Espresso：如何测试开始新活动？

Question

如果我有MainActivity和DetailActivity，我该如何测试DetailActivity是否已经启动？

public class MainScreenTest {

    @Rule
    public IntentsTestRule<MainActivity> mainActivityRule =
            new IntentsTestRule<>(MainActivity.class);

    @Test
    public void shouldOpenDetailActivityOnClick() {
        onView(withId(R.id.button)).check(matches(withText("Detail")));

        onView(withId(R.id.button))
                .perform(click());

        ...
    }

}

Answer 1

这是一种方法：

public class MainScreenTest {

    @Rule
    public IntentsTestRule<MainActivity> mainActivityRule =
            new IntentsTestRule<>(MainActivity.class);

    @Test
    public void shouldOpenDetailActivityOnClick() {
        onView(withId(R.id.button)).check(matches(withText("Detail")));

        onView(withId(R.id.button))
                .perform(click());

        intended(hasComponent("com.example.androidplayground.DetailActivity"));
    }

}