TST: Ensure pytest assertion rewriting occurs in subprocesses

QuLogic · QuLogic · commit a7518beccee4 · 2025-10-22T20:30:52.000-04:00
This means that:
1. assertion failures look a little better
2. assertions actually happen if optimization is enabled
diff --git a/lib/matplotlib/testing/__init__.py b/lib/matplotlib/testing/__init__.py
@@ -139,6 +139,8 @@ def subprocess_run_helper(func, *args, timeout, extra_env=None):
         [
             sys.executable,
             "-c",
+            f"import pytest;"
+            f"pytest.register_assert_rewrite({module!r});"
             f"import importlib.util;"
             f"_spec = importlib.util.spec_from_file_location({module!r}, {file!r});"
             f"_module = importlib.util.module_from_spec(_spec);"

Original file line number	Diff line number	Diff line change
`@@ -139,6 +139,8 @@ def subprocess_run_helper(func, *args, timeout, extra_env=None):`
`139`	`139`	`[`
`140`	`140`	`sys.executable,`
`141`	`141`	`"-c",`
	`142`	`+ f"import pytest;"`
	`143`	`+ f"pytest.register_assert_rewrite({module!r});"`
`142`	`144`	`f"import importlib.util;"`
`143`	`145`	`f"_spec = importlib.util.spec_from_file_location({module!r}, {file!r});"`
`144`	`146`	`f"_module = importlib.util.module_from_spec(_spec);"`