Found 2 books

Effective Testing With RSpec 3 · Build Ruby Apps With Confidence

[en] Effective Testing With RSpec 3 · Build Ruby Apps With Confidence Pragmatic Bookshelf

Marston, Myron & Dees, Ian

download read it!
Effective Testing With RSpec 3

[en] Effective Testing With RSpec 3 Pragmatic Bookshelf

Marston, Myron

download read it!