Android JUnit：如何使异常导致测试用例通过（@Test注释）

Question

I'm trying to write some JUnit tests for an Android application.

I've read online that to have a unit test pass if it throws an exception, you would use the @Test annotation like this

@Test(expected = NullPointerException.class)
public void testNullValue() throws Throwable
{
    Object o = null;
    o.toString();
}

but Eclipse is telling me that this annotation doesn't exist. How can I fix this? If I run the test, it runs fine and fails as expected but obviously I want it to fail (and thus actually pass) :)

Answer 1

You can always bypass it manually:

public void testNullValue()
{
    try {
       Object o = null;
       o.toString();
       fail("Expected NullPointerException to be thrown");
    } catch (NullPointerException e) {
       assertTrue(true);
    }
}

Answer 2

我认为应该是：

@Test(expected=NullPointerException.class)

Answer 3

1. Double check the JUnit version you are using
2. Do not use the JUnit that eclipse provides (Indigo) but import manually a JUnit 4.9 manually

The error is that "mysterious" error that has not an easy or immediate answer, I am only trying ideas