JUnit Nested Test:按场景组织测试层次

  [Shop 整个类]
      构造 Shop #1
        @BeforeEach Shop(外层)#1
          测试 shopTest(外层)#1
        @AfterEach  Shop(外层)#1
      构造 Shop #2
        @BeforeEach Shop(外层)#2
          测试 EmptyCart.total
        @AfterEach  Shop(外层)#2
      构造 Shop #3
      构造 WithCart #4(外层 Shop #3)
        @BeforeEach Shop(外层)#3
        @BeforeEach WithCart(第 2 层)#4
          测试 cartTest(第 2 层)#4
        @AfterEach  WithCart(第 2 层)#4
        @AfterEach  Shop(外层)#3
      构造 Shop #5
      构造 WithCart #6(外层 Shop #5)
      构造 WithItem #7(外层 WithCart #6,最外层 Shop #5)
        @BeforeEach Shop(外层)#5
        @BeforeEach WithCart(第 2 层)#6
        @BeforeEach WithItem(第 3 层)#7
          测试 itemTest1(第 3 层)#7
        @AfterEach  WithItem(第 3 层)#7
        @AfterEach  WithCart(第 2 层)#6
        @AfterEach  Shop(外层)#5
      构造 Shop #8
      构造 WithCart #9(外层 Shop #8)
      构造 WithItem #10(外层 WithCart #9,最外层 Shop #8)
        @BeforeEach Shop(外层)#8
        @BeforeEach WithCart(第 2 层)#9
        @BeforeEach WithItem(第 3 层)#10
          测试 itemTest2(第 3 层)#10
        @AfterEach  WithItem(第 3 层)#10
        @AfterEach  WithCart(第 2 层)#9
        @AfterEach  Shop(外层)#8
      → 5 tests found | 0 tests skipped | 5 tests successful | 0 tests failed
  汇总:共 5 个测试方法被执行;@BeforeEach 总共执行 10 次;构造函数总共被调用 10 次;外层 Shop 被构造 5 次

  [tree 输出]
      构造 Shop #1
        @BeforeEach Shop(外层)#1
          测试 shopTest(外层)#1
        @AfterEach  Shop(外层)#1
      构造 Shop #2
        @BeforeEach Shop(外层)#2
          测试 EmptyCart.total
        @AfterEach  Shop(外层)#2
      构造 Shop #3
      构造 WithCart #4(外层 Shop #3)
        @BeforeEach Shop(外层)#3
        @BeforeEach WithCart(第 2 层)#4
          测试 cartTest(第 2 层)#4
        @AfterEach  WithCart(第 2 层)#4
        @AfterEach  Shop(外层)#3
      构造 Shop #5
      构造 WithCart #6(外层 Shop #5)
      构造 WithItem #7(外层 WithCart #6,最外层 Shop #5)
        @BeforeEach Shop(外层)#5
        @BeforeEach WithCart(第 2 层)#6
        @BeforeEach WithItem(第 3 层)#7
          测试 itemTest1(第 3 层)#7
        @AfterEach  WithItem(第 3 层)#7
        @AfterEach  WithCart(第 2 层)#6
        @AfterEach  Shop(外层)#5
      构造 Shop #8
      构造 WithCart #9(外层 Shop #8)
      构造 WithItem #10(外层 WithCart #9,最外层 Shop #8)
        @BeforeEach Shop(外层)#8
        @BeforeEach WithCart(第 2 层)#9
        @BeforeEach WithItem(第 3 层)#10
          测试 itemTest2(第 3 层)#10
        @AfterEach  WithItem(第 3 层)#10
        @AfterEach  WithCart(第 2 层)#9
        @AfterEach  Shop(外层)#8
      → 5 tests found | 0 tests skipped | 5 tests successful | 0 tests failed
        ├─ JUnit Platform Suite ✔
        ├─ JUnit Jupiter ✔
        │  └─ Shop ✔
        │     ├─ shopTest() ✔
        │     ├─ 空购物车 ✔
        │     │  └─ 总价为 0 ✔
        │     └─ WithCart ✔
        │        ├─ cartTest() ✔
        │        └─ WithItem ✔
        │           ├─ itemTest1() ✔
        │           └─ itemTest2() ✔
        └─ JUnit Vintage ✔
  想只运行嵌套类里的一部分,控制台启动器的几种选择方式的结果:
  [--select-class Shop$WithCart$WithItem(直接选择最内层类)]
      → 0 tests found | 0 tests skipped | 0 tests successful | 0 tests failed
  [--select-method Shop$WithCart#cartTest]
      → 0 tests found | 0 tests skipped | 0 tests successful | 0 tests failed
  [--select-class Shop --include-classname '.*WithItem']
      构造 Shop #1
        @BeforeEach Shop(外层)#1
          测试 shopTest(外层)#1
        @AfterEach  Shop(外层)#1
      构造 Shop #2
        @BeforeEach Shop(外层)#2
          测试 EmptyCart.total
        @AfterEach  Shop(外层)#2
      构造 Shop #3
      构造 WithCart #4(外层 Shop #3)
        @BeforeEach Shop(外层)#3
        @BeforeEach WithCart(第 2 层)#4
          测试 cartTest(第 2 层)#4
        @AfterEach  WithCart(第 2 层)#4
        @AfterEach  Shop(外层)#3
      构造 Shop #5
      构造 WithCart #6(外层 Shop #5)
      构造 WithItem #7(外层 WithCart #6,最外层 Shop #5)
        @BeforeEach Shop(外层)#5
        @BeforeEach WithCart(第 2 层)#6
        @BeforeEach WithItem(第 3 层)#7
          测试 itemTest1(第 3 层)#7
        @AfterEach  WithItem(第 3 层)#7
        @AfterEach  WithCart(第 2 层)#6
        @AfterEach  Shop(外层)#5
      构造 Shop #8
      构造 WithCart #9(外层 Shop #8)
      构造 WithItem #10(外层 WithCart #9,最外层 Shop #8)
        @BeforeEach Shop(外层)#8
        @BeforeEach WithCart(第 2 层)#9
        @BeforeEach WithItem(第 3 层)#10
          测试 itemTest2(第 3 层)#10
        @AfterEach  WithItem(第 3 层)#10
        @AfterEach  WithCart(第 2 层)#9
        @AfterEach  Shop(外层)#8
      → 5 tests found | 0 tests skipped | 5 tests successful | 0 tests failed
  [--select-class Shop --include-tag nonexistent(对照:标签过滤)]
      → 0 tests found | 0 tests skipped | 0 tests successful | 0 tests failed

