Captcha in unit tests, how to enter?

Question

Unit testing

There is a set of modules that communicate with external resources via their API.
Usually communication with them takes place in the normal mode, but sometimes they request a captcha.
How can I implement its input in a unit test?

Answer 1

there are a lot of services for recognizing captcha for a small denyuzhku

Answer 2

Not quite clear task. A unit test should not depend on external resources, otherwise it is not a unit test.