DevTools socket tunnel.

components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/TestUtils.java

Index: components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/TestUtils.java
diff --git a/components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/TestUtils.java b/components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/TestUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..71b59ba66939ea64eb94a9bfa8abd864a7436cca
--- /dev/null
+++ b/components/devtools_bridge/test/android/javatests/src/org/chromium/components/devtools_bridge/TestUtils.java
@@ -0,0 +1,131 @@
+// 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.components.devtools_bridge;
+
+import android.net.LocalSocket;
+import android.net.LocalSocketAddress;
+
+import java.io.IOException;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+/**
+ * Utilities to testing a socket tunnel.
+ */
+public class TestUtils {
+    private static final String CHARSET = "UTF-8";
+
+    // Sends |request| string to UNIX socket socketName on another thread and returns
+    // Future<String> for obtainings response.
+    public static Future<String> asyncRequest(final String socketName, final String request) {
+
+        final ExecutorService executor = Executors.newSingleThreadExecutor();
+
+        return executor.submit(new Callable<String>() {
+            @Override
+            public String call() throws Exception {
+                LocalSocket socket = new LocalSocket();
+                socket.connect(new LocalSocketAddress(socketName));
+                writeAndShutdown(socket, request);
+
+                String response = readAll(socket);
+                socket.close();
+
+                executor.shutdown();
+                return response;
+            }
+       });
+    }
+
+    public static void writeAndShutdown(LocalSocket socket, String data) throws IOException {
+        socket.getOutputStream().write(data.getBytes(CHARSET));
+        socket.getOutputStream().flush();
+        socket.shutdownOutput();
+    }
+
+    // Reads all bytes from socket input stream until EOF and converts it to UTF-8 string.
+    public static String readAll(LocalSocket socket) throws IOException {
+        byte[] buffer = new byte[1000];
+        int position = 0;
+        while (true) {
+            int count = socket.getInputStream().read(buffer, position, buffer.length - position);
+            if (count == -1)
+                break;
+            position += count;
+        }
+        return new String(buffer, 0, position, CHARSET);
+    }
+
+    /**
+     * Utility class for thread synchronization. Allow to track moving through series of steps.
+     */
+    public static class StateBarrier<T> {
+        private T mState;
+
+        public StateBarrier(T initialState) {
+            mState = initialState;
+        }
+
+        // Waits until state |from| reached and change state to |to|.
+        public synchronized void advance(T from, T to) {
+            while (mState.equals(from)) {
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            mState = to;
+            notifyAll();
+        }
+    }
+
+    /**
+     * Helper with runs code on another thread and synchronously take the result.
+     */
+    public static class InvokeHelper<T> {
+        private final CountDownLatch mDone = new CountDownLatch(1);
+
+        private T mResult = null;
+        private Exception mException = null;
+
+        public void runOnTargetThread(Callable<T> callable) {
+            try {
+                mResult = callable.call();
+            } catch (Exception e) {
+                mException = e;
+            }
+            mDone.countDown();
+        }
+
+        public T takeResult() throws Exception {
+            mDone.await();
+            if (mException != null)
+                throw mException;
+            else
+                return mResult;
+        }
+    }
+
+    /**
+     * Adapts Runnable to Callable<Void>.
+     */
+    public static class RunnableAdapter implements Callable<Void> {
+        private final Runnable mAdaptee;
+
+        public RunnableAdapter(Runnable adaptee) {
+            mAdaptee = adaptee;
+        }
+
+        @Override
+        public Void call() {
+            mAdaptee.run();
+            return null;
+        }
+    }
+}