如何使用 jMockit 和 TestNG 在最终 class 中验证对 static 方法的调用？

Question

How do I verify a call to a static method in a final class using jMockit?

In PowerMockito, this isn't possible because the class is final. If this can't be done using jMockit, what are the alternatives?

Answer 1

You should be able to do it in PowerMockito, yes.

Anyway, in JMockit, you usually would write a verification block like the following:

@Test
public void exampleTest(@Mocked AFinalClass mock)
{
    // Call the code under test which uses AFinalClass.

    new Verifications() {{ AFinalClass.someStaticMethod(); }};
}

Answer 2

Below is my version based on @Mocked and MockUp

public class Util {
    static {
        // static initializer
    }

    public static void doSomething(String arg) {
        // do something
    }
}

public class SomeTest {
    @Test
    public void testDoSomething(@Mocked Util util) {
        // NOTE: need to move the `MockUp` to @BeforeClass method if you want to mock the static initializer
        new MockUp<Util>() {
            @Mock
            void $clinit() {
                // do nothing
            }

            @Mock
            void doSomething(String arg) {
                // mock doSomething
            }
        };

        // action to test

        // verify
        new Verifications() {{
            String arg;
            Util.doSomething(arg = withCapture());
            assertEquals("expected", arg);
        }};
    }
}