Mojo: Add a trivial end-to-end (in-process) test of Mojo shell.

mojo/shell/shell_test_base.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 MOJO_SHELL_SHELL_TEST_BASE_H_
 #define MOJO_SHELL_SHELL_TEST_BASE_H_
 
-#include "base/at_exit.h"
+#include <string>
+
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "mojo/public/cpp/environment/environment.h"
+#include "mojo/public/cpp/system/core.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+class GURL;
+
+namespace base {
+class MessageLoop;
+}
+
 namespace mojo {
 namespace shell {
+
+class Context;
+
 namespace test {
 
 class ShellTestBase : public testing::Test {
  public:
   ShellTestBase();
   virtual ~ShellTestBase();
 
+  // Should be called before any of the methods below are called.
+  void InitMojo();
+
+  // Launches the given service in-process; |service_url| should typically be a
+  // mojo: URL (the origin will be set to an "appropriate" file: URL).
+  void LaunchServiceInProcess(const GURL& service_url,
+                              const std::string& service_name,
+                              ScopedMessagePipeHandle client_handle);
+
+  base::MessageLoop* message_loop() { return message_loop_.get(); }
+  Context* shell_context() { return shell_context_.get(); }
+
  private:
-  base::ShadowingAtExitManager at_exit_manager_;
   Environment environment_;
 
+  // Only set if/when |InitMojo()| is called.
+  scoped_ptr<base::MessageLoop> message_loop_;
+  scoped_ptr<Context> shell_context_;
+
   DISALLOW_COPY_AND_ASSIGN(ShellTestBase);
 };
 
 }  // namespace test
+
 }  // namespace shell
 }  // namespace mojo
 
-#endif  // MOJO_SYSTEM_SHELL_SHELLASE_H_
+#endif  // MOJO_SHELL_SHELL_TEST_BASE_H_