I interview Harry Percival, author of "Test-Driven Development with Python". We discuss: * testing django with unittest and pytest * layers of testing (test p

I interview Harry Percival, author of "Test-Driven Development with Python". We discuss: * testing django with unittest and pytest * layers of testing (test pyramid) including functional testing with Selenium, integration tests, and unit test. * where tests should live * test isolation * testing by development team without a QA group * double loop TDD * having Harry's book available for free