1 files changed, 86 insertions, 0 deletions
diff --git a/tests/jank/src/com/android/tv/tests/jank/ChannelZappingJankTest.java b/tests/jank/src/com/android/tv/tests/jank/ChannelZappingJankTest.java
new file mode 100644
index 00000000..b0463e71
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+++ b/tests/jank/src/com/android/tv/tests/jank/ChannelZappingJankTest.java
@@ -0,0 +1,86 @@
+/*
+ * 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.tv.tests.jank;
+
+import android.content.res.Resources;
+import android.support.test.filters.MediumTest;
+import android.support.test.jank.GfxMonitor;
+import android.support.test.jank.JankTest;
+import android.support.test.jank.JankTestBase;
+import android.support.test.uiautomator.UiDevice;
+
+import com.android.tv.testing.uihelper.LiveChannelsUiDeviceHelper;
+
+/**
+ * Jank tests for channel zapping.
+ */
+@MediumTest
+public class ChannelZappingJankTest extends JankTestBase {
+    private static final String TAG = "ChannelZappingJankTest";
+
+    private static final String STARTING_CHANNEL = "13";
+
+    /**
+     * The minimum number of frames expected during each jank test.
+     * If there is less the test will fail. To be safe we loop the action in each test to create
+     * twice this many frames under normal conditions.
+     * <p>At least 100 frams should be chosen so there will be enough frame
+     * for the 90th, 95th, and 98th percentile measurements are significant.
+     *
+     * @see <a href="http://go/janktesthelper-best-practices">Jank Test Helper Best Practices</a>
+     */
+    private static final int EXPECTED_FRAMES = 100;
+    private static final int WARM_UP_CHANNEL_ZAPPING_COUNT = 2;
+
+    private UiDevice mDevice;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mDevice = UiDevice.getInstance(getInstrumentation());
+        Resources targetResources = getInstrumentation().getTargetContext().getResources();
+        LiveChannelsUiDeviceHelper liveChannelsHelper = new LiveChannelsUiDeviceHelper(mDevice,
+                targetResources, getInstrumentation().getContext());
+        liveChannelsHelper.assertAppStarted();
+        Utils.pressKeysForChannelNumber(STARTING_CHANNEL, mDevice);
+    }
+
+    @JankTest(expectedFrames = EXPECTED_FRAMES,
+            beforeTest = "warmChannelZapping")
+    @GfxMonitor(processName = Utils.LIVE_CHANNELS_PROCESS_NAME)
+    public void testChannelZapping() {
+        int frameCountForOneChannelZapping = 40;  // measured by hand
+        int repeat = EXPECTED_FRAMES * 2 / frameCountForOneChannelZapping;
+        for (int i = 0; i < repeat; i++) {
+            mDevice.pressDPadUp();
+            mDevice.waitForIdle();
+            // Press BACK to close banner.
+            mDevice.pressBack();
+            mDevice.waitForIdle();
+        }
+    }
+
+    // It's public to be used with @JankTest annotation.
+    public void warmChannelZapping() {
+        for (int i = 0; i < WARM_UP_CHANNEL_ZAPPING_COUNT; ++i) {
+            mDevice.pressDPadUp();
+            mDevice.waitForIdle();
+        }
+        // Press BACK to close banner.
+        mDevice.pressBack();
+        mDevice.waitForIdle();
+    }
+}