Editor

MainActivityTest.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.emojicompat;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
import static android.support.test.espresso.matcher.ViewMatchers.withText;

import android.support.annotation.StringRes;
import android.support.test.filters.MediumTest;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)
public class MainActivityTest {

@Rule
    public ActivityTestRule<MainActivity> rule = new ActivityTestRule<>(MainActivity.class);

@Test
    @MediumTest
    public void allTextsDisplayed() throws Exception {
        @StringRes final int[] resIds = {
                R.string.emoji_text_view,
                R.string.emoji_edit_text,
                R.string.emoji_button,
                R.string.regular_text_view,
                R.string.custom_text_view,
        };
        for (int resId : resIds) {
            final String text = rule.getActivity().getString(resId, MainActivity.EMOJI);
            onView(withText(text)).check(matches(isDisplayed()));
        }
    }

}