Added unit tests for getCredentialsFromAuthCode.

remoting/host/setup/oauth_client.h

 // Copyright 2013 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 REMOTING_HOST_SETUP_OAUTH_CLIENT
-#define REMOTING_HOST_SETUP_OAUTH_CLIENT
+#ifndef REMOTING_HOST_SETUP_OAUTH_CLIENT_H_
+#define REMOTING_HOST_SETUP_OAUTH_CLIENT_H_
 
-#include <queue>
 #include <string>
 
 #include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "google_apis/gaia/gaia_oauth_client.h"
-#include "net/url_request/url_request_context_getter.h"
 
-namespace net {
-class URLRequestContext;
+namespace gaia {
+struct OAuthClientInfo;
 }
 
 namespace remoting {
 
-// A wrapper around GaiaOAuthClient that provides a more convenient interface,
-// with queueing of requests and a callback rather than a delegate.
-class OAuthClient : public gaia::GaiaOAuthClient::Delegate {
+class OAuthClient {
  public:
   // Called when GetCredentialsFromAuthCode is completed, with the |user_email|
   // and |refresh_token| that correspond to the given |auth_code|, or with empty
   // strings on error.
   typedef base::Callback<void(
       const std::string& user_email,
       const std::string& refresh_token)> CompletionCallback;
 
-  OAuthClient(
-      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
-
-  ~OAuthClient() override;
+  virtual ~OAuthClient() {}
 
   // Redeems |auth_code| using |oauth_client_info| to obtain |refresh_token| and
   // |access_token|, then uses the userinfo endpoint to obtain |user_email|.
   // Calls CompletionCallback with |user_email| and |refresh_token| when done,
   // or with empty strings on error.
   // If a request is received while another one is  being processed, it is
   // enqueued and processed after the first one is finished.
-  void GetCredentialsFromAuthCode(
+  virtual void GetCredentialsFromAuthCode(
       const gaia::OAuthClientInfo& oauth_client_info,
       const std::string& auth_code,
-      CompletionCallback on_done);
-
-  // gaia::GaiaOAuthClient::Delegate
-  void OnGetTokensResponse(const std::string& refresh_token,
-                           const std::string& access_token,
-                           int expires_in_seconds) override;
-  void OnRefreshTokenResponse(const std::string& access_token,
-                              int expires_in_seconds) override;
-  void OnGetUserEmailResponse(const std::string& user_email) override;
-
-  void OnOAuthError() override;
-  void OnNetworkError(int response_code) override;
-
- private:
-  struct Request {
-    Request(const gaia::OAuthClientInfo& oauth_client_info,
-            const std::string& auth_code,
-            CompletionCallback on_done);
-    virtual ~Request();
-    gaia::OAuthClientInfo oauth_client_info;
-    std::string auth_code;
-    CompletionCallback on_done;
-  };
-
-  void SendResponse(const std::string& user_email,
-                    const std::string& refresh_token);
-
-  std::queue<Request> pending_requests_;
-  gaia::GaiaOAuthClient gaia_oauth_client_;
-  std::string refresh_token_;
-  CompletionCallback on_done_;
-
-  DISALLOW_COPY_AND_ASSIGN(OAuthClient);
+      CompletionCallback on_done) = 0;
 };
 
 }  // namespace remoting
 
-#endif  // REMOTING_HOST_SETUP_OAUTH_CLIENT
+#endif  // REMOTING_HOST_SETUP_OAUTH_CLIENT_H_