Assertion methods are throwing a "java.lang.AssertionError". If this call is done within the try block of a try-catch cathing a
similar error, you should make sure to test some properties of the exception. Otherwise, the assertion will never fail.
Noncompliant code example
@Test
public void should_throw_assertion_error() {
try {
throwAssertionError();
Assert.fail("Expected an AssertionError!"); // Noncompliant, the AssertionError will be caught and the test will never fail.
} catch (AssertionError e) {}
}
private void throwAssertionError() {
throw new AssertionError("My assertion error");
}
Compliant solution
assertThrows(AssertionError.class, () -> throwAssertionError());
try {
throwAssertionError();
Assert.fail("Expected an AssertionError!"); // Compliant, we made sure to test that the correct error is raised
} catch (AssertionError e) {
Assert.assertThat(e.getMessage(), is("My assertion error"));
}
