Android Instrumentations tests are ready to be run in github/CI open source environment

Reviewed By: mkonicek

Differential Revision: D2769217

fb-gh-sync-id: 7469af816241d8b642753cca21f6542b971e9572

ReactAndroid/src/androidTest/java/com/facebook/react/testing/JSIntegrationTestChecker.java

@@ -0,0 +1,59 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.react.testing;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import com.facebook.react.bridge.BaseJavaModule;
+import com.facebook.react.bridge.Callback;
+import com.facebook.react.bridge.ReactMethod;
+
+/**
+ * This class is used to verify that some JS integration tests have completed successfully.
+ * The JS integration tests can be started from a ReactIntegrationTestCase and upon
+ * finishing successfully the {@link JSIntegrationTestChecker#testDone()} method will be called.
+ * To verify if the test has completed successfully, call {#link JSIntegrationTestChecker#await()}
+ * to wait for the test to run, and {#link JSIntegrationTestChecker#isTestDone()} to check if it
+ * completed successfully.
+ */
+public class JSIntegrationTestChecker extends BaseJavaModule {
+
+  private final CountDownLatch mLatch;
+
+  public JSIntegrationTestChecker() {
+    mLatch = new CountDownLatch(1);
+  }
+
+  @Override
+  public String getName() {
+    return "TestModule";
+  }
+
+  @ReactMethod
+  public void markTestCompleted() {
+    mLatch.countDown();
+  }
+
+  @ReactMethod
+  public void verifySnapshot(Callback callback) {
+  }
+
+  public boolean await(long ms) {
+    try {
+      return mLatch.await(ms, TimeUnit.MILLISECONDS);
+    } catch (InterruptedException ignore) {
+      return false;
+    }
+  }
+
+  public boolean isTestDone() {
+    return mLatch.getCount() == 0;
+  }
+}