Question

我开始使用Espresso，并且当用户输入错误时我会显示自定义吐司（我知道我可以使用EditText.setError（），但是那个＆＃39; s就是这样）。

这是Toast的代码

 private static void showToast(Context context, String message, boolean isError) {
        if (context != null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            TextView toastView = (TextView) inflater.inflate(R.layout.error_toast_layout, null);
            if (!isError) {
                toastView.setBackgroundColor(context.getResources().getColor(R.color.alert_positive));
            }
            toastView.setText(message);
            Toast errorToast = new Toast(context);
            errorToast.setGravity(Gravity.TOP, 0, 0);
            errorToast.setDuration(Toast.LENGTH_SHORT);
            errorToast.setView(toastView);
            errorToast.show();
        }
    }

我正在写一个小小的UI测试，断言当用户输入错误的输入时会显示正确的Toasts

这是测试

   @RunWith(AndroidJUnit4.class)
    @LargeTest
    public class ForgotPasswordTest extends BaseEspressoTest<ForgotPasswordActivity> {

        @Test
        public void testEmailNotEntered() {
            onView(withId(R.id.email_et)).perform(typeText("w"), closeSoftKeyboard());
            onView(withId(R.id.btn_submit)).perform(click());
            onView(withText(R.string.incorrect_email_dialog)).inRoot(withDecorView(not(mActivityRule.getActivity().getWindow().getDecorView()))).check(matches(isDisplayed()));     
    }
}

如果我将自定义Toast替换为常规Toast，这可以正常工作，但是当我尝试使用它时失败。我可以看到在测试过程中正在显示Toast。

这是错误：

android.support.test.espresso.NoMatchingRootException：Matcher＆＃39; with 装饰视图不是＆＃39;不匹配以下任何一项根源： [Root{application-window-token=android.view.ViewRootImpl$W@2d629b84， window-token=android.view.ViewRootImpl$W@2d629b84， has-window-focus = true，layout-params-type = 1， layout-params-string = WM.LayoutParams {（0,0）（fillxfill）sim =＃22 ty = 1 fl =＃8d810100 pfl = 0x8 wanim = 0x1030461 surfaceInsets = Rect（0,0 - 0,0）}， decor-view-string = DecorView {id = -1，visibility = VISIBLE，width = 1080， height = 1920，has-focus = true，has-focusable = true， has-window-focus = true，is-clickable = false，is-enabled = true， is-focused = false，is-focusable = false，is-layout-requested = false， is-selected = false，root-is-layout-requested = false， has-input-connection = false，x = 0.0，y = 0.0，child-count = 1}}]

我也试图根据它应该关注的事实来匹配Toast：

onView(withText(R.string.incorrect_email_dialog)).inRoot(isFocusable()).check(matches(isDisplayed()));

但这只是说它无法在视图层次结构中找到它：

找不到层次结构中的视图匹配：来自资源ID的字符串：＆lt; 2131165635＆gt; [incorrect_email_dialog]值：请输入有效的电子邮件

Answer 1

您可以尝试使用下面给出的CustomToastMatcher：

500 Internal Server Error

在测试用例中使用它：

import android.os.IBinder;
import android.support.test.espresso.Root;
import android.view.WindowManager;
import org.hamcrest.Description;
import org.hamcrest.TypeSafeMatcher;

    public class ToastMatcher extends TypeSafeMatcher<Root> {

        @Override    public void describeTo(Description description) {
            description.appendText("is toast");
        }

        @Override    public boolean matchesSafely(Root root) {
            int type = root.getWindowLayoutParams().get().type;
            if ((type == WindowManager.LayoutParams.TYPE_TOAST)) {
                IBinder windowToken = root.getDecorView().getWindowToken();
                IBinder appToken = root.getDecorView().getApplicationWindowToken();
                if (windowToken == appToken) {
                  //means this window isn't contained by any other windows. 
                }
            }
            return false;
        }
    }

其他参考文献： https://stackoverflow.com/a/33387980/2069407 http://baroqueworksdev.blogspot.de/2015/03/how-to-check-toast-window-on-android.html

NoMatchingRootException Espresso与自定义Toast

1 个答案: