userService;\n\n    @Test\n    void createUser_Success() {\n        \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u6e96\u5099\n        User user = new User(\"test@example.com\", \"password\");\n        User savedUser = new User(1L, \"test@example.com\", \"password\");\n\n        \/\/ \u30e2\u30c3\u30af\u306e\u632f\u308b\u821e\u3044\u3092\u5b9a\u7fa9\n        when(userRepository.save(any(User.class))).thenReturn(savedUser);\n        when(emailService.sendWelcomeEmail(any(User.class))).thenReturn(true);\n\n        \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u884c\n        User result = userService.createUser(user);\n\n        \/\/ \u691c\u8a3c\n        assertNotNull(result);\n        assertEquals(1L, result.getId());\n        verify(userRepository).save(user);\n        verify(emailService).sendWelcomeEmail(savedUser);\n    }\n\n    @Test\n    void createUser_EmailFailure() {\n        \/\/ \u30e1\u30fc\u30eb\u9001\u4fe1\u5931\u6557\u306e\u30b1\u30fc\u30b9\n        User user = new User(\"test@example.com\", \"password\");\n\n        when(userRepository.save(any(User.class)))\n            .thenReturn(new User(1L, \"test@example.com\", \"password\"));\n        when(emailService.sendWelcomeEmail(any(User.class)))\n            .thenReturn(false);\n\n        \/\/ \u4f8b\u5916\u304c\u6295\u3052\u3089\u308c\u308b\u3053\u3068\u3092\u691c\u8a3c\n        assertThrows(EmailException.class, () -&gt; userService.createUser(user));\n\n        \/\/ \u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u691c\u8a3c\n        verify(userRepository).delete(anyLong());\n    }\n\n    @Test\n    void findUser_WithCaching() {\n        \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u52d5\u4f5c\u3092\u691c\u8a3c\u3059\u308b\u30c6\u30b9\u30c8\n        Long userId = 1L;\n        User user = new User(userId, \"test@example.com\", \"password\");\n\n        when(userRepository.findById(userId)).thenReturn(Optional.of(user));\n\n        \/\/ 1\u56de\u76ee\u306e\u547c\u3073\u51fa\u3057\n        User result1 = userService.findUser(userId);\n        \/\/ 2\u56de\u76ee\u306e\u547c\u3073\u51fa\u3057\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97\u3055\u308c\u308b\u306f\u305a\uff09\n        User result2 = userService.findUser(userId);\n\n        \/\/ \u30ea\u30dd\u30b8\u30c8\u30ea\u306f1\u56de\u3060\u3051\u547c\u3070\u308c\u308b\u3053\u3068\u3092\u691c\u8a3c\n        verify(userRepository, times(1)).findById(userId);\n        assertEquals(result1, result2);\n    }\n}<\/pre>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt\">\u5b9f\u8df5\u7684\u306a\u30c6\u30b9\u30c8\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u308b\u30e2\u30c3\u30af\u30d1\u30bf\u30fc\u30f3\uff1a<\/p>\n\n\n<div id=\"id-31c4f7a4-d9d4-4337-9247-b614610a9a0e\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30bf\u30fc\u30f3<\/th><th>\u7528\u9014<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>verify()<\/td><td>\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306e\u691c\u8a3c<\/td><td>verify(repository).save(user)<\/td><\/tr><tr><td>times()<\/td><td>\u547c\u3073\u51fa\u3057\u56de\u6570\u306e\u691c\u8a3c<\/td><td>verify(service, times(2)).process()<\/td><\/tr><tr><td>any()<\/td><td>\u5f15\u6570\u306e\u30de\u30c3\u30c1\u30f3\u30b0<\/td><td>when(repository.find(any()))<\/td><\/tr><tr><td>doThrow()<\/td><td>\u4f8b\u5916\u306e\u30e2\u30c3\u30af<\/td><td>doThrow(new Exception()).when(service)<\/td><\/tr><tr><td>doAnswer()<\/td><td>\u30ab\u30b9\u30bf\u30e0\u5fdc\u7b54\u306e\u5b9a\u7fa9<\/td><td>doAnswer(invocation -&gt; {\u2026})<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u30c6\u30b9\u30c8\u624b\u6cd5\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c6\u30b9\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001JUnit\u30c6\u30b9\u30c8\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">JUnit\u30c6\u30b9\u30c8\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u547d\u540d\u898f\u5247<\/h3>\n\n\n\n<p>\u52b9\u679c\u7684\u306a\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u547d\u540d\u306f\u3001\u30c6\u30b9\u30c8\u306e\u76ee\u7684\u3068\u671f\u5f85\u3055\u308c\u308b\u7d50\u679c\u3092\u660e\u78ba\u306b\u4f1d\u3048\u308b\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30af\u30e9\u30b9\u540d\u306e\u547d\u540d\u898f\u5247<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u30d1\u30bf\u30fc\u30f3\npublic class UserServiceTest { }        \/\/ \u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\u30af\u30e9\u30b9\npublic class UserServiceIT { }          \/\/ \u7d50\u5408\u30c6\u30b9\u30c8\uff08Integration Test\uff09\npublic class UserServicePerformanceTest { }  \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8<\/pre>\n\n\n\n<p><strong>\u30e1\u30bd\u30c3\u30c9\u540d\u306e\u547d\u540d\u898f\u5247<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class