Testing is harder than Development

Testing is harder than developing. If you want to have good testing you need to put your best people in testing

- Gerald Weinberg, Test Talks (2016)

In my experience great developers do not always make great testers, but great testers (who also have strong design skills) can make great developers.

- Patrick Copeland, Google's Senior Director of Engineering Productivity, Interview 'Testing with the limits'(2010)

Hiring testers who can code features is difficult; finding feature developers who can test is even more difficult.

- Patrick Copeland's forward of book How Google Tests Software (2012), Addison-Wesley Professional