Move theme setting out of tuner to display

Test: runtest --path
packages/apps/Settings/tests/unit/src/com/android/settings/display/
Fixes: 34682466

Change-Id: Ifc21e390bf8441308871d487bd60d59826603ec2

tests/unit/src/com/android/settings/display/ThemePreferenceControllerTest.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.core;
+
+import static junit.framework.TestCase.assertNotNull;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.UiModeManager;
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+import android.support.v7.preference.ListPreference;
+
+import com.android.settings.R;
+import com.android.settings.display.ThemePreferenceController;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class ThemePreferenceControllerTest {
+
+    private UiModeManager mMockUiModeManager;
+    private ContextWrapper mContext;
+    private ThemePreferenceController mPreferenceController;
+
+    @Before
+    public void setup() {
+        mMockUiModeManager = mock(UiModeManager.class);
+        mContext = new ContextWrapper(InstrumentationRegistry.getTargetContext()) {
+            @Override
+            public Object getSystemService(String name) {
+                if (Context.UI_MODE_SERVICE.equals(name)) {
+                    return mMockUiModeManager;
+                }
+                return super.getSystemService(name);
+            }
+        };
+        mPreferenceController = new ThemePreferenceController(mContext);
+    }
+
+    @Test
+    public void testUpdateState() {
+        when(mMockUiModeManager.getAvailableThemes()).thenReturn(new String[] {
+                null,
+                "Theme1",
+                "Theme2",
+        });
+        when(mMockUiModeManager.getTheme()).thenReturn("Theme1");
+        ListPreference pref = mock(ListPreference.class);
+        mPreferenceController.updateState(pref);
+        ArgumentCaptor<String[]> arg = ArgumentCaptor.forClass(String[].class);
+        verify(pref).setEntries(arg.capture());
+
+        String[] entries = arg.getValue();
+        assertEquals(3, entries.length);
+        assertNotNull(entries[0]);
+        assertEquals("Theme1", entries[1]);
+        assertEquals("Theme2", entries[2]);
+
+        verify(pref).setEntryValues(arg.capture());
+        String[] entryValues = arg.getValue();
+        assertEquals(3, entryValues.length);
+        assertNotNull(entryValues[0]);
+        assertEquals("Theme1", entryValues[1]);
+        assertEquals("Theme2", entryValues[2]);
+
+        verify(pref).setValue(eq("Theme1"));
+    }
+
+    @Test
+    public void testAvailable_false() {
+        when(mMockUiModeManager.getAvailableThemes()).thenReturn(new String[1]);
+        assertFalse(mPreferenceController.isAvailable());
+    }
+
+    @Test
+    public void testAvailable_true() {
+        when(mMockUiModeManager.getAvailableThemes()).thenReturn(new String[2]);
+        assertTrue(mPreferenceController.isAvailable());
+    }
+}