android - 在 Android 上使用 Espresso 测试 EditText 错误

Question

我想测试 EditText 字段是否有错误(使用 editText.setError("Cannot be blank!") 设置)。

我使用新的 AndroidStudio 2.2 功能创建了一个 Espresso 测试用例，以记录 Espresso 测试。所以代码几乎是自动生成的。但现在它只检查是否显示了 editText。

@RunWith(AndroidJUnit4.class)
public class CreateNoteActivityTitleCannotBeBlank {

    @Rule
    public ActivityTestRule<CreateNoteActivity> mActivityTestRule = new ActivityTestRule<>(CreateNoteActivity.class);

    @Test
    public void createNoteActivityTitleCannotBeBlank() {
        ViewInteraction floatingActionButton = onView(
                allOf(withId(R.id.fab_add_note),
                        withParent(allOf(withId(R.id.activity_create_note),
                                withParent(withId(android.R.id.content)))),
                        isDisplayed()));
        floatingActionButton.perform(click());

        ViewInteraction editText = onView(
                allOf(withId(R.id.tiet_note_title),
                        childAtPosition(
                                childAtPosition(
                                        withId(R.id.til_title),
                                        0),
                                0),
                        isDisplayed()));
        editText.check(matches(isDisplayed()));

    }

    private static Matcher<View> childAtPosition(
            final Matcher<View> parentMatcher, final int position) {

        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("Child at position " + position + " in parent ");
                parentMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                ViewParent parent = view.getParent();
                return parent instanceof ViewGroup && parentMatcher.matches(parent)
                        && view.equals(((ViewGroup) parent).getChildAt(position));
            }
        };
    }
}

有没有办法测试是否显示错误？

Answer 1

您将 editText.check(matches(isDisplayed())); 更改为 editText.check(matches(hasErrorText("Cannot be blank!")));