Qt unit testing using Google Tests

[Archa4]

Well... I was going to use QTest, but then i was told, that Google Test is the better way to test.
But I think I can convince them that QTest is the way to do that, but then, can you redirect me to some documentation (preferably step-by-step) how to create those test?
For example have i to create new class in my project, or do I create new project, and how to link these tests, so I could test my classes...