Merge pull request #7496 from bluetech/typing-idfn

Fix typing of params ids callable form

testing/typing_checks.py

@@ -0,0 +1,24 @@
+"""File for checking typing issues.
+
+This file is not executed, it is only checked by mypy to ensure that
+none of the code triggers any mypy errors.
+"""
+import pytest
+
+
+# Issue #7488.
+@pytest.mark.xfail(raises=RuntimeError)
+def check_mark_xfail_raises() -> None:
+    pass
+
+
+# Issue #7494.
+@pytest.fixture(params=[(0, 0), (1, 1)], ids=lambda x: str(x[0]))
+def check_fixture_ids_callable() -> None:
+    pass
+
+
+# Issue #7494.
+@pytest.mark.parametrize("func", [str, int], ids=lambda x: str(x.__name__))
+def check_parametrize_ids_callable(func) -> None:
+    pass