How to run @BeforeClass method before each @Test

Question

When I run my @Tests manualy, one by one - everything is fine. But when I run them all together - I`ve got an error. So how can I run @BeforeClass before each @Test. I cant use @Before becorse in my @BeforeClass I do some work in testing class constructor.

Testing class constructor:

public HttpUtils() {
    this.httpClient = HttpClients.createDefault();
}

Before class:

@BeforeClass
public static void init() throws IOException {
    mockStatic(HttpClients.class);
    final CloseableHttpClient closeableHttpClient = createMock(CloseableHttpClient.class);
    when(HttpClients.createDefault()).thenReturn(closeableHttpClient);
}

If I run all test. On second test Ive got HttpClient not like mock, but like real object, and lately have error coz of it.

`@BeforeClass` executed once and typically used to bootstrap some resource-heavy environment like embedded database or to modify classes with the magic of Reflection API. `@Before` executed before each test to do some clean up between tests. I don't believe that in your case it's impossible to organize code to do that you want using these lifecycle. — Sergey Prokofiev, Dec 11 '18 at 14:50

score 4 · Answer 1 · answered Dec 11 '18 at 14:43

4

Use @Before instead of @BeforeClass to execute before every test

@Before
public static void init() throws IOException {

with @Before causes that method to be run before the Test method. The @Before methods of superclasses will be run before those of the current class.

answered Dec 11 '18 at 14:43

Ori Marko

56,308
23
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java.lang.Exception: Method init() should not be static – Anton Kolosok Dec 11 '18 at 15:33
@AntonKolosok remove static and use `PowerMockito.mockStatic(` see https://stackoverflow.com/questions/11955270/mocking-behaviour-resets-after-each-test-with-powermock – Ori Marko Dec 11 '18 at 15:39
Still got real object, not mock – Anton Kolosok Dec 11 '18 at 17:32

score 0 · Answer 2 · answered Dec 11 '18 at 15:19

0

If you want to execute any method before each test class you should go for @Before annotation. By using @BeforeClass annotation you only call that method once in the test class.

answered Dec 11 '18 at 15:19

Viraj Wickramasinghe

13
7

How to run @BeforeClass method before each @Test

2 Answers2