James Whittaker, Jason Arbon, Jeff Carollo.
How Google Tests Software.
Addison Wesley. 2012
Testing at Google Scale
Hundreds of millions of lines of code distributed across billions of source files. Billions of build actions prompting millions of automated tests daily. Hundreds of thousands of browser instances daily. Apps released at a continuous pace. Ladies and gents, it doesn’t get more difficult than this (at least not by much).