Robolectric测试中的“java.lang.AssertionError：预期可见但不可见”

Question

为什么以下测试会因标题中给出的错误而失败？

@RunWith(RobolectricTestRunner.class)
public class MainActivityTest {

    private MainActivity mActivity;

    @Before
    public void setUp() {
        mActivity = Robolectric.buildActivity(MainActivity.class).create().get();
    }

    @Test
    public void testBaseballCardDetails() {
        FragmentManager fm = mActivity.getSupportFragmentManager();
        Fragment fragment = fm.findFragmentByTag(FragmentTags.EDIT_CARD);

        assertThat(fragment).isNotNull().isAdded().isVisible();
    }

}

Answer 1

我似乎需要在visible()上致电ActivityController：

mActivity = Robolectric.buildActivity(MainActivity.class).create().visible().get();