Merge "Log visibility change for all fragments."

tests/unit/src/com/android/settings/core/instrumentation/MetricsFactoryTest.java

@@ -0,0 +1,44 @@
+/*
+ * 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.core.instrumentation;
+
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.assertTrue;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class MetricsFactoryTest {
+
+    @Test
+    public void factoryShouldReuseCachedInstance() {
+        MetricsFactory factory1 = MetricsFactory.get();
+        MetricsFactory factory2 = MetricsFactory.get();
+        assertTrue(factory1 == factory2);
+    }
+
+    @Test
+    public void factoryShouldCacheLogger() {
+        MetricsFactory factory = MetricsFactory.get();
+        EventLogWriter logger1 = factory.getLogger();
+        EventLogWriter logger2 = factory.getLogger();
+        assertTrue(logger1 == logger2);
+    }
+}

tests/unit/src/com/android/settings/core/instrumentation/VisibilityLoggerMixinTest.java

@@ -0,0 +1,70 @@
+/*
+ * 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.core.instrumentation;
+
+import android.content.Context;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class VisibilityLoggerMixinTest {
+
+    @Mock
+    private EventLogWriter mLogger;
+    private VisibilityLoggerMixin mMixin;
+
+    @Before
+    public void init() {
+        MockitoAnnotations.initMocks(this);
+        mMixin = new VisibilityLoggerMixin(new TestInstrumentable(), mLogger);
+    }
+
+    @Test
+    public void shouldLogVisibleOnResume() {
+        mMixin.onResume(null);
+        verify(mLogger, times(1))
+                .visible(any(Context.class), eq(TestInstrumentable.TEST_METRIC));
+    }
+
+    @Test
+    public void shouldLogHideOnPause() {
+        mMixin.onPause(null);
+        verify(mLogger, times(1))
+                .hidden(any(Context.class), eq(TestInstrumentable.TEST_METRIC));
+    }
+
+    private final class TestInstrumentable implements Instrumentable {
+
+        public static final int TEST_METRIC = 12345;
+
+        @Override
+        public int getMetricsCategory() {
+            return TEST_METRIC;
+        }
+    }
+}