Refactor VideoCapturerAndroid tests in WebRTC.

webrtc/api/androidtests/src/org/webrtc/Camera1CapturerTestFixtures.java

Index: webrtc/api/androidtests/src/org/webrtc/Camera1CapturerTestFixtures.java
diff --git a/webrtc/api/androidtests/src/org/webrtc/Camera1CapturerTestFixtures.java b/webrtc/api/androidtests/src/org/webrtc/Camera1CapturerTestFixtures.java
new file mode 100644
index 0000000000000000000000000000000000000000..b298521dd2168b01694e5837f459a02baec7a3cb
--- /dev/null
+++ b/webrtc/api/androidtests/src/org/webrtc/Camera1CapturerTestFixtures.java
@@ -0,0 +1,104 @@
+/*
+ *  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.webrtc;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+
+import android.content.Context;
+
+import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
+
+import static junit.framework.Assert.*;
+
+@SuppressWarnings("deprecation")
+public class Camera1CapturerTestFixtures {
+  static public void startWhileCameraIsAlreadyOpen(
+      VideoCapturerAndroid capturer, Context appContext) throws InterruptedException {
+    final List<CaptureFormat> formats = capturer.getSupportedFormats();
+    final CameraEnumerationAndroid.CaptureFormat format = formats.get(0);
+    android.hardware.Camera camera = android.hardware.Camera.open(capturer.getCurrentCameraId());
+
+    final SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create(
+        "SurfaceTextureHelper test" /* threadName */, null /* sharedContext */);
+    final CameraVideoCapturerTestFixtures.FakeCapturerObserver observer
+        = new CameraVideoCapturerTestFixtures.FakeCapturerObserver();
+    capturer.startCapture(format.width, format.height, format.framerate.max,
+        surfaceTextureHelper, appContext, observer);
+
+    if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) {
+      // The first opened camera client will be evicted.
+      assertTrue(observer.WaitForCapturerToStart());
+      capturer.stopCapture();
+    } else {
+      assertFalse(observer.WaitForCapturerToStart());
+    }
+
+    CameraVideoCapturerTestFixtures.release(capturer);
+    camera.release();
+    surfaceTextureHelper.dispose();
+  }
+
+  static public void startWhileCameraIsAlreadyOpenAndCloseCamera(
+      VideoCapturerAndroid capturer, Context appContext) throws InterruptedException {
+    final List<CaptureFormat> formats = capturer.getSupportedFormats();
+    final CameraEnumerationAndroid.CaptureFormat format = formats.get(0);
+    android.hardware.Camera camera = android.hardware.Camera.open(capturer.getCurrentCameraId());
+
+    final SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create(
+        "SurfaceTextureHelper test" /* threadName */, null /* sharedContext */);
+    final CameraVideoCapturerTestFixtures.FakeCapturerObserver observer
+        = new CameraVideoCapturerTestFixtures.FakeCapturerObserver();
+    capturer.startCapture(format.width, format.height, format.framerate.max,
+        surfaceTextureHelper, appContext, observer);
+    waitUntilIdle(capturer);
+
+    camera.release();
+
+    // Make sure camera is started and first frame is received and then stop it.
+    assertTrue(observer.WaitForCapturerToStart());
+    observer.WaitForNextCapturedFrame();
+    capturer.stopCapture();
+    if (capturer.isCapturingToTexture()) {
+      surfaceTextureHelper.returnTextureFrame();
+    }
+    CameraVideoCapturerTestFixtures.release(capturer);
+    surfaceTextureHelper.dispose();
+  }
+
+  static public void startWhileCameraIsAlreadyOpenAndStop(
+      VideoCapturerAndroid capturer, Context appContext) throws InterruptedException {
+    final List<CaptureFormat> formats = capturer.getSupportedFormats();
+    final CameraEnumerationAndroid.CaptureFormat format = formats.get(0);
+    android.hardware.Camera camera = android.hardware.Camera.open(capturer.getCurrentCameraId());
+
+    final SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create(
+        "SurfaceTextureHelper test" /* threadName */, null /* sharedContext */);
+    final CameraVideoCapturerTestFixtures.FakeCapturerObserver observer
+        = new CameraVideoCapturerTestFixtures.FakeCapturerObserver();
+    capturer.startCapture(format.width, format.height, format.framerate.max,
+        surfaceTextureHelper, appContext, observer);
+    capturer.stopCapture();
+    CameraVideoCapturerTestFixtures.release(capturer);
+    camera.release();
+    surfaceTextureHelper.dispose();
+  }
+
+  static void waitUntilIdle(VideoCapturerAndroid capturer) throws InterruptedException {
+    final CountDownLatch barrier = new CountDownLatch(1);
+    capturer.getCameraThreadHandler().post(new Runnable() {
+        @Override public void run() {
+          barrier.countDown();
+        }
+    });
+    barrier.await();
+  }
+}