OrderServiceTest {\n    @Test\n    void createOrder_ValidInput_ReturnsOrderId() {\n        \/\/ \u30c6\u30b9\u30c8\u30b1\u30fc\u30b91: \u6b63\u5e38\u7cfb - \u6709\u52b9\u306a\u5165\u529b\u3067\u306e\u6ce8\u6587\u4f5c\u6210\n    }\n\n    @Test\n    void createOrder_InvalidPrice_ThrowsException() {\n        \/\/ \u30c6\u30b9\u30c8\u30b1\u30fc\u30b92: \u7570\u5e38\u7cfb - \u7121\u52b9\u306a\u4fa1\u683c\u3067\u306e\u30a8\u30e9\u30fc\u51e6\u7406\n    }\n\n    @Test\n    void cancelOrder_OrderExists_UpdatesStatus() {\n        \/\/ \u30c6\u30b9\u30c8\u30b1\u30fc\u30b93: \u6b63\u5e38\u7cfb - \u65e2\u5b58\u6ce8\u6587\u306e\u30ad\u30e3\u30f3\u30bb\u30eb\n    }\n}<\/pre>\n\n\n\n<p>\u547d\u540d\u30d1\u30bf\u30fc\u30f3: <code>[\u30c6\u30b9\u30c8\u5bfe\u8c61\u30e1\u30bd\u30c3\u30c9]_[\u30c6\u30b9\u30c8\u6761\u4ef6]_[\u671f\u5f85\u3055\u308c\u308b\u7d50\u679c]<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027\u3092\u4fdd\u3064\u30b3\u30c4<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027\u306f\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c6\u30b9\u30c8\u30b9\u30a4\u30fc\u30c8\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserManagementTest {\n    private UserService userService;\n    private TestDatabase testDb;\n\n    @BeforeEach\n    void setUp() {\n        \/\/ \u5404\u30c6\u30b9\u30c8\u3067\u72ec\u7acb\u3057\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u74b0\u5883\u3092\u7528\u610f\n        testDb = new TestDatabase();\n        testDb.initialize();\n        userService = new UserService(testDb);\n    }\n\n    @Test\n    void registerUser_ShouldNotAffectOtherTests() {\n        \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u6e96\u5099\n        User newUser = new User(\"test@example.com\");\n\n        \/\/ \u30c6\u30b9\u30c8\u306e\u5b9f\u884c\n        userService.register(newUser);\n\n        \/\/ \u691c\u8a3c\n        assertTrue(userService.exists(\"test@example.com\"));\n    }\n\n    @Test\n    void findUser_ShouldWorkIndependently() {\n        \/\/ \u524d\u306e\u30c6\u30b9\u30c8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\n        assertFalse(userService.exists(\"test@example.com\"));\n    }\n\n    @AfterEach\n    void tearDown() {\n        \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n        testDb.cleanup();\n    }\n}<\/pre>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt\">\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027\u3092\u4fdd\u3064\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n<div id=\"id-5388f4b1-7ea9-4986-9b5f-6bd7a8ab2de8\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>\u5177\u4f53\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u5171\u6709\u30ea\u30bd\u30fc\u30b9\u306e\u5206\u96e2<\/td><td>\u30c6\u30b9\u30c8\u5c02\u7528DB\u306e\u4f7f\u7528\u3001\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u96e2<\/td><\/tr><tr><td>\u72b6\u614b\u306e\u30ea\u30bb\u30c3\u30c8<\/td><td>@BeforeEach\u3067\u306e\u521d\u671f\u5316\u3001@AfterEach\u3067\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7<\/td><\/tr><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u72b6\u614b\u306e\u56de\u907f<\/td><td>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f7f\u7528\u5236\u9650\u3001\u30c6\u30b9\u30c8\u7528\u306e\u8a2d\u5b9a\u5206\u96e2<\/td><\/tr><tr><td>\u5916\u90e8\u4f9d\u5b58\u306e\u7ba1\u7406<\/td><td>\u30e2\u30c3\u30af\u306e\u6d3b\u7528\u3001\u30c6\u30b9\u30c8\u7528\u30b9\u30bf\u30d6\u306e\u4f7f\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u306e\u8003\u3048\u65b9<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u306f\u54c1\u8cea\u6307\u6a19\u306e\u4e00\u3064\u3067\u3059\u304c\u3001\u6570\u5024\u3060\u3051\u3092\u8ffd\u6c42\u3059\u308b\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p><strong>\u52b9\u679c\u7684\u306a\u30ab\u30d0\u30ec\u30c3\u30b8\u6226\u7565<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class PaymentProcessorTest {\n    @Test\n    void processPayment_CoversCriticalPath() {\n        \/\/ \u4e3b\u8981\u306a\u51e6\u7406\u30d1\u30b9\u306e\u30c6\u30b9\u30c8\n        PaymentProcessor processor = new PaymentProcessor();\n        Payment payment = new Payment(100.0, \"USD\");\n\n        PaymentResult result = processor.process(payment);\n\n        assertAll(\n            () -&gt; assertTrue(result.isSuccessful()),\n            () -&gt; assertNotNull(result.getTransactionId()),\n            () -&gt; assertEquals(PaymentStatus.COMPLETED, result.getStatus())\n        );\n    }\n\n    @Test\n    void processPayment_CoversEdgeCases() {\n        PaymentProcessor processor = new PaymentProcessor();\n\n        \/\/ \u30a8\u30c3\u30b8\u30b1\u30fc\u30b91: \u6700\u5c0f\u91d1\u984d\n        assertDoesNotThrow(() -&gt; processor.process(new