  [--select-class WithStatic]
          测试 WithStatic.outerTest
          测试 WithStatic.IsNested.nestedTest
      → 2 tests found | 0 tests skipped | 2 tests successful | 0 tests failed
  [--scan-class-path 且匹配 WithStatic.*]
          测试 WithStatic.NotNested.staticNestedTest(没有 @Nested 的静态嵌套类)
          测试 WithStatic.outerTest
          测试 WithStatic.IsNested.nestedTest
      → 3 tests found | 0 tests skipped | 3 tests successful | 0 tests failed

  [BeforeAllNested]
      @BeforeAll(外层,static)
          测试 outerTest
      @BeforeAll(PER_CLASS 嵌套类里的实例方法)
          测试 PerClassAll.t1 counter=1
          测试 PerClassAll.t2 counter=2
      @BeforeAll(嵌套类里的 static 方法)
          测试 StaticAll.t1
          测试 StaticAll.t2
      @AfterAll(外层,static)
      → 5 tests found | 0 tests skipped | 5 tests successful | 0 tests failed

  [ExtOuter 全部]
          测试 ExtOuter.plain
          测试 NoExt.c(没有扩展)
        扩展 beforeEach:WithExt.a()(第 1 次)
          测试 WithExt.a
        扩展 beforeEach:Deeper.b()(第 2 次)
          测试 WithExt.Deeper.b(继承了外层的 @ExtendWith 与 @Tag)
      → 5 tests found | 1 tests skipped | 4 tests successful | 0 tests failed
  [ExtOuter,--include-tag slow]
        扩展 beforeEach:WithExt.a()(第 1 次)
          测试 WithExt.a
        扩展 beforeEach:Deeper.b()(第 2 次)
          测试 WithExt.Deeper.b(继承了外层的 @ExtendWith 与 @Tag)
      → 2 tests found | 0 tests skipped | 2 tests successful | 0 tests failed
  [DisabledOuter(外层 @Disabled,里面有 @Nested)]
      → 2 tests found | 2 tests skipped | 0 tests successful | 0 tests failed