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pytest-cache
It seems to be a tool to cache func/args->result pairs and even persist them between testsuite-runs. Which seems like a great idea to speed things up. However I haven't noticed any mention of automatically detecting a change of a function source code and invalidating corresponding cache entries. That seems to defeat the purpose of running the test suite, because the tested code changes are not going to be reflected.
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The default cache directory has been renamed from .cache to .pytest_cache after community feedback that the name .cache did not make it clear that it was used by pytest. According to the docs, pytest-cache was integrated in pytest 2.8, and the plugin provides two command line options to rerun failures from the last pytest invocation:
For cleanup (usually not needed), a --cache-clear option allows to remove all cross-session cache contents ahead of a test run. Since pytest version 3.8.1 (2018-09-22) .pytest_cache directory contains its own .gitignore file and is automatically ignored by Git. ( see more)
Pytest is quick and easy to learn. Pytest can choose to run a particular test method or all the test methods of a particular test file based on conditions. Pytest is capable of skipping a few test methods out of all the test methods during test execution. Pytest can be used to test a wide range of applications on API, database and so on.
The advantages of pytest framework are listed below − Pytest is capable of executing multiple test cases simultaneously, thereby reducing the execution duration. Pytest is capable of skipping a test method from a group of test methods during execution.
pytest-cache does two things:
offer a mechanism through which other plugins can get/set values via config.cache.get|set. This is used by pytest-pep8 and pytest-flakes for example to store the mtime of the last check to avoid re-checking files all the time.
store test failures so that you can run --lf to run only the last failures and --ff to run the last failures first, then the rest of the tests.
The functionality is bound to move to the core with pytest-2.7 (not released as of today) or a subsequent release.
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