JUnit @Before and @After executing before and after every test

Question

I am running JUnit tests that test a Spring Boot application. I have a @Before method and an @After one. Then I have a bunch of @Test methods which are the actual tests.

However, my @Before and @After methods execute before and after each test, respectively, instead of executing once before all the tests, and once after all the tests.

Could it be that I'm also using this annotation?

@FixMethodOrder(MethodSorters.NAME_ASCENDING)

Solution 1

This is the normal behaviour of @Before and @After. Quoting the documentation of @Before, for example:

Annotating a public void method with @Before causes that method to be run before the Test method.

If you want to run a method only once before and after all the tests, you can use @BeforeClass and @AfterClass. Quoting the documentation of @BeforeClass for example:

Annotating a public static void no-arg method with @BeforeClass causes it to be run once before any of the test methods in the class.

Solution 2

That is exactly what @Before and @After are 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 static and take no arguments.