Payment(0.01, \"USD\")));\n\n        \/\/ \u30a8\u30c3\u30b8\u30b1\u30fc\u30b92: \u6700\u5927\u91d1\u984d\n        assertDoesNotThrow(() -&gt; processor.process(new Payment(999999.99, \"USD\")));\n\n        \/\/ \u30a8\u30c3\u30b8\u30b1\u30fc\u30b93: \u7121\u52b9\u306a\u901a\u8ca8\n        assertThrows(IllegalArgumentException.class, \n            () -&gt; processor.process(new Payment(100.0, \"INVALID\")));\n    }\n}<\/pre>\n\n\n\n<p><strong>\u512a\u5148\u9806\u4f4d\u4ed8\u3051\u306e\u6307\u91dd<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u91cd\u8981\u5ea6\u306b\u57fa\u3065\u304f\u30c6\u30b9\u30c8<\/strong>:<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BankingSystemTest {\n    @Test\n    @Tag(\"critical\")\n    void transferMoney_CoreFunctionality() {\n        \/\/ \u6700\u91cd\u8981\u6a5f\u80fd\u306e\u30c6\u30b9\u30c8\n    }\n\n    @Test\n    @Tag(\"security\")\n    void authenticate_SecurityCritical() {\n        \/\/ \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u91cd\u8981\u6a5f\u80fd\u306e\u30c6\u30b9\u30c8\n    }\n\n    @Test\n    @Tag(\"ui\")\n    void displayBalance_UITest() {\n        \/\/ UI\u6a5f\u80fd\u306e\u30c6\u30b9\u30c8\uff08\u512a\u5148\u5ea6\u4f4e\uff09\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30ea\u30b9\u30af\u30d9\u30fc\u30b9\u306e\u30c6\u30b9\u30c8\u6226\u7565<\/strong>:<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class FinancialCalculatorTest {\n    private FinancialCalculator calculator;\n\n    @Test\n    @DisplayName(\"High Risk: Interest calculation for large amounts\")\n    void calculateInterest_HighRisk() {\n        \/\/ \u9ad8\u30ea\u30b9\u30af: \u5927\u91d1\u984d\u306e\u5229\u606f\u8a08\u7b97\n        BigDecimal principal = new BigDecimal(\"1000000.00\");\n        BigDecimal rate = new BigDecimal(\"0.05\");\n\n        BigDecimal result = calculator.calculateInterest(principal, rate);\n\n        assertEquals(new BigDecimal(\"50000.00\"), result);\n    }\n\n    @Test\n    @DisplayName(\"Medium Risk: Rounding behavior\")\n    void calculateInterest_RoundingBehavior() {\n        \/\/ \u4e2d\u30ea\u30b9\u30af: \u7aef\u6570\u51e6\u7406\n        BigDecimal principal = new BigDecimal(\"100.33\");\n        BigDecimal rate = new BigDecimal(\"0.03\");\n\n        BigDecimal result = calculator.calculateInterest(principal, rate);\n\n        assertEquals(new BigDecimal(\"3.01\"), result);\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u6539\u5584\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li><strong>\u5883\u754c\u5024\u5206\u6790<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u6700\u5c0f\u5024\u3001\u6700\u5927\u5024<\/li>\n\n\n\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9<\/li>\n\n\n\n<li>\u7121\u52b9\u306a\u5165\u529b\u5024<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u540c\u5024\u5206\u5272<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9<\/li>\n\n\n\n<li>\u5178\u578b\u7684\u306a\u30a8\u30e9\u30fc\u30b1\u30fc\u30b9<\/li>\n\n\n\n<li>\u5883\u754c\u4ed8\u8fd1\u306e\u5024<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6761\u4ef6\u7db2\u7f85<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u3059\u3079\u3066\u306e\u5206\u5c90<\/li>\n\n\n\n<li>\u91cd\u8981\u306a\u6761\u4ef6\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n\n\n\n<li>\u4f8b\u5916\u30d1\u30b9<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c6\u30b9\u30c8\u30b9\u30a4\u30fc\u30c8\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u304f\u3042\u308bJUnit\u306e\u30a8\u30e9\u30fc\u3068\u89e3\u6c7a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-21\">\u3088\u304f\u3042\u308bJUnit\u306e\u30a8\u30e9\u30fc\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30c6\u30b9\u30c8\u5b9f\u884c\u6642\u306e\u4e3b\u306a\u30a8\u30e9\u30fc\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p>JUnit\u30c6\u30b9\u30c8\u5b9f\u884c\u6642\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u30c6\u30b9\u30c8\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u30a8\u30e9\u30fc<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u4f8b:\n\/\/ No tests found for given includes: [com.example.MyTest]\n\n\/\/ \u539f\u56e01: \u30c6\u30b9\u30c8\u30af\u30e9\u30b9\u306e\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u304c\u4e0d\u9069\u5207\nprivate class MyTest {  \/\/ \u274c \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30af\u30e9\u30b9\n    @Test\n    void test() { }\n}\n\n\/\/ \u89e3\u6c7a\u7b56:\nclass MyTest {  \/\/ \u2705 \u30d1\u30c3\u30b1\u30fc\u30b8\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u307e\u305f\u306fpublic\n    @Test\n    void test() { }\n}\n\n\/\/ \u539f\u56e02: \u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u306e\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u304c\u4e0d\u9069\u5207\nclass MyTest {\n    private @Test void test() { }  \/\/ \u274c \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\n}\n\n\/\/ \u89e3\u6c7a\u7b56:\nclass MyTest {\n    @Test void test() { }  \/\/ \u2705 \u30d1\u30c3\u30b1\u30fc\u30b8\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u307e\u305f\u306fpublic\n}<\/pre>\n\n\n\n<p><strong>2. \u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u5931\u6557\u306e\u9069\u5207\u306a\u5bfe\u51e6<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class AssertionErrorTest {\n    @Test\n    void demonstrateCommonAssertionErrors() {\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\n        List&lt;String&gt; items = Arrays.asList(\"apple\", \"banana\");\n        assertEquals(Arrays.asList(\"apple\", \"banana\"), items);  \/\/ \u274c \u53c2\u7167\u306e\u6bd4\u8f03\n\n        \/\/ \u6539\u5584\u7b561: \u5024\u306e\u6bd4\u8f03\u3092\u660e\u793a\u7684\u306b\u884c\u3046\n        assertIterableEquals(Arrays.asList(\"apple\", \"banana\"), items);  \/\/ \u2705\n\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u6bd4\u8f03\n        double result = 0.1 + 0.2;\n        assertEquals(0.3, result);  \/\/ \u274c \u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u8aa4\u5dee\n\n        \/\/ \u6539\u5584\u7b562: \u30c7\u30eb\u30bf\u5024\u3092\u4f7f\u7528\n        assertEquals(0.3, result, 0.000001);  \/\/ \u2705\n    }\n\n    @Test\n    void demonstrateNullCheckErrors() {\n        String value = null;\n\n        \/\/ \u554f\u984c\u306e\u3042\u308bnull\u30c1\u30a7\u30c3\u30af\n        assertTrue(value == null);  \/\/ \u274c \u975e\u63a8\u5968\n\n        \/\/ \u6539\u5584\u7b56: \u5c02\u7528\u306e\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\n        assertNull(value);  \/\/ \u2705\n    }\n}<\/pre>\n\n\n\n<p><strong>3. \u30bf\u30a4\u30df\u30f3\u30b0\u95a2\u9023\u306e\u30a8\u30e9\u30fc<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class TimingTest {\n    @Test\n    void demonstrateTimingIssues() {\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u30c6\u30b9\u30c8\n        CompletableFuture&lt;String&gt; future = CompletableFuture\n            .supplyAsync(() -&gt; {\n                \/\/ \u975e\u540c\u671f\u51e6\u7406\n                return \"result\";\n            });\n\n        \/\/ \u274c \u975e\u540c\u671f\u51e6\u7406\u306e\u5b8c\u4e86\u3092\u5f85\u305f\u306a\u3044\n        assertEquals(\"result\", future.get());  \/\/ TimeoutException\n\n        \/\/ \u6539\u5584\u7b56: \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u9069\u5207\u306b\u8a2d\u5b9a\n        @Test\n        void improvedTimingTest() {\n            CompletableFuture&lt;String&gt; future = CompletableFuture\n                .supplyAsync(() -&gt; {\n                    return \"result\";\n                });\n\n            \/\/ \u2705 \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u6307\u5b9a\n            String result = assertTimeoutPreemptively(\n                Duration.ofSeconds(5),\n                () -&gt; future.get()\n            );\n            assertEquals(\"result\", result);\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30c7\u30d0\u30c3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u52b9\u679c\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u30c7\u30d0\u30c3\u30b0\u30ed\u30b0\u306e\u6d3b\u7528<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DebuggingDemoTest {\n    private static final Logger logger = \n        LoggerFactory.getLogger(DebuggingDemoTest.class);\n\n    @Test\n    void demonstrateDebugging() {\n        \/\/ \u30c6\u30b9\u30c8\u5b9f\u884c\u524d\u306e\u72b6\u614b\u3092\u30ed\u30b0\u51fa\u529b\n        User user = new User(\"test@example.com\");\n        logger.debug(\"Testing with user: {}\", user);\n\n        try {\n            userService.register(user);\n            logger.debug(\"User registered successfully\");\n        } catch (Exception e) {\n            logger.error(\"Error during user registration: {}\", e.getMessage());\n            throw e;\n        }\n    }\n}<\/pre>\n\n\n\n<p><strong>2. \u30c6\u30b9\u30c8\u5931\u6557\u6642\u306e\u8a73\u7d30\u60c5\u5831\u8868\u793a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DetailedErrorTest {\n    @Test\n    void demonstrateDetailedErrors() {\n        List&lt;User&gt; users = userService.findAll();\n\n        \/\/ \u274c \u60c5\u5831\u304c\u4e0d\u8db3\u3059\u308b\u5931\u6557\u30e1\u30c3\u30bb\u30fc\u30b8\n        assertTrue(users.size() &gt; 0);\n\n        \/\/ \u2705 \u8a73\u7d30\u306a\u5931\u6557\u30e1\u30c3\u30bb\u30fc\u30b8\n        assertTrue(\n            users.size() &gt; 0,\n            () -&gt; String.format(\n                \"Expected users to be non-empty but got %d users. DB state: %s\",\n                users.size(),\n                getDatabaseState()\n            )\n        );\n    }\n}<\/pre>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt\"><strong>\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u4e00\u89a7<\/strong>:<\/p>\n\n\n<div id=\"id-4a12d34c-bcf3-4d86-aa4a-1de0e423b16f\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30a8\u30e9\u30fc<\/th><th>\u539f\u56e0<\/th><th>\u89e3\u6c7a\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>NoSuchMethodError<\/td><td>JUnit\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u4e0d\u4e00\u81f4<\/td><td>pom.xml\/build.gradle\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u78ba\u8a8d<\/td><\/tr><tr><td>TestEngine not found<\/td><td>JUnit Platform\u306e\u8a2d\u5b9a\u4e0d\u5099<\/td><td>\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\u306e\u8a2d\u5b9a\u78ba\u8a8d<\/td><\/tr><tr><td>OutOfMemoryError<\/td><td>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3001\u5927\u304d\u3059\u304e\u308b\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf<\/td><td>@AfterEach\u3067\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3001\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u6700\u9069\u5316<\/td><\/tr><tr><td>NullPointerException<\/td><td>\u521d\u671f\u5316\u6f0f\u308c\u3001\u30e2\u30c3\u30af\u306e\u8a2d\u5b9a\u30df\u30b9<\/td><td>@BeforeEach\u3067\u306e\u521d\u671f\u5316\u78ba\u8a8d\u3001\u30e2\u30c3\u30af\u8a2d\u5b9a\u306e\u898b\u76f4\u3057<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><strong>\u30c7\u30d0\u30c3\u30b0\u6642\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/strong>:<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li><strong>\u74b0\u5883\u306e\u78ba\u8a8d<\/strong>\n<ul class=\"wp-block-list\">\n<li>JUnit\u306e\u30d0\u30fc\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u4f9d\u5b58\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u7af6\u5408<\/li>\n\n\n\n<li>\u30af\u30e9\u30b9\u30d1\u30b9\u306e\u8a2d\u5b9a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u306e\u72ec\u7acb\u6027<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4ed6\u306e\u30c6\u30b9\u30c8\u306e\u5f71\u97ff<\/li>\n\n\n\n<li>\u5171\u6709\u30ea\u30bd\u30fc\u30b9\u306e\u72b6\u614b<\/li>\n\n\n\n<li>\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u306e\u6f0f\u308c<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u975e\u6c7a\u5b9a\u7684\u306a\u8981\u7d20<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30bf\u30a4\u30df\u30f3\u30b0\u4f9d\u5b58<\/li>\n\n\n\n<li>\u4e26\u884c\u5b9f\u884c\u306e\u554f\u984c<\/li>\n\n\n\n<li>\u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u306e\u72b6\u614b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a<\/li>\n\n\n\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bd\u30b1\u30c3\u30c8<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u5bfe\u51e6\u65b9\u6cd5\u3068\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u30c6\u30b9\u30c8\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001JUnit\u3067\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u3092\u59cb\u3081\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-24\">JUnit\u3067\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u3092\u59cb\u3081\u3088\u3046<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\uff08TDD\uff09\u306f\u300cRed \u2192 Green \u2192 Refactor\u300d\u306e\u30b5\u30a4\u30af\u30eb\u3067\u9032\u3081\u3066\u3044\u304d\u307e\u3059\u3002JUnit\u3092\u4f7f\u7528\u3057\u305fTDD\u306e\u5177\u4f53\u7684\u306a\u5b9f\u8df5\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Step 1: \u5931\u6557\u3059\u308b\u30c6\u30b9\u30c8\u3092\u66f8\u304f\uff08Red\uff09\nclass ShoppingCartTest {\n    @Test\n    void addItem_ShouldIncreaseTotal() {\n        ShoppingCart cart = new ShoppingCart();\n        CartItem item = new CartItem(\"\u66f8\u7c4d\", 2000);\n\n        cart.addItem(item);  \/\/ \u3053\u306e\u6642\u70b9\u3067\u306fShoppingCart\u30af\u30e9\u30b9\u306f\u672a\u5b9f\u88c5\n\n        assertEquals(2000, cart.getTotal());\n    }\n}\n\n\/\/ Step 2: \u30c6\u30b9\u30c8\u304c\u901a\u308b\u3088\u3046\u306b\u5b9f\u88c5\u3059\u308b\uff08Green\uff09\npublic class ShoppingCart {\n    private List&lt;CartItem&gt; items = new ArrayList&lt;&gt;();\n\n    public void addItem(CartItem item) {\n        items.add(item);\n    }\n\n    public int getTotal() {\n        return items.stream()\n            .mapToInt(CartItem::getPrice)\n            .sum();\n    }\n}\n\n\/\/ Step 3: \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\uff08Refactor\uff09\npublic class ShoppingCart {\n    private final List&lt;CartItem&gt; items = new ArrayList&lt;&gt;();\n\n    public void addItem(CartItem item) {\n        Objects.requireNonNull(item, \"Item cannot be null\");\n        items.add(item);\n    }\n\n    public int getTotal() {\n        return items.stream()\n            .mapToInt(CartItem::getPrice)\n            .sum();\n    }\n\n    public List&lt;CartItem&gt; getItems() {\n        return Collections.unmodifiableList(items);\n    }\n}<\/pre>\n\n\n\n<p class=\"is-style-sango-paragraph-exclamation-alt\">TDD\u306e\u5404\u30b9\u30c6\u30c3\u30d7\u3067\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n<div id=\"id-f5fff991-9c03-4d5f-b188-4c64ce1d99e2\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30b9\u30c6\u30c3\u30d7<\/th><th>\u6ce8\u610f\u70b9<\/th><th>\u5177\u4f53\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>Red<\/td><td>\u6700\u5c0f\u9650\u306e\u30c6\u30b9\u30c8\u3092\u66f8\u304f<\/td><td>1\u3064\u306e\u6a5f\u80fd\u306b1\u3064\u306e\u30c6\u30b9\u30c8<\/td><\/tr><tr><td>Green<\/td><td>\u3068\u306b\u304b\u304f\u52d5\u304f\u3088\u3046\u306b\u5b9f\u88c5<\/td><td>\u4e00\u6642\u7684\u306a\u5b9f\u88c5\u3067\u3082OK<\/td><\/tr><tr><td>Refactor<\/td><td>\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u6539\u5584<\/td><td>\u91cd\u8907\u9664\u53bb\u3001\u547d\u540d\u6539\u5584<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u5b9f\u8df5\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/h3>\n\n\n\n<p>\u30aa\u30f3\u30e9\u30a4\u30f3\u66f8\u5e97\u306e\u5546\u54c1\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u4f8b\u306b\u3001TDD\u3067\u306e\u958b\u767a\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u8981\u4ef6\u306e\u6574\u7406<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/*\n\u8981\u4ef6:\n- \u66f8\u7c4d\u306e\u8ffd\u52a0\u3001\u691c\u7d22\u3001\u5728\u5eab\u7ba1\u7406\u304c\u3067\u304d\u308b\n- \u66f8\u7c4d\u306f\u984c\u540d\u3001\u8457\u8005\u3001\u4fa1\u683c\u3001\u5728\u5eab\u6570\u3092\u6301\u3064\n- \u5728\u5eab\u5207\u308c\u306e\u5834\u5408\u306f\u4f8b\u5916\u3092\u6295\u3052\u308b\n- \u691c\u7d22\u306f\u984c\u540d\u307e\u305f\u306f\u8457\u8005\u3067\u90e8\u5206\u4e00\u81f4\n*\/\n\n\/\/ \u6700\u521d\u306e\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\nclass BookStoreTest {\n    private BookStore store;\n\n    @BeforeEach\n    void setUp() {\n        store = new BookStore();\n    }\n\n    @Test\n    void addBook_ShouldStoreBookInformation() {\n        \/\/ Given\n        Book book = new Book(\n            \"JUnit\u5b9f\u8df5\u5165\u9580\",\n            \"TDD\u592a\u90ce\",\n            3000,\n            5\n        );\n\n        \/\/ When\n        store.addBook(book);\n\n        \/\/ Then\n        Optional&lt;Book&gt; found = store.findByTitle(\"JUnit\u5b9f\u8df5\u5165\u9580\");\n        assertTrue(found.isPresent());\n        assertEquals(\"TDD\u592a\u90ce\", found.get().getAuthor());\n    }\n}<\/pre>\n\n\n\n<p><strong>2. \u6bb5\u968e\u7684\u306a\u5b9f\u88c5<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u66f8\u7c4d\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\npublic class Book {\n    private final String title;\n    private final String author;\n    private final int price;\n    private int stock;\n\n    public Book(String title, String author, int price, int stock) {\n        this.title = Objects.requireNonNull(title, \"Title cannot be null\");\n        this.author = Objects.requireNonNull(author, \"Author cannot be null\");\n        if (price &lt; 0) throw new IllegalArgumentException(\"Price must be positive\");\n        if (stock &lt; 0) throw new IllegalArgumentException(\"Stock must be positive\");\n        this.price = price;\n        this.stock = stock;\n    }\n\n    \/\/ Getters\n    public String getTitle() { return title; }\n    public String getAuthor() { return author; }\n    public int getPrice() { return price; }\n    public int getStock() { return stock; }\n\n    \/\/ \u5728\u5eab\u306e\u66f4\u65b0\n    public void decreaseStock(int quantity) {\n        if (quantity &gt; stock) {\n            throw new OutOfStockException(\"Insufficient stock\");\n        }\n        stock -= quantity;\n    }\n}\n\n\/\/ \u66f8\u5e97\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\npublic class BookStore {\n    private final List&lt;Book&gt; books = new ArrayList&lt;&gt;();\n\n    public void addBook(Book book) {\n        Objects.requireNonNull(book);\n        books.add(book);\n    }\n\n    public Optional&lt;Book&gt; findByTitle(String title) {\n        return books.stream()\n            .filter(book -&gt; book.getTitle().contains(title))\n            .findFirst();\n    }\n\n    public List&lt;Book&gt; findByAuthor(String author) {\n        return books.stream()\n            .filter(book -&gt; book.getAuthor().contains(author))\n            .collect(Collectors.toList());\n    }\n\n    public void purchase(String title, int quantity) {\n        Book book = findByTitle(title)\n            .orElseThrow(() -&gt; new BookNotFoundException(title));\n        book.decreaseStock(quantity);\n    }\n}<\/pre>\n\n\n\n<p><strong>3. \u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u8ffd\u52a0<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BookStoreTest {\n    @Test\n    void findByAuthor_ShouldReturnAllBooksFromAuthor() {\n        \/\/ Given\n        store.addBook(new Book(\"Book1\", \"Author A\", 1000, 1));\n        store.addBook(new Book(\"Book2\", \"Author A\", 2000, 2));\n        store.addBook(new Book(\"Book3\", \"Author B\", 3000, 3));\n\n        \/\/ When\n        List&lt;Book&gt; found = store.findByAuthor(\"Author A\");\n\n        \/\/ Then\n        assertEquals(2, found.size());\n        assertTrue(found.stream()\n            .allMatch(book -&gt; book.getAuthor().equals(\"Author A\")));\n    }\n\n    @Test\n    void purchase_ShouldDecreaseStock() {\n        \/\/ Given\n        Book book = new Book(\"Test Book\", \"Author\", 1000, 5);\n        store.addBook(book);\n\n        \/\/ When\n        store.purchase(\"Test Book\", 3);\n\n        \/\/ Then\n        assertEquals(2, book.getStock());\n    }\n\n    @Test\n    void purchase_InsufficientStock_ShouldThrowException() {\n        \/\/ Given\n        Book book = new Book(\"Test Book\", \"Author\", 1000, 2);\n        store.addBook(book);\n\n        \/\/ When &amp; Then\n        assertThrows(OutOfStockException.class, () -&gt; \n            store.purchase(\"Test Book\", 3)\n        );\n    }\n}<\/pre>\n\n\n\n<p><strong>4. \u6a5f\u80fd\u306e\u62e1\u5f35<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5272\u5f15\u6a5f\u80fd\u306e\u8ffd\u52a0\nclass BookStoreTest {\n    @Test\n    void applyDiscount_ShouldReducePrice() {\n        \/\/ Given\n        Book book = new Book(\"\u5272\u5f15\u672c\", \"\u8457\u8005\", 2000, 1);\n        store.addBook(book);\n\n        \/\/ When\n        store.applyDiscount(\"\u5272\u5f15\u672c\", 20); \/\/ 20%\u5272\u5f15\n\n        \/\/ Then\n        Optional&lt;Book&gt; discounted = store.findByTitle(\"\u5272\u5f15\u672c\");\n        assertTrue(discounted.isPresent());\n        assertEquals(1600, discounted.get().getPrice());\n    }\n}\n\n\/\/ \u5b9f\u88c5\u306e\u8ffd\u52a0\npublic class Book {\n    private int currentPrice;\n\n    public void applyDiscount(int percentageOff) {\n        if (percentageOff &lt; 0 || percentageOff &gt; 100) {\n            throw new IllegalArgumentException(\"Invalid discount percentage\");\n        }\n        currentPrice = price * (100 - percentageOff) \/ 100;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001TDD\u3092\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li><strong>\u8a2d\u8a08\u306e\u6539\u5584<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4f7f\u3044\u3084\u3059\u3055\u3092\u5148\u306b\u8003\u3048\u308b<\/li>\n\n\n\n<li>\u4f9d\u5b58\u95a2\u4fc2\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u8cac\u52d9\u306e\u9069\u5207\u306a\u5206\u5272<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u54c1\u8cea\u306e\u78ba\u4fdd<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b<\/li>\n\n\n\n<li>\u56de\u5e30\u30c6\u30b9\u30c8\u306e\u81ea\u52d5\u5316<\/li>\n\n\n\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u8003\u616e<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u958b\u767a\u306e\u52b9\u7387\u5316<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u6a5f\u80fd\u306b\u96c6\u4e2d<\/li>\n\n\n\n<li>\u30aa\u30fc\u30d0\u30fc\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u8fc5\u901f\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>JUnit\u3092\u4f7f\u3063\u305fTDD\u306f\u3001\u3088\u308a\u826f\u3044\u8a2d\u8a08\u3068\u30b3\u30fc\u30c9\u54c1\u8cea\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u52b9\u679c\u7684\u306a\u624b\u6cd5\u3067\u3059\u3002\u5c0f\u3055\u306a\u6a5f\u80fd\u304b\u3089\u59cb\u3081\u3066\u3001\u30c6\u30b9\u30c8\u3092\u66f8\u304d\u306a\u304c\u3089\u6bb5\u968e\u7684\u306b\u958b\u767a\u3092\u9032\u3081\u3066\u3044\u304f\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u5805\u7262\u306a\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-27\">\u307e\u3068\u3081\uff1aJUnit\u3067\u5b9f\u73fe\u3059\u308b\u9ad8\u54c1\u8cea\u306aJava\u30c6\u30b9\u30c8<\/h2>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u304a\u3051\u308b\u6700\u3082\u91cd\u8981\u306a\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308bJUnit\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u7684\u306a\u5185\u5bb9\u307e\u3067\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u5b66\u3093\u3060\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u8a18\u4e8b\u306e\u8981\u70b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>JUnit\u306e\u57fa\u672c<\/strong>\n<ul