Add swipe to see notification to "Notification preferences"

Bug: 31799948
Test: RunSettingsRoboTests
Change-Id: Ib892ca4d5596c1c89e1efaf636a3eefd7cee371a

tests/robotests/src/com/android/settings/gestures/SwipeToNotificationPreferenceControllerTest.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2016 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.gestures;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.support.v7.preference.TwoStatePreference;
+
+import com.android.settings.TestConfig;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowApplication;
+
+import static android.provider.Settings.Secure.SYSTEM_NAVIGATION_KEYS_ENABLED;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class SwipeToNotificationPreferenceControllerTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private PreferenceScreen mScreen;
+
+    private SwipeToNotificationPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mController = new SwipeToNotificationPreferenceController(mContext);
+    }
+
+    @Test
+    public void display_configIsTrue_shouldDisplay() {
+        when(mContext.getResources().
+                getBoolean(com.android.internal.R.bool.config_supportSystemNavigationKeys))
+                .thenReturn(true);
+        mController.displayPreference(mScreen);
+
+        verify(mScreen, never()).removePreference(any(Preference.class));
+    }
+
+    @Test
+    public void display_configIsFalse_shouldNotDisplay() {
+        when(mContext.getResources().
+                getBoolean(com.android.internal.R.bool.config_supportSystemNavigationKeys))
+                .thenReturn(false);
+        when(mScreen.findPreference(mController.getPreferenceKey()))
+                .thenReturn(mock(Preference.class));
+
+        mController.displayPreference(mScreen);
+
+        verify(mScreen).removePreference(any(Preference.class));
+    }
+
+    @Test
+    public void updateState_preferenceSetCheckedWhenSettingIsOn() {
+        final TwoStatePreference preference = mock(TwoStatePreference.class);
+        final Context context = ShadowApplication.getInstance().getApplicationContext();
+        Settings.System.putInt(context.getContentResolver(), SYSTEM_NAVIGATION_KEYS_ENABLED, 1);
+
+        mController = new SwipeToNotificationPreferenceController(context);
+        mController.updateState(preference);
+
+        verify(preference).setChecked(true);
+    }
+
+    @Test
+    public void updateState_preferenceSetUncheckedWhenSettingIsOff() {
+        final TwoStatePreference preference = mock(TwoStatePreference.class);
+        final Context context = ShadowApplication.getInstance().getApplicationContext();
+        Settings.System.putInt(context.getContentResolver(), SYSTEM_NAVIGATION_KEYS_ENABLED, 0);
+
+        mController = new SwipeToNotificationPreferenceController(context);
+        mController.updateState(preference);
+
+        verify(preference).setChecked(false);
+    }
+
+}