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Run type checkers on specified test files

Project description

pytest-typechecker

this is a plugin for pytest that allows you to create tests that verify how a type checker responds to your code.

This currently supports these type checkers:

  • pyright
  • mypy

File name format

this plugin looks for files starting with test and ending with types.py or types_xfail.py. for example test_something_types.py

global xfail

if you want to mark the hole test as xfail end it with types_xfail.py, for example.

# test_wrong_types_xfail.py

x: 123 = "abc"
y: str = 123

Only run specific checkers

if you include the name of a checker with _ around it only those checkers will be run. for example test_recursion_pyright_types.py

xfail specific checkers

if you provide a x before the checker name, it will be run in xfail mode. for example test_recursion_xmypy_types.py will run all checkers, but mark the mypy one as xfail

if you only want to run mypy and have it be xfail use this workaround: test_recursion_mypy_types_xfail.py

this can be combined, for example test_recursion_pyright_xmypy_types.py will run only pyright and mypy, but run mypy in xfail mode.

dont run specific checkers

if you provide a n before the checker name, it will not be run. for example test_recursion_nmypy_types.py will run all checkers, except mypy.

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