Changes view manager test to connect via shell

mojo/shell/shell_test_helper.cc

Index: mojo/shell/shell_test_helper.cc
diff --git a/mojo/shell/shell_test_helper.cc b/mojo/shell/shell_test_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..75db6e4771bcb1f486115cb37a4af9fa47cdb72f
--- /dev/null
+++ b/mojo/shell/shell_test_helper.cc
@@ -0,0 +1,115 @@
+// 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/shell/shell_test_helper.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "mojo/shell/context.h"
+#include "mojo/shell/init.h"
+
+namespace mojo {
+namespace shell {
+
+// State used on the background thread. Be careful, this is created on the main
+// thread than passed to the shell thread. Destruction happens on the shell
+// thread.
+struct ShellTestHelper::State {
+  scoped_ptr<Context> context;
+  ScopedShellHandle shell_handle;
+};
+
+namespace {
+
+class TestServiceLoader : public ServiceLoader {
+ public:
+  explicit TestServiceLoader(ScopedShellHandle* handle) : handle_(handle) {}
+  virtual ~TestServiceLoader() {}
+
+  // ServiceLoader:
+  virtual void LoadService(ServiceManager* manager,
+                           const GURL& url,
+                           ScopedShellHandle service_handle) OVERRIDE {
+    // Bounce the handle back to the main thread.
+    *handle_ = service_handle.Pass();
+  }
+
+  virtual void OnServiceError(ServiceManager* manager,
+                              const GURL& url) OVERRIDE {
+    CHECK(false);
+  }
+
+ private:
+  ScopedShellHandle* handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestServiceLoader);
+};
+
+void StartShellOnShellThread(ShellTestHelper::State* state) {
+  state->context.reset(new Context);
+  MessagePipe pipe;
+  state->context->service_manager()->set_default_loader(
+      scoped_ptr<ServiceLoader>(new TestServiceLoader(&state->shell_handle)));
+  state->context->service_manager()->Connect(GURL("test:test"),
+                                              pipe.handle0.Pass());
+  // Destroy TestServiceLoader as it's no longer needed.
+  state->context->service_manager()->set_default_loader(
+      scoped_ptr<ServiceLoader>());
+}
+
+}  // namespace
+
+class ShellTestHelper::TestShellClient : public ShellClient {
+ public:
+  TestShellClient() {}
+  virtual ~TestShellClient() {}
+
+  // ShellClient:
+  virtual void AcceptConnection(
+      const mojo::String& url,
+      ScopedMessagePipeHandle client_handle) OVERRIDE {
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestShellClient);
+};
+
+ShellTestHelper::ShellTestHelper()
+    : shell_thread_("Test Shell Thread"),
+      state_(NULL) {
+  CommandLine::Init(0, NULL);
+  mojo::shell::InitializeLogging();
+}
+
+ShellTestHelper::~ShellTestHelper() {
+  if (state_) {
+    // |state_| contains data created on the background thread. Destroy it
+    // there so that there aren't any race conditions.
+    shell_thread_.message_loop()->DeleteSoon(FROM_HERE, state_);
+    state_ = NULL;
+  }
+}
+
+void ShellTestHelper::Init() {
+  DCHECK(!state_);
+  state_ = new State;
+  shell_thread_.Start();
+  shell_thread_.message_loop()->message_loop_proxy()->PostTaskAndReply(
+      FROM_HERE,
+      base::Bind(&StartShellOnShellThread, state_),
+      base::Bind(&ShellTestHelper::OnShellStarted, base::Unretained(this)));
+  run_loop_.reset(new base::RunLoop);
+  run_loop_->Run();
+}
+
+void ShellTestHelper::OnShellStarted() {
+  DCHECK(state_);
+  shell_client_.reset(new TestShellClient);
+  shell_.reset(state_->shell_handle.Pass(), shell_client_.get());
+  run_loop_->Quit();
+}
+
+}  // namespace shell
+}  // namespace mojo