Java junit断言已引发异常

Question

Is one better than the other? if so, for what reasons? I am leaning towards the first because i can understand what the test is trying to much more quickly.

If so, when should one be using assertThrows() ?

@Test(expected=CustomException.class)
public void test_one() {
   execute()
}

vs.

@Test
public void test_one() {
    assertThrows(CustomException.class, () -> execute());
}

Answer 1

Lets say you have your test this way:

@Test
public void test_one() {
   execute1();
   execute2()
}

Assume you want to check CustomException thrown by execute2().

Now if you go with the first approach, and execute1() throws the CustomException test will still pass and you won't be able to know whether it was thrown by execute2() or not.

But with the second approach you can specify that you want to make sure that exception is thrown by execute2() method call, hence test will only pass when the CustomException is thrown by execute2() method.