java JUnit @Before 和 @After 在每次测试之前和之后执行
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JUnit @Before and @After executing before and after every test
提问by Kingamere
I am running JUnit tests that test a Spring Boot application. I have a @Beforemethod and an @Afterone. Then I have a bunch of @Testmethods which are the actual tests.
我正在运行测试 Spring Boot 应用程序的 JUnit 测试。我有一个@Before方法和@After一个。然后我有一堆@Test方法，它们是实际测试。
However, my @Beforeand @Aftermethods execute before and after each test, respectively, instead of executing once before all the tests, and once after all the tests.
但是，my@Before和@After方法分别在每次测试之前和之后执行，而不是在所有测试之前和所有测试之后执行一次。
Could it be that I'm also using this annotation?
难道我也在使用这个注释？
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
回答by Tunaki
This is the normal behaviour of @Beforeand @After. Quoting the documentation of @Before, for example:
这是正常的行为@Before和@After。引用 的文档@Before，例如：
Annotating a public void method with
@Beforecauses that method to be run before theTestmethod.
注释公共无效方法
@Before会导致该方法在该Test方法之前运行。
If you want to run a method only once before and after all the tests, you can use @BeforeClassand @AfterClass. Quoting the documentation of @BeforeClassfor example:
如果您想在所有测试前后只运行一次方法，您可以使用@BeforeClassand @AfterClass。引用@BeforeClass例如的文档：
Annotating a public static void no-arg method with
@BeforeClasscauses it to be run once before any of the test methods in the class.
注释 public static void no-arg 方法
@BeforeClass使其在类中的任何测试方法之前运行一次。
回答by Mureinik
That is exactly what @Beforeand @Afterare supposed to do. If you want to run some setup code before an entire test class, you should use @BeforeClass. In the same fashion, if you want to tear down after an entire test class has been executed, you should use @AfterClass. Note that the methods these two annotations are applied to should be public staticand take no arguments.
这正是@Before和@After应该做的。如果你想在整个测试类之前运行一些设置代码，你应该使用@BeforeClass. 以同样的方式，如果你想在整个测试类执行后拆除，你应该使用@AfterClass. 请注意，应用这两个注释的方法应该是public static并且不带参数。
