Introduce BluetoothSnoopLogPreferenceController

- Create new BluetoothSnoopLogPreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I1122ab1406abef429e499576c9d7bd3e9f8e537a

src/com/android/settings/development/BluetoothSnoopLogPreferenceController.java

@@ -0,0 +1,82 @@
+/*
+ * 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.development;
+
+import android.content.Context;
+import android.os.SystemProperties;
+import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+public class BluetoothSnoopLogPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
+
+    private static final String PREFERENCE_KEY = "bt_hci_snoop_log";
+    @VisibleForTesting
+    static final String BLUETOOTH_BTSNOOP_ENABLE_PROPERTY =
+            "persist.bluetooth.btsnoopenable";
+
+    private SwitchPreference mPreference;
+
+    public BluetoothSnoopLogPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREFERENCE_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean enableBtSnoopLog = (Boolean) newValue;
+        SystemProperties.set(BLUETOOTH_BTSNOOP_ENABLE_PROPERTY, Boolean.toString(enableBtSnoopLog));
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        final boolean enableBtSnoopLog = SystemProperties.getBoolean(
+                BLUETOOTH_BTSNOOP_ENABLE_PROPERTY, false /* def */);
+        mPreference.setChecked(enableBtSnoopLog);
+    }
+
+    @Override
+    public void onDeveloperOptionsEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    public void onDeveloperOptionsDisabled() {
+        SystemProperties.set(BLUETOOTH_BTSNOOP_ENABLE_PROPERTY, Boolean.toString(false));
+        mPreference.setChecked(false);
+        mPreference.setEnabled(false);
+    }
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -143,6 +143,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
             Lifecycle lifecycle) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         controllers.add(new StayAwakePreferenceController(context, lifecycle));
+        controllers.add(new BluetoothSnoopLogPreferenceController(context));
 
         return controllers;
     }

tests/robotests/src/com/android/settings/development/BluetoothSnoopLogPreferenceControllerTest.java

@@ -0,0 +1,117 @@
+/*
+ * 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.development;
+
+import static com.android.settings.development.BluetoothSnoopLogPreferenceController
+        .BLUETOOTH_BTSNOOP_ENABLE_PROPERTY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.SettingsShadowSystemProperties;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH,
+        sdk = TestConfig.SDK_VERSION,
+        shadows = {SettingsShadowSystemProperties.class})
+public class BluetoothSnoopLogPreferenceControllerTest {
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private SwitchPreference mPreference;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+    private BluetoothSnoopLogPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mController = new BluetoothSnoopLogPreferenceController(mContext);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void onPreferenceChanged_turnOnBluetoothSnoopLog() {
+        mController.onPreferenceChange(null, true);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_BTSNOOP_ENABLE_PROPERTY, false);
+
+        assertThat(mode).isTrue();
+    }
+
+    @Test
+    public void onPreferenceChanged_turnOffBluetoothSnoopLog() {
+        mController.onPreferenceChange(null, false);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_BTSNOOP_ENABLE_PROPERTY, false);
+
+        assertThat(mode).isFalse();
+    }
+
+    @Test
+    public void updateState_preferenceShouldBeChecked() {
+        SettingsShadowSystemProperties.set(BLUETOOTH_BTSNOOP_ENABLE_PROPERTY,
+                Boolean.toString(true));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    public void updateState_preferenceShouldNotBeChecked() {
+        SettingsShadowSystemProperties.set(BLUETOOTH_BTSNOOP_ENABLE_PROPERTY,
+                Boolean.toString(false));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsDisabled();
+
+        verify(mPreference).setEnabled(false);
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsEnabled_shouldEnablePreference() {
+        mController.onDeveloperOptionsEnabled();
+
+        verify(mPreference).setEnabled(true);
+    }
+}