Add tests to log.py

[williamFalcon]

No description provided.

[yuqli]

This looks like something I can handle as a beginner project. If it is still needed, can I sign up for this task? Thanks, Yuqiong.

[williamFalcon]

@yuqli ok perfect. Feel free to fork, work and submit a PR when ready. I marked this issue as in-progress in the projects page.

[yuqli]

Sure, I'll work on this over the weekend and update progress on Saturday night. -- Yuqiong William Falcon <notifications@github.com> 于2018年10月24日周三 下午8:56写道：

…

@yuqli <https://github.com/yuqli> ok perfect. Feel free to fork, work and submit a PR when ready. I marked this issue as in-progress in the projects page. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#25 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANBToKpgAQhgzilJquvXlAbynHNeuZmZks5uoQxKgaJpZM4TkTFN> .