We know our test to be relatively independent from other parts of the system.

For example, running a test shouldn't generally call a credit card processing API and talk to a database

when our goal is just to test the argument validation.

And yet, your method that you want to test, it does all three of those things and more.

What do you do?

Some languages use elaborate dependency passing mechanisms

and frameworks that go under the banner of inversion of control and dependency injection. In Python,

we do sometimes have that, but it's much more common to just temporarily redefine what those

two functions do using patching and mocking. On this episode, we welcome back and Elena Popkas to talk us through the whole spectrum of

test doubles, dummies, mocks, and more.

This is Talk Python to Me, episode 287 recorded August 24th, 2020.

Music Welcome. Welcome to Talk Python to me, a weekly podcast on Python, the language, the libraries, the ecosystem, and the personalities. This is your host, Michael Kennedy.

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