fix error logout when session token expired time #132

[hocnguyen]

概要(Summary)

• Fixed セッショントークンの有効期限切れ時にlogoutが意図通りに完了しない #132 セッショントークンの有効期限切れ時にlogoutが意図通りに完了しない

動作確認手順(Step for Confirmation)

Run the unit test.

[ykokw]

@hocnguyen
Thank you for creating p-r!

Could you separate p-r for issue #161 or add description in p-r summary ?
And I can't find test code for this fixing.

[hocnguyen]

@ykokw
Thanks for your review.
I will separate to 2 p-r.

[hocnguyen]

@ykokw
I remove the code of issue 161.
This is only code fixing of issue 132.
Please help me review again!

[ykokw]

@hocnguyen
I've confirmed that your fixing is separated to 2 p-r. Thanks.
Could you add test code or tell me procedure for confirmation?

[hocnguyen]

@ykokw
About this issue, when we call logout function with a session token was expired or wrong.
The error will appear.
Base from description of issue. I reset session info to null value when error code response is 401.
Because In mbaas.yml file, we had declare logout function with response 200.
So I can`t create response 401 with logout function from test code.
That is reason i can`t add the test code.
But Please see example code bellow. That is my code test on this issue :

var user = new ncmb.User({userName:"Yamada Tarou", password:"password"});
			ncmb.User.login(user)
				.then(function(data){
                                   // reset wrong token to error appear when logout 
				    user.sessionToken="wrong token"; 
				    user.logout(function(err, res){
					  if(err){
						console.log(err);
					  }
					});
				})
				.catch(function(err){
				  // エラー処理
				});

[ykokw]

Because In mbaas.yml file, we had declare logout function with response 200.

上記、mbaas.ymlに401エラーが返るスタブを用意することで

• セッショントークンが期限切れなどで401エラーが返る場合に、ローカルにあるsessionTokenが削除されることを確認する

テストコードが実装可能になるかと思います。