I guess you need to download junit library jar and add it to module settings of your project which you can get pressing Shift+Ctrl+Alt+S
In the module settings itself you need to select your test folders. Select the test folders and click on the test sources button on the top
To create a test for a corresponding class press Shift+Ctrl+T.
I dont think there are any live templates you may need to create it. Press Ctrl+Alt+S and go to live templates and create one looking into other templates for examples.
