Adding the first set of remote test cases and associated framework.

chrome/test/remoting/remote_test_helper.h

+// 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.
+
+#ifndef CHROME_TEST_REMOTING_REMOTE_TEST_HELPER_H_
+#define CHROME_TEST_REMOTING_REMOTE_TEST_HELPER_H_
+
+#include "base/debug/stack_trace.h"
+#include "base/timer/timer.h"
+#include "content/public/test/browser_test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+// ASSERT_TRUE can only be used in void returning functions. This version
+// should be used in non-void-returning functions.
+inline void _ASSERT_TRUE(bool condition) {
+  if (!condition) {
+    // ASSERT_TRUE only prints the first call frame in the error message.
+    // In our case, this is the _ASSERT_TRUE wrapper function, which is not
+    // useful.  To help with debugging, we will dump the full callstack.
+    LOG(ERROR) << "Assertion failed.";
+    LOG(ERROR) << base::debug::StackTrace().ToString();
+  }
+  ASSERT_TRUE(condition);
+  return;
+}
+
+}  // namespace
+
+namespace remoting {
+
+// Mirrored in host.js
+enum Action {
+  ERROR = -1,
+  NONE = 0,
+  KEYDOWN = 1,
+  BUTTONPRESS = 2,
+  MOUSEMOVE = 3,
+  MOUSEWHEEL = 4,
+  DRAG = 5,
+};
+
+typedef struct {
+  Action action = Action::NONE;
+  int value = 0;
+  int modifiers = 0;
+} Event;
+
+
+class RemoteTestHelper {
+ public:
+
+  explicit RemoteTestHelper(content::WebContents* web_content)
+     :web_content_(web_content) {}
+
+  // We do this so we can be used in a Callback.

[Jamie, 2014/12/18 21:31:44]

If you're sure that the reference to this object will not outlive the object
itself, you can use base::Unretained (which is essentially an explicit,
self-documenting and standard way of achieving the same as you've done here). If
not, you should use a WeakPtr or have this class inherit from RefCounted.

+  void AddRef() {}
+  void Release() {}
+
+  // Helper to execute a JavaScript code snippet and extract the boolean result.
+  static bool ExecuteScriptAndExtractBool(content::WebContents* web_contents,
+                                          const std::string& script);
+
+  // Helper to execute a JavaScript code snippet and extract the int result.
+  static int ExecuteScriptAndExtractInt(content::WebContents* web_contents,
+                                        const std::string& script);
+
+  // Helper to execute a JavaScript code snippet and extract the string result.
+  static std::string ExecuteScriptAndExtractString(
+      content::WebContents* web_contents, const std::string& script);
+
+  // Helper method to set the clear the last event
+  void ClearLastEvent();
+
+  // Helper method to get the last event
+  void GetLastEvent(Event* event);
+
+  // Execute an RPC call
+  void ExecuteRpc(const std::string& method) {
+    ExecuteRpc(method,
+               base::TimeDelta::FromSeconds(2),
+               base::TimeDelta::FromMilliseconds(500));
+  }
+  void ExecuteRpc(const std::string& method,
+                  base::TimeDelta timeout,
+                  base::TimeDelta interval);
+
+ private:
+  content::WebContents* web_content_;
+
+  // Check for a valid last event
+  bool IsValidEvent();
+
+  DISALLOW_COPY_AND_ASSIGN(RemoteTestHelper);
+};
+
+}  // namespace remoting
+
+#endif  // CHROME_TEST_REMOTING_REMOTE_TEST_HELPER_H_