Add preference group for saved devcies.

Currently it only contains bluetooth devices.

Bug: 3240835
Test: RunSettingsRoboTests
Change-Id: Ief102e7174a4c4610dbda6b728419b303ff928f9

tests/robotests/src/com/android/settings/bluetooth/SavedBluetoothDeviceUpdaterTest.java

@@ -0,0 +1,108 @@
+/*
+ * 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.bluetooth;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+
+import com.android.settings.TestConfig;
+import com.android.settings.connecteddevice.DevicePreferenceCallback;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settingslib.bluetooth.CachedBluetoothDevice;
+
+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;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION_O)
+public class SavedBluetoothDeviceUpdaterTest {
+    @Mock
+    private DashboardFragment mDashboardFragment;
+    @Mock
+    private DevicePreferenceCallback mDevicePreferenceCallback;
+    @Mock
+    private CachedBluetoothDevice mCachedBluetoothDevice;
+    @Mock
+    private BluetoothDevice mBluetoothDevice;
+
+    private Context mContext;
+    private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = RuntimeEnvironment.application;
+        doReturn(mContext).when(mDashboardFragment).getContext();
+        doReturn(mBluetoothDevice).when(mCachedBluetoothDevice).getDevice();
+
+        mBluetoothDeviceUpdater = spy(new SavedBluetoothDeviceUpdater(mDashboardFragment,
+                mDevicePreferenceCallback, null));
+        mBluetoothDeviceUpdater.setPrefContext(mContext);
+        doNothing().when(mBluetoothDeviceUpdater).addPreference(any());
+        doNothing().when(mBluetoothDeviceUpdater).removePreference(any());
+    }
+
+    @Test
+    public void testUpdate_filterMatch_addPreference() {
+        doReturn(BluetoothDevice.BOND_BONDED).when(mBluetoothDevice).getBondState();
+        doReturn(false).when(mBluetoothDevice).isConnected();
+
+        mBluetoothDeviceUpdater.update(mCachedBluetoothDevice);
+
+        verify(mBluetoothDeviceUpdater).addPreference(mCachedBluetoothDevice);
+    }
+
+    @Test
+    public void testUpdate_filterNotMatch_removePreference() {
+        doReturn(BluetoothDevice.BOND_NONE).when(mBluetoothDevice).getBondState();
+        doReturn(true).when(mBluetoothDevice).isConnected();
+
+        mBluetoothDeviceUpdater.update(mCachedBluetoothDevice);
+
+        verify(mBluetoothDeviceUpdater).removePreference(mCachedBluetoothDevice);
+    }
+
+    @Test
+    public void testOnConnectionStateChanged_deviceConnected_removePreference() {
+        mBluetoothDeviceUpdater.onConnectionStateChanged(mCachedBluetoothDevice,
+                BluetoothAdapter.STATE_CONNECTED);
+
+        verify(mBluetoothDeviceUpdater).removePreference(mCachedBluetoothDevice);
+    }
+
+    @Test
+    public void testOnConnectionStateChanged_deviceDisconnected_addPreference() {
+        mBluetoothDeviceUpdater.onConnectionStateChanged(mCachedBluetoothDevice,
+                BluetoothAdapter.STATE_DISCONNECTED);
+
+        verify(mBluetoothDeviceUpdater).addPreference(mCachedBluetoothDevice);
+    }
+
+}