| /* |
| * Copyright (C) 2016 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.widget; |
| |
| import android.os.Parcelable; |
| import android.support.v4.view.PagerAdapter; |
| import android.text.TextUtils; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import com.android.settings.testutils.SettingsRobolectricTestRunner; |
| import com.android.settings.TestConfig; |
| import com.android.settings.testutils.shadow.ShadowTextUtils; |
| import java.util.Locale; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.annotation.Config; |
| import org.robolectric.shadows.ShadowApplication; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| @RunWith(SettingsRobolectricTestRunner.class) |
| @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION) |
| public class RtlCompatibleViewPagerTest { |
| |
| private Locale mLocaleEn; |
| private Locale mLocaleHe; |
| private RtlCompatibleViewPager mViewPager; |
| |
| @Before |
| public void setUp() { |
| mViewPager = new RtlCompatibleViewPager( |
| ShadowApplication.getInstance().getApplicationContext()); |
| mViewPager.setAdapter(new ViewPagerAdapter()); |
| mLocaleEn = new Locale("en"); |
| mLocaleHe = new Locale("he"); |
| } |
| |
| @Test |
| @Config(shadows = {ShadowTextUtils.class}) |
| public void testGetCurrentItem_shouldMaintainIndexDuringLocaleChange() { |
| testRtlCompatibleInner(0); |
| testRtlCompatibleInner(1); |
| } |
| |
| private void testRtlCompatibleInner(int currentItem) { |
| // Set up the environment |
| Locale.setDefault(mLocaleEn); |
| mViewPager.setCurrentItem(currentItem); |
| |
| assertThat(TextUtils.getLayoutDirectionFromLocale(Locale.getDefault())) |
| .isEqualTo(View.LAYOUT_DIRECTION_LTR); |
| assertThat(mViewPager.getCurrentItem()).isEqualTo(currentItem); |
| |
| // Simulate to change the language to RTL |
| Parcelable savedInstance = mViewPager.onSaveInstanceState(); |
| Locale.setDefault(mLocaleHe); |
| mViewPager.onRestoreInstanceState(savedInstance); |
| |
| assertThat(TextUtils.getLayoutDirectionFromLocale(Locale.getDefault())) |
| .isEqualTo(View.LAYOUT_DIRECTION_RTL); |
| assertThat(mViewPager.getCurrentItem()).isEqualTo(currentItem); |
| } |
| |
| /** |
| * Test viewpager adapter, uses 2 view to test it |
| */ |
| private static final class ViewPagerAdapter extends PagerAdapter { |
| |
| private static final int ITEM_COUNT = 2; |
| |
| public ViewPagerAdapter() { |
| } |
| |
| @Override |
| public int getCount() { |
| return ITEM_COUNT; |
| } |
| |
| @Override |
| public boolean isViewFromObject(View view, Object object) { |
| return view == object; |
| } |
| |
| @Override |
| public Object instantiateItem(ViewGroup container, int position) { |
| return null; |
| } |
| |
| @Override |
| public CharSequence getPageTitle(int position) { |
| return null; |
| } |
| } |
| } |