NiceMock vs StrickMock

[Brenda Martis]

Can someone explain difference between nicemock and strickmock?

[Alex Shaver]

Before moving to github, the documentation used to have a lot better table of contents/indexing. This is what you're looking for:
https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#the-nice-the-strict-and-the-naggy

tl;dr: nice mocks suppress warnings about unexpected calls, strict mocks fail tests on unexpected calls. That's how I saw them at least.