Explain test setup in documentation.
Explain test setup in documentation.

joshsoftware/github,GistBox/github,peter-murach/github,MalachiTatum/github,wicky-info/github,anabhilash619/github,yaoxiaoyong/github,davengeo/github,befairyliu/github,piotrmurach/github,samphilipd/github,firstval/github,cocktail-io/github,durai145/github