Junit 验证exception的几种方法_junit exception

try - catch

@Test
public void testInvalidData() {
    prepareTestData();
 
    try {
        userService.fetchUser(1234);
        Assert.fail("IllegalArgumentException not thrown");
    } catch (IllegalArgumentException expected) {
    }
}

Annotation Attribute

@Test(expected = IllegalArgumentException.class)
public void testInvalidData() {
    prepareTestData();
 
    // should throw IllegalArgumentException
    userService.fetchUser(1234);
}

Junit5 以后不再有这个feature

Rule ExpectedException

@Rule
public ExpectedException thrown = ExpectedException.none();
 
@Test
public void testInvalidData() {
    prepareTestData();
 
    thrown.expect(IllegalArgumentException.class);
    userService.fetchUser(1234);
}

JUnit 4 contains the built-in rule ExpectedException. (plea