[Accessibility] Add contrast control screen UI and setup entry point

Bug: 241805782
Test: atest, local raven device
Screenshot: attached on bug
Flag: aconfig
com.android.settings.accessibility.enable_color_contrast_control

Change-Id: I7fcc01b822b460c6585c41a5831575ba0ffbcc93

tests/robotests/src/com/android/settings/accessibility/ColorContrastFragmentTest.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2024 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.accessibility;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.app.UiModeManager;
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+import com.android.settings.testutils.XmlTestUtils;
+
+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 java.util.List;
+
+/** Tests for {@link ColorContrastFragment}. */
+@RunWith(RobolectricTestRunner.class)
+public class ColorContrastFragmentTest {
+
+    private ColorContrastFragment mFragment;
+    private Context mContext;
+    @Mock
+    private UiModeManager mUiService;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mFragment = spy(new ColorContrastFragment());
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mFragment.getContext()).thenReturn(mContext);
+        when(mContext.getSystemService(UiModeManager.class)).thenReturn(mUiService);
+    }
+
+    @Test
+    public void getMetricsCategory_returnsCorrectCategory() {
+        assertThat(mFragment.getMetricsCategory()).isEqualTo(0);
+    }
+
+    @Test
+    public void getPreferenceScreenResId_returnsCorrectXml() {
+        assertThat(mFragment.getPreferenceScreenResId()).isEqualTo(
+                R.xml.accessibility_color_contrast);
+    }
+
+    @Test
+    public void getLogTag_returnsCorrectTag() {
+        assertThat(mFragment.getLogTag()).isEqualTo("ColorContrastFragment");
+    }
+
+    @Test
+    public void getNonIndexableKeys_existInXmlLayout() {
+        final List<String> niks =
+                ShortcutsSettingsFragment.SEARCH_INDEX_DATA_PROVIDER
+                        .getNonIndexableKeys(mContext);
+        final List<String> keys =
+                XmlTestUtils.getKeysFromPreferenceXml(mContext,
+                        R.xml.accessibility_color_contrast);
+        assertThat(keys).containsAtLeastElementsIn(niks);
+    }
+}

tests/robotests/src/com/android/settings/accessibility/ContrastPreferenceControllerTest.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2024 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.accessibility;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.platform.test.flag.junit.CheckFlagsRule;
+import android.platform.test.flag.junit.DeviceFlagsValueProvider;
+import android.platform.test.flag.junit.SetFlagsRule;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.core.BasePreferenceController;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+/** Tests for {@link ContrastPreferenceController}. */
+@RunWith(RobolectricTestRunner.class)
+public class ContrastPreferenceControllerTest {
+
+    @Rule
+    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();
+    @Rule public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();
+
+    private static final String PREFERENCE_KEY = "preference_key";
+
+    private Context mContext;
+    private ContrastPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        mContext = ApplicationProvider.getApplicationContext();
+        mController = new ContrastPreferenceController(mContext, PREFERENCE_KEY);
+    }
+
+    @Test
+    public void getAvailabilityStatus_flagsEnabled_shouldReturnAvailable() {
+        mSetFlagsRule.enableFlags(Flags.FLAG_ENABLE_COLOR_CONTRAST_CONTROL);
+
+        assertThat(mController.getAvailabilityStatus())
+                .isEqualTo(BasePreferenceController.AVAILABLE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_flagsDisabled_shouldReturnUnsupported() {
+        mSetFlagsRule.disableFlags(Flags.FLAG_ENABLE_COLOR_CONTRAST_CONTROL);
+
+        assertThat(mController.getAvailabilityStatus())
+                .isEqualTo(BasePreferenceController.UNSUPPORTED_ON_DEVICE);
+    }
+}

tests/robotests/src/com/android/settings/accessibility/ContrastSelectorPreferenceControllerTest.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2024 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.accessibility;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.UiModeManager;
+import android.content.Context;
+import android.widget.FrameLayout;
+
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.widget.LayoutPreference;
+
+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 java.util.concurrent.Executor;
+
+/** Tests for {@link ContrastSelectorPreferenceController}. */
+@RunWith(RobolectricTestRunner.class)
+public class ContrastSelectorPreferenceControllerTest {
+
+    private static final String PREFERENCE_KEY = "color_contrast_selector";
+
+    @Mock
+    private UiModeManager mUiService;
+    @Mock
+    private Executor mExecutor;
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private FrameLayout mFrameLayout;
+    @Mock
+    private LayoutPreference mLayoutPreference;
+    private Context mContext;
+    private ContrastSelectorPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mContext.getMainExecutor()).thenReturn(mExecutor);
+        when(mContext.getSystemService(UiModeManager.class)).thenReturn(mUiService);
+        mController = new ContrastSelectorPreferenceController(mContext, PREFERENCE_KEY);
+        when(mScreen.findPreference(PREFERENCE_KEY)).thenReturn(mLayoutPreference);
+        when(mLayoutPreference.findViewById(anyInt())).thenReturn(mFrameLayout);
+    }
+
+    @Test
+    public void getAvailabilityStatus_byDefault_shouldReturnAvailable() {
+        assertThat(mController.getAvailabilityStatus())
+                .isEqualTo(BasePreferenceController.AVAILABLE);
+    }
+
+    @Test
+    public void onStart_shouldAddContrastListener() {
+        mController.displayPreference(mScreen);
+        mController.onStart();
+
+        verify(mUiService).addContrastChangeListener(mExecutor, mController);
+    }
+
+    @Test
+    public void onStop_shouldRemoveContrastListener() {
+        mController.displayPreference(mScreen);
+        mController.onStart();
+        mController.onStop();
+
+        verify(mUiService).removeContrastChangeListener(mController);
+    }
+
+    @Test
+    public void displayPreference_shouldAddClickListener() {
+        mController.displayPreference(mScreen);
+
+        verify(mFrameLayout, times(3)).setOnClickListener(any());
+    }
+
+    @Test
+    public void onContrastChanged_buttonShouldBeSelected() {
+        mController.displayPreference(mScreen);
+        mController.onContrastChanged(1);
+
+        verify(mFrameLayout, times(2)).setSelected(true);
+    }
+}