Clean up search fragment loader lifecycle.

- Programatically create SearchView to make it always expand across
  entire action bar.
- Store current query text during screen rotation
- Restart loader when query text changes

Bug: 33354491
Test: RunSettingsRoboTests
Change-Id: I63838a38514569aac60c5d67ac52ac06a7acd5a3

tests/robotests/src/com/android/settings/search2/SearchFragmentTest.java

@@ -0,0 +1,102 @@
+/*
+ * 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.search2;
+
+import android.content.Context;
+import android.os.Bundle;
+
+import com.android.settings.R;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+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.Robolectric;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ActivityController;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class SearchFragmentTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private DatabaseResultLoader mDatabaseResultLoader;
+    private FakeFeatureFactory mFeatureFactory;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        FakeFeatureFactory.setupForTest(mContext);
+        mFeatureFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
+    }
+
+    @Test
+    public void screenRotate_shouldPersistQuery() {
+        when(mFeatureFactory.searchFeatureProvider
+                .getDatabaseSearchLoader(any(Context.class), anyString()))
+                .thenReturn(mDatabaseResultLoader);
+
+        final Bundle bundle = new Bundle();
+        final String testQuery = "test";
+        ActivityController<SearchActivity> activityController =
+                Robolectric.buildActivity(SearchActivity.class);
+        activityController.setup();
+        SearchFragment fragment = (SearchFragment) activityController.get().getFragmentManager()
+                .findFragmentById(R.id.main_content);
+
+        fragment.mQuery = testQuery;
+
+        activityController.saveInstanceState(bundle).pause().stop().destroy();
+
+        activityController = Robolectric.buildActivity(SearchActivity.class);
+        activityController.setup(bundle);
+
+        verify(mFeatureFactory.searchFeatureProvider)
+                .getDatabaseSearchLoader(any(Context.class), anyString());
+    }
+
+    @Test
+    public void queryTextChange_shouldTriggerLoader() {
+        when(mFeatureFactory.searchFeatureProvider
+                .getDatabaseSearchLoader(any(Context.class), anyString()))
+                .thenReturn(mDatabaseResultLoader);
+
+        final String testQuery = "test";
+        ActivityController<SearchActivity> activityController =
+                Robolectric.buildActivity(SearchActivity.class);
+        activityController.setup();
+        SearchFragment fragment = (SearchFragment) activityController.get().getFragmentManager()
+                .findFragmentById(R.id.main_content);
+
+        fragment.onQueryTextChange(testQuery);
+
+        verify(mFeatureFactory.searchFeatureProvider)
+                .getDatabaseSearchLoader(any(Context.class), anyString());
+    }
+}