Add the preference controller to control accessibility button opacity preference

cherry picked from commit c497c7aabe

Bug: 173940869
Test: atest FloatingMenuOpacityPreferenceControllerTest
Change-Id: I1fbe3157c93fef4611c3b9b13569c9b339e2898a
Merged-In: I1fbe3157c93fef4611c3b9b13569c9b339e2898a

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

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2021 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 android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU;
+import static android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR;
+
+import static com.android.settings.accessibility.FloatingMenuOpacityPreferenceController.DEFAULT_OPACITY;
+import static com.android.settings.accessibility.FloatingMenuOpacityPreferenceController.PRECISION;
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.DISABLED_DEPENDENT_SETTING;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.widget.SeekBarPreference;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+
+/** Tests for {@link FloatingMenuOpacityPreferenceController}. */
+@RunWith(RobolectricTestRunner.class)
+public class FloatingMenuOpacityPreferenceControllerTest {
+
+    @Rule
+    public MockitoRule mocks = MockitoJUnit.rule();
+
+    @Spy
+    private final Context mContext = ApplicationProvider.getApplicationContext();
+    @Mock
+    private ContentResolver mContentResolver;
+    private FloatingMenuOpacityPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        when(mContext.getContentResolver()).thenReturn(mContentResolver);
+        mController = new FloatingMenuOpacityPreferenceController(mContext, "test_key");
+    }
+
+    @Test
+    public void getAvailabilityStatus_a11yBtnModeFloatingMenu_returnAvailable() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_a11yBtnModeNavigationBar_returnDisabledDependentSetting() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(DISABLED_DEPENDENT_SETTING);
+    }
+
+    @Test
+    public void onChange_a11yBtnModeChangeToNavigationBar_preferenceDisabled() {
+        mController.mPreference = new SeekBarPreference(mContext);
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+
+        mController.mContentObserver.onChange(false);
+
+        assertThat(mController.mPreference.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void getSliderPosition_putNormalOpacityValue_expectedValue() {
+        Settings.Secure.putFloat(mContext.getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_OPACITY, 0.35f);
+
+        assertThat(mController.getSliderPosition()).isEqualTo(35);
+    }
+
+    @Test
+    public void getSliderPosition_putOutOfBoundOpacityValue_defaultValue() {
+        Settings.Secure.putFloat(mContext.getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_OPACITY, 0.01f);
+
+        final int defaultValue = Math.round(DEFAULT_OPACITY * PRECISION);
+        assertThat(mController.getSliderPosition()).isEqualTo(defaultValue);
+    }
+
+    @Test
+    public void setSliderPosition_expectedValue() {
+        mController.setSliderPosition(27);
+
+        final float value = Settings.Secure.getFloat(mContext.getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_OPACITY, -1);
+        assertThat(value).isEqualTo(0.27f);
+    }
+
+    @Test
+    public void onResume_registerSpecificContentObserver() {
+        mController.onResume();
+
+        verify(mContentResolver).registerContentObserver(
+                Settings.Secure.getUriFor(Settings.Secure.ACCESSIBILITY_BUTTON_MODE), false,
+                mController.mContentObserver);
+    }
+
+    @Test
+    public void onPause_unregisterContentObserver() {
+        mController.onPause();
+
+        verify(mContentResolver).unregisterContentObserver(mController.mContentObserver);
+    }
+}