Adding an ExecutorFactory for the bindings.

mojo/android/javatests/src/org/chromium/mojo/bindings/ExecutorFactoryTest.java

Index: mojo/android/javatests/src/org/chromium/mojo/bindings/ExecutorFactoryTest.java
diff --git a/mojo/android/javatests/src/org/chromium/mojo/bindings/ExecutorFactoryTest.java b/mojo/android/javatests/src/org/chromium/mojo/bindings/ExecutorFactoryTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..40fa43b5f7dcbc18020a4aa2b9eb3e0d1dc1ef3a
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+++ b/mojo/android/javatests/src/org/chromium/mojo/bindings/ExecutorFactoryTest.java
@@ -0,0 +1,104 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.mojo.bindings;
+
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.mojo.MojoTestCase;
+import org.chromium.mojo.system.impl.CoreImpl;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.BrokenBarrierException;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Testing the executor factory.
+ */
+public class ExecutorFactoryTest extends MojoTestCase {
+
+    private static final long RUN_LOOP_TIMEOUT_MS = 50;
+    private static final int CONCURRENCY_LEVEL = 5;
+    private static final ExecutorService WORKERS = Executors.newFixedThreadPool(CONCURRENCY_LEVEL);
+
+    private Executor mExecutor;
+    private List<Thread> mThreadContainer;
+
+    /**
+     * @see MojoTestCase#setUp()
+     */
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mExecutor = ExecutorFactory.getExecutorForCurrentThread(CoreImpl.getInstance());
+        mThreadContainer = new ArrayList<Thread>();
+    }
+
+    /**
+     * Testing the {@link Executor} when called from the executor thread.
+     */
+    @SmallTest
+    public void testExecutorOnCurrentThread() {
+        Runnable action = new Runnable() {
+            @Override
+            public void run() {
+                mThreadContainer.add(Thread.currentThread());
+            }
+        };
+        mExecutor.execute(action);
+        mExecutor.execute(action);
+        assertEquals(0, mThreadContainer.size());
+        nativeRunLoop(RUN_LOOP_TIMEOUT_MS);
+        assertEquals(2, mThreadContainer.size());
+        for (Thread thread : mThreadContainer) {
+            assertEquals(Thread.currentThread(), thread);
+        }
+    }
+
+    /**
+     * Testing the {@link Executor} when called from another thread.
+     */
+    @SmallTest
+    public void testExecutorOnOtherThread() {
+        final CyclicBarrier barrier = new CyclicBarrier(CONCURRENCY_LEVEL + 1);
+        for (int i = 0; i < CONCURRENCY_LEVEL; ++i) {
+            WORKERS.execute(new Runnable() {
+                @Override
+                public void run() {
+                    mExecutor.execute(new Runnable() {
+
+                        @Override
+                        public void run() {
+                            mThreadContainer.add(Thread.currentThread());
+                        }
+                    });
+                    try {
+                        barrier.await();
+                    } catch (InterruptedException e) {
+                        fail("Unexpected exception: " + e.getMessage());
+                    } catch (BrokenBarrierException e) {
+                        fail("Unexpected exception: " + e.getMessage());
+                    }
+                }
+            });
+        }
+        try {
+            barrier.await();
+        } catch (InterruptedException e) {
+            fail("Unexpected exception: " + e.getMessage());
+        } catch (BrokenBarrierException e) {
+            fail("Unexpected exception: " + e.getMessage());
+        }
+        assertEquals(0, mThreadContainer.size());
+        nativeRunLoop(RUN_LOOP_TIMEOUT_MS);
+        assertEquals(CONCURRENCY_LEVEL, mThreadContainer.size());
+        for (Thread thread : mThreadContainer) {
+            assertEquals(Thread.currentThread(), thread);
+        }
+    }
+}