tests/robotests/src/com/android/settings/applications/appinfo/AppVersionPreferenceControllerTest.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.android.settings.applications.appinfo;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.content.pm.PackageInfo;

import androidx.preference.Preference;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;

@RunWith(RobolectricTestRunner.class)
public class AppVersionPreferenceControllerTest {

    @Mock
    private AppInfoDashboardFragment mFragment;
    @Mock
    private Preference mPreference;

    private Context mContext;
    private AppVersionPreferenceController mController;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        mContext = RuntimeEnvironment.application;
        mController = new AppVersionPreferenceController(mContext, "test_key");
        mController.setParentFragment(mFragment);
    }

    @Test
    public void updateState_shouldUpdatePreferenceSummary() {
        final PackageInfo packageInfo = mock(PackageInfo.class);
        packageInfo.versionName = "test1234";
        when(mFragment.getPackageInfo()).thenReturn(packageInfo);

        mController.updateState(mPreference);

        verify(mPreference).setSummary("version test1234");
    }
}