Selenium Webdriver Learning (vi)---action frame window

First, the code implementation

Second, the realization principle

Please refer to the comments section

Third, the problems encountered

Start in the process of running, always prompt null pointer exception

Reason: The @beforemehtod was written @before

The former belongs to the tsetng, the latter belonging to JUnit

Iv. Summary

Main methods: Getwindowhandle (), Dr.switchto (). window (ParentID);

The method through which the caption is GetTitle (), through the content of the method is Getpagesource ()

Selenium Webdriver Learning (vi)---action frame window