Espresso test case to control loopback call

The test case is put inside a new test target. That test target will be started from a test script to asses video quality.

BUG=webrtc:6545

Review-Url: https://codereview.webrtc.org/2585813002
Cr-Commit-Position: refs/heads/master@{#16088}

webrtc/examples/androidtests/AndroidManifest.xml

@@ -12,6 +12,7 @@
       xmlns:android="http://schemas.android.com/apk/res/android"
       package="org.appspot.apprtc.test">
 
+    <uses-permission android:name="android.permissions.RUN_INSTRUMENTATION" />
     <uses-sdk android:minSdkVersion="13" android:targetSdkVersion="21" />
 
     <uses-permission android:name="android.permission.RUN_INSTRUMENTATION" />

webrtc/examples/androidtests/src/org/appspot/apprtc/test/ConnectActivityStubbedInputOutputTest.java

@@ -0,0 +1,86 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.appspot.apprtc.test;
+
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.Espresso.onView;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Environment;
+import android.support.test.espresso.IdlingPolicies;
+import android.support.test.filters.LargeTest;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+import android.support.test.InstrumentationRegistry;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import org.appspot.apprtc.CallActivity;
+import org.appspot.apprtc.ConnectActivity;
+import org.appspot.apprtc.R;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Used to start a loopback call with video input from file and video output also to file.
+ * The test case is a building block in other testing for video quality.
+ */
+@RunWith(AndroidJUnit4.class)
+@LargeTest
+public class ConnectActivityStubbedInputOutputTest {
+  private static final String TAG = "ConnectActivityStubbedInputOutputTest";
+
+  @Rule
+  public ActivityTestRule<ConnectActivity> rule =
+      new ActivityTestRule<ConnectActivity>(ConnectActivity.class) {
+        @Override
+        protected Intent getActivityIntent() {
+          Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+          Intent intent = new Intent("android.intent.action.VIEW", Uri.parse("https://appr.tc"),
+              context, ConnectActivity.class);
+
+          intent.putExtra(CallActivity.EXTRA_USE_VALUES_FROM_INTENT, true);
+
+          intent.putExtra(CallActivity.EXTRA_LOOPBACK, true);
+          intent.putExtra(CallActivity.EXTRA_AUDIOCODEC, "OPUS");
+          intent.putExtra(CallActivity.EXTRA_VIDEOCODEC, "VP8");
+          intent.putExtra(CallActivity.EXTRA_CAPTURETOTEXTURE_ENABLED, false);
+          intent.putExtra(CallActivity.EXTRA_CAMERA2, false);
+          intent.putExtra(CallActivity.EXTRA_ROOMID, UUID.randomUUID().toString().substring(0, 8));
+
+          intent.putExtra(CallActivity.EXTRA_VIDEO_FILE_AS_CAMERA,
+              Environment.getExternalStorageDirectory().getAbsolutePath()
+                  + "/chromium_tests_root/resources/reference_video_640x360_30fps.y4m");
+
+          intent.putExtra(CallActivity.EXTRA_SAVE_REMOTE_VIDEO_TO_FILE,
+              Environment.getExternalStorageDirectory().getAbsolutePath() + "/output.y4m");
+          intent.putExtra(CallActivity.EXTRA_SAVE_REMOTE_VIDEO_TO_FILE_WIDTH, 640);
+          intent.putExtra(CallActivity.EXTRA_SAVE_REMOTE_VIDEO_TO_FILE_HEIGHT, 360);
+
+          return intent;
+        }
+      };
+
+  @Test
+  public void testLoopback() throws InterruptedException {
+    // The time to write down the data during closing of the program can take a while.
+    IdlingPolicies.setMasterPolicyTimeout(240000, TimeUnit.MILLISECONDS);
+
+    // During the time we sleep it will record video.
+    Thread.sleep(10000);
+
+    // Click on hang-up button.
+    onView(withId(R.id.button_call_disconnect)).perform(click());
+  }
+}