This element is to provide randomization for a test run sequence, rather than running the test sequentially, by adding random selector.
这个元素用来通过添加随机选择器，为一个测试运行序列提供随机选择，而不是按照测试顺序地运行。
2
Includes CSS selector support to improve test speed in ie.
包括CSS选择器支持，以改善在IE中的测试速度。
3
To report results directly, JUnit tests could implement test, but then they would lose the other features of TestCase (pluggable selector, fixture handling, rerunning test cases, etc.).