Introduce LocalBackupPasswordPreferenceController

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

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I86d0d2402e8092e9f03498254ae4e3bf7bb9bf3d

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

@@ -238,7 +238,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
             Activity activity, Lifecycle lifecycle, DevelopmentSettingsDashboardFragment fragment) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         // take bug report
-        // desktop backup password
+        controllers.add(new LocalBackupPasswordPreferenceController(context));
         controllers.add(new StayAwakePreferenceController(context, lifecycle));
         // hdcp checking
         controllers.add(new BluetoothSnoopLogPreferenceController(context));

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

@@ -0,0 +1,85 @@
+/*
+ * 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.app.backup.IBackupManager;
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.UserManager;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+
+public class LocalBackupPasswordPreferenceController extends DeveloperOptionsPreferenceController {
+
+    private static final String LOCAL_BACKUP_PASSWORD = "local_backup_password";
+
+    private final UserManager mUserManager;
+    private final IBackupManager mBackupManager;
+
+    public LocalBackupPasswordPreferenceController(Context context) {
+        super(context);
+
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mBackupManager = IBackupManager.Stub.asInterface(
+                ServiceManager.getService(Context.BACKUP_SERVICE));
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return LOCAL_BACKUP_PASSWORD;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        updatePasswordSummary(preference);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        // intentional no-op
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        // intentional no-op
+    }
+
+    private void updatePasswordSummary(Preference preference) {
+        preference.setEnabled(isAdminUser() && mBackupManager != null);
+        if (mBackupManager == null) {
+            return;
+        }
+        try {
+            if (mBackupManager.hasBackupPassword()) {
+                preference.setSummary(R.string.local_backup_password_summary_change);
+            } else {
+                preference.setSummary(R.string.local_backup_password_summary_none);
+            }
+        } catch (RemoteException e) {
+            // Not much we can do here
+        }
+    }
+
+    @VisibleForTesting
+    boolean isAdminUser() {
+        return mUserManager.isAdminUser();
+    }
+}

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

@@ -0,0 +1,120 @@
+package com.android.settings.development;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.backup.IBackupManager;
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.UserManager;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class LocalBackupPasswordPreferenceControllerTest {
+
+    @Mock
+    private Preference mPreference;
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private UserManager mUserManager;
+    @Mock
+    private IBackupManager mBackupManager;
+
+    private Context mContext;
+    private LocalBackupPasswordPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = spy(new LocalBackupPasswordPreferenceController(mContext));
+        ReflectionHelpers.setField(mController, "mUserManager", mUserManager);
+        when(mScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+    }
+
+    @Test
+    public void updateState_hasBackupPassword_preferenceShouldHavePasswordSetSummary()
+            throws RemoteException {
+        ReflectionHelpers.setField(mController, "mBackupManager", mBackupManager);
+        doReturn(true).when(mController).isAdminUser();
+        when(mBackupManager.hasBackupPassword()).thenReturn(true);
+        mController.displayPreference(mScreen);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(R.string.local_backup_password_summary_change);
+    }
+
+    @Test
+    public void updateState_noBackupPassword_preferenceShouldHaveNoPasswordSetSummary()
+            throws RemoteException {
+        ReflectionHelpers.setField(mController, "mBackupManager", mBackupManager);
+        doReturn(true).when(mController).isAdminUser();
+        when(mBackupManager.hasBackupPassword()).thenReturn(false);
+        mController.displayPreference(mScreen);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(R.string.local_backup_password_summary_none);
+    }
+
+    @Test
+    public void updateState_backupManagerIsNull_shouldDisablePreference() throws RemoteException {
+        ReflectionHelpers.setField(mController, "mBackupManager", null);
+        doReturn(true).when(mController).isAdminUser();
+        when(mBackupManager.hasBackupPassword()).thenReturn(true);
+        mController.displayPreference(mScreen);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setEnabled(false);
+        verify(mPreference, never()).setSummary(any());
+    }
+
+    @Test
+    public void updateState_backupManagerIsNotNullAndNotAdminUser_shouldDisablePreference()
+            throws RemoteException {
+        ReflectionHelpers.setField(mController, "mBackupManager", mBackupManager);
+        doReturn(false).when(mController).isAdminUser();
+        when(mBackupManager.hasBackupPassword()).thenReturn(true);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setEnabled(false);
+        verify(mPreference, never()).setSummary(any());
+    }
+
+    @Test
+    public void updateState_backupManagerIsNotNullAndAdminUser_shouldEnablePreference()
+            throws RemoteException {
+        ReflectionHelpers.setField(mController, "mBackupManager", mBackupManager);
+        doReturn(true).when(mController).isAdminUser();
+        when(mBackupManager.hasBackupPassword()).thenReturn(true);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setEnabled(true);
+        verify(mPreference, never()).setSummary(any());
+    }
+}