updater_sample/tests/src/com/example/android/systemupdatersample/ui/MainActivityTest.java

/*
 * Copyright (C) 2018 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.systemupdatersample.ui;

import static org.junit.Assert.assertNotNull;

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;

/**
 * Make sure that the main launcher activity opens up properly, which will be
 * verified by {@link #activityLaunches}.
 */
@RunWith(AndroidJUnit4.class)
@MediumTest
public class MainActivityTest {

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

    /**
     * Verifies that the activity under test can be launched.
     */
    @Test
    public void activityLaunches() {
        assertNotNull(mActivityRule.getActivity());
    }
}