类对象NotAMockException上的Mockito验证

Question

我试图为以下静态方法编写一个测试：

public static Field getField (Class<?> type, String fieldName) {
    for (Field field : type.getDeclaredFields()) {
        if (field.getName().equals(fieldName)) {
            return field;
        }
    }

    if (type.getSuperclass() != null) {
        return getField(type.getSuperclass(), fieldName);
    }

    return null;
}

@Test
public void getFieldTest () {
    class StupidObject { Object stupidField; }
    class ReallyStupidObject extends StupidObject { Object reallyStupidField; }
    ReallyStupidObject reallyStupidObject = mock(ReallyStupidObject.class);
    // --------------------------------------------------
    Field field = FSUtils.getField(reallyStupidObject.getClass(), "stupidField");
    // --------------------------------------------------
    verify(reallyStupidObject.getClass()).getDeclaredFields();
    verify(reallyStupidObject.getClass()).getSuperclass();
    verify(reallyStupidObject.getClass().getSuperclass()).getDeclaredFields();
    verify(reallyStupidObject.getClass().getSuperclass(), never()).getSuperclass();
    assertEquals(field.getName(), "stupidField");
}

多谢！

本。

Answer 1

这似乎不是一个应该用嘲笑来解决的问题。我会选择这样一个具体的测试：

@Test
public void getFieldTest() {
    class StupidObject { Object stupidField; }
    class ReallyStupidObject extends StupidObject { Object reallyStupidField; }

    // test the right field is found in the right class
    testFieldFind("stupidField", ReallyStupidObject.class,
            StupidObject.class);
    testFieldFind("reallyStupidField", ReallyStupidObject.class,
            ReallyStupidObject.class);

    // check that non-existent fields return null
    assertNull(FSUtils.getField(ReallyStupidObject.class, "fooballs"));
}

private static void testFieldFind(String fieldName, Class<?> classToSearch,
        Class<?> expectedDeclaringClass) {
    Field field = FSUtils.getField(classToSearch, fieldName);
    assertEquals(fieldName, field.getName());
    assertEquals(expectedDeclaringClass, field.getDeclaringClass());
}

至于原始代码失败的原因--必须对模拟对象调用verify，即verify(reallyStupidObject).doSomething()。