Merge "Support category changed mechanism in homepage" into sc-dev

tests/robotests/src/com/android/settings/core/CategoryMixinTest.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2021 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 com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.anySet;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import android.content.BroadcastReceiver;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Bundle;
+import android.util.ArraySet;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.android.settings.core.CategoryMixin.CategoryListener;
+import com.android.settingslib.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.android.controller.ActivityController;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+public class CategoryMixinTest {
+    private ActivityController<TestActivity> mActivityController;
+
+    @Before
+    public void setUp() {
+        mActivityController = Robolectric.buildActivity(TestActivity.class);
+    }
+
+    @Test
+    public void resumeActivity_shouldRegisterReceiver() {
+        mActivityController.setup();
+
+        final TestActivity activity = mActivityController.get();
+        assertThat(activity.getRegisteredReceivers()).isNotEmpty();
+    }
+
+    @Test
+    public void pauseActivity_shouldUnregisterReceiver() {
+        mActivityController.setup().pause();
+
+        final TestActivity activity = mActivityController.get();
+        assertThat(activity.getRegisteredReceivers()).isEmpty();
+    }
+
+    @Test
+    public void onCategoriesChanged_listenerAdded_shouldNotifyChanged() {
+        mActivityController.setup().pause();
+        final CategoryMixin categoryMixin = mActivityController.get().getCategoryMixin();
+        final CategoryListener listener = mock(CategoryListener.class);
+        categoryMixin.addCategoryListener(listener);
+
+        categoryMixin.onCategoriesChanged(new ArraySet<>());
+
+        verify(listener).onCategoriesChanged(anySet());
+    }
+
+    static class TestActivity extends AppCompatActivity implements CategoryMixin.CategoryHandler {
+
+        private CategoryMixin mCategoryMixin;
+        private List<BroadcastReceiver> mRegisteredReceivers = new ArrayList<>();
+
+        @Override
+        protected void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+            setTheme(R.style.Theme_AppCompat);
+            mCategoryMixin = new CategoryMixin(this);
+            getLifecycle().addObserver(mCategoryMixin);
+        }
+
+        @Override
+        public CategoryMixin getCategoryMixin() {
+            return mCategoryMixin;
+        }
+
+        @Override
+        public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
+            mRegisteredReceivers.add(receiver);
+            return super.registerReceiver(receiver, filter);
+        }
+
+        @Override
+        public void unregisterReceiver(BroadcastReceiver receiver) {
+            mRegisteredReceivers.remove(receiver);
+            super.unregisterReceiver(receiver);
+        }
+
+        List<BroadcastReceiver> getRegisteredReceivers() {
+            return mRegisteredReceivers;
+        }
+    }
+}