Add a Mojo example apptest that runs in mojo_shell.

mojo/examples/apptest/example_apptest.cc

Index: mojo/examples/apptest/example_apptest.cc
diff --git a/mojo/examples/apptest/example_apptest.cc b/mojo/examples/apptest/example_apptest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9f0397a005f43ce777158cf0505be2e3c9099850
--- /dev/null
+++ b/mojo/examples/apptest/example_apptest.cc
@@ -0,0 +1,92 @@
+// 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.
+
+#include "mojo/examples/apptest/example_client_impl.h"
+#include "mojo/examples/apptest/example_service.mojom.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/bindings/callback.h"
+#include "mojo/public/cpp/environment/environment.h"
+#include "mojo/public/cpp/system/macros.h"
+#include "mojo/public/cpp/utility/run_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+// TODO(msw): Remove this once we can get ApplicationImpl from TLS.
+mojo::ApplicationImpl* g_application_impl_hack = NULL;
+
+}  // namespace
+
+namespace mojo {
+
+namespace {
+
+class ExampleServiceTest : public testing::Test {
+ public:
+  ExampleServiceTest() {
+    g_application_impl_hack->ConnectToService("mojo:mojo_example_service",
+                                              &example_service_);
+    example_service_.set_client(&example_client_);
+  }
+
+  virtual ~ExampleServiceTest() MOJO_OVERRIDE {}
+
+ protected:
+  ExampleServicePtr example_service_;
+  ExampleClientImpl example_client_;
+
+ private:
+  MOJO_DISALLOW_COPY_AND_ASSIGN(ExampleServiceTest);
+};
+
+TEST_F(ExampleServiceTest, Ping) {
+  EXPECT_EQ(0, example_client_.last_pong_value());
+  example_service_->Ping(1);
+  mojo::RunLoop::current()->Run();
+  EXPECT_EQ(1, example_client_.last_pong_value());
+}
+
+template <typename T>
+struct SetAndQuit : public Callback<void()>::Runnable {
+  SetAndQuit(T* val, T result) : val_(val), result_(result) {}
+  virtual ~SetAndQuit() {}
+  virtual void Run() const MOJO_OVERRIDE{
+    *val_ = result_;
+    mojo::RunLoop::current()->Quit();
+  }
+  T* val_;
+  T result_;
+};
+
+TEST_F(ExampleServiceTest, RunCallback) {
+  bool was_run = false;
+  example_service_->RunCallback(SetAndQuit<bool>(&was_run, true));
+  mojo::RunLoop::current()->Run();
+  EXPECT_TRUE(was_run);
+}
+
+}  // namespace
+
+}  // namespace mojo
+
+extern "C" APPLICATION_EXPORT MojoResult CDECL MojoMain(
+    MojoHandle shell_handle) {
+  mojo::Environment env;
+  mojo::RunLoop loop;
+
+  mojo::ApplicationDelegate* delegate = mojo::ApplicationDelegate::Create();
+  mojo::ApplicationImpl app(delegate);
+  app.BindShell(shell_handle);
+  g_application_impl_hack = &app;
+
+  // TODO(msw): Get actual commandline arguments.
+  int argc = 0;
+  char** argv = NULL;
+  testing::InitGoogleTest(&argc, argv);
+  mojo_ignore_result(RUN_ALL_TESTS());
+
+  delete delegate;
+  return MOJO_RESULT_OK;
+}