class=\"wp-block-list\">\n<li>Java\u958b\u767a\u306b\u304a\u3051\u308b\u6a19\u6e96\u7684\u306a\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/li>\n\n\n\n<li>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u30d9\u30fc\u30b9\u306e\u76f4\u611f\u7684\u306aAPI<\/li>\n\n\n\n<li>\u8c4a\u5bcc\u306a\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u7fa4<\/li>\n\n\n\n<li>IDE\u3068\u306e\u512a\u308c\u305f\u7d71\u5408\u6027<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \/\/ \u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\u306e\u69cb\u9020\n   @Test\n   void testMethod() {\n       \/\/ \u6e96\u5099\uff08Arrange\uff09\n       Calculator calc = new Calculator();\n\n       \/\/ \u5b9f\u884c\uff08Act\uff09\n       int result = calc.add(2, 3);\n\n       \/\/ \u691c\u8a3c\uff08Assert\uff09\n       assertEquals(5, result);\n   }<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u958b\u767a\u52b9\u7387\u3092\u9ad8\u3081\u308b\u6a5f\u80fd<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8<\/li>\n\n\n\n<li>\u30e2\u30c3\u30af\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406<\/li>\n\n\n\n<li>\u8c4a\u5bcc\u306a\u62e1\u5f35\u6a5f\u80fd<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u5b9f\u8df5\u306b\u5411\u3051\u305f\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u5fc3\u8005\u30b9\u30c6\u30fc\u30b8<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30b7\u30f3\u30d7\u30eb\u306a\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>IDE\u4e0a\u3067\u306e\u30c6\u30b9\u30c8\u5b9f\u884c<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4e2d\u7d1a\u8005\u30b9\u30c6\u30fc\u30b8<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30e2\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u306e\u6539\u5584<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4e0a\u7d1a\u8005\u30b9\u30c6\u30fc\u30b8<\/strong>\n<ul class=\"wp-block-list\">\n<li>TDD\u306e\u5b9f\u8df5<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>CI\/CD\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u69cb\u7bc9<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u4eca\u5f8c\u306e\u767a\u5c55\u306b\u5411\u3051\u3066<\/h3>\n\n\n<div id=\"id-2f451084-16ea-4001-9488-0635584fae6e\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u63a8\u5968\u3055\u308c\u308b\u5b66\u7fd2\u9805\u76ee<\/th><th>\u76ee\u7684<\/th><th>\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/th><\/tr><\/thead><tbody><tr><td>\u30e2\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/td><td>\u5916\u90e8\u4f9d\u5b58\u306e\u5206\u96e2<\/td><td>Mockito\u306e\u5b66\u7fd2<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u30c4\u30fc\u30eb<\/td><td>\u54c1\u8cea\u30e1\u30c8\u30ea\u30af\u30b9\u306e\u6e2c\u5b9a<\/td><td>JaCoCo\u306e\u5c0e\u5165<\/td><\/tr><tr><td>CI\/CD\u30c4\u30fc\u30eb<\/td><td>\u81ea\u52d5\u30c6\u30b9\u30c8\u306e\u5b9f\u73fe<\/td><td>Jenkins\/GitHubActions\u306e\u8a2d\u5b9a<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><strong>\u6700\u7d42\u7684\u306a\u30a2\u30c9\u30d0\u30a4\u30b9<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6bb5\u968e\u7684\u306a\u5c0e\u5165<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5c0f\u3055\u306a\u30c6\u30b9\u30c8\u304b\u3089\u59cb\u3081\u308b<\/li>\n\n\n\n<li>\u5f90\u3005\u306b\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u3092\u5411\u4e0a<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u5168\u4f53\u3067\u30c6\u30b9\u30c8\u6587\u5316\u3092\u91b8\u6210<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7d99\u7d9a\u7684\u306a\u6539\u5584<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u5b9a\u671f\u7684\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/li>\n\n\n\n<li>\u65b0\u3057\u3044JUnit\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u6a5f\u80fd\u628a\u63e1<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30d1\u30bf\u30fc\u30f3\u306e\u84c4\u7a4d\u3068\u5171\u6709<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u54c1\u8cea\u91cd\u8996\u306e\u59ff\u52e2<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u3092\u5f8c\u56de\u3057\u306b\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u30c6\u30b9\u30c8\u3082\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>JUnit\u306e\u9069\u5207\u306a\u6d3b\u7528\u306f\u3001Java\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u54c1\u8cea\u3068\u4fdd\u5b88\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u305f\u5185\u5bb9\u3092\u5b9f\u8df5\u306b\u6d3b\u304b\u3057\u3001\u3088\u308a\u826f\u3044\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u3092\u76ee\u6307\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u304b\u3089\u30c6\u30b9\u30c8\u3092\u59cb\u3081\u308b\u65b9\u3082\u3001\u3059\u3067\u306b\u30c6\u30b9\u30c8\u3092\u66f8\u3044\u3066\u3044\u308b\u65b9\u3082\u3001\u3053\u306e\u8a18\u4e8b\u304c\u7686\u69d8\u306e\u30c6\u30b9\u30c8\u958b\u767a\u306e\u4e00\u52a9\u3068\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: 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