my-vault/03_Resources/Development/Languages/Python/Mock Patching.md

Highlights:

Mock.patch will intercept import statements identified by a string, and return a Mock instance you can preconfigure using the techniques we discussed above.

we need to supply Mock.patch with a string representing our specific import. We do not want to supply simply os.getcwd since that would patch it for all modules, instead we want to supply the module under test’s import of os , i.e. work.os . When the module is imported patch will work its magic and return a Mock instead.