How google doing test - http://googletesting.blogspot.com/2011/02/how-google-tests-software-part-two.html http://www.infoq.com/news/2011/03/Ensuring-Product-Quality-Google http://googletesting.blogspot.com/2
011/03/how-google-tests-software-part-five.html

How facebook doing test? - http://www.quora.com/What-kind-of-automated-testing-does-Facebook-do

How to test map-reduce application - http://cornercases.wordpress.com/2011/04/08/unit-testing-mapreduce-with-the-adapter-pattern/

The Knightmare Explained - http://www.advancedtrading.com/algorithms/240005027 , http://www.nanex.net/aqck2/3525.html

Example of using mocking tools - http://martinfowler.com/articles/modernMockingTools.html

How sqlite tested - http://www.sqlite.org/testing.html

http://allankelly.blogspot.com.au/2014/06/how-do-i-make-testing-faster.html http://rkennke.wordpress.com/2012/03/29/test-driven-thermostat-development/

Story of testing with in-memory DB - https://keyholesoftware.com/2016/10/03/automated-integration-tests-failure-scenarios

http://www.developsense.com/blog/2018/12/if-we-do-sanity-testing-before-release-do-we-have-to-do-regression-testing/

What is an A/B Test? - https://netflixtechblog.com/what-is-an-a-b-test-b08cc1b57962

The complexity behind eradicating test flakiness - https://carloarg02.medium.com/when-sharks-chew-on-network-cables-c0cf8c8b015b