delete old coverage files each test run

Author: Archmonger

pyproject.toml

@@ -88,6 +88,7 @@ run = [
   "pytest{env:HATCH_TEST_ARGS:} {args}",
 ]
 run-cov = [
+  'hatch --env default run "src/build_scripts/delete_old_coverage.py"',
   'hatch --env default run "src/build_scripts/install_playwright.py"',
   "hatch --env default build -t wheel",
   "coverage run -m pytest{env:HATCH_TEST_ARGS:} {args}",

src/build_scripts/delete_old_coverage.py

@@ -0,0 +1,21 @@
+# /// script
+# requires-python = ">=3.11"
+# dependencies = []
+# ///
+
+import logging
+from glob import glob
+from pathlib import Path
+
+# Delete old `.coverage*` files in the project root
+print("Deleting old coverage files...")  # noqa: T201
+root_dir = Path(__file__).parent.parent.parent
+coverage_files = glob(str(root_dir / ".coverage*"))
+
+for path in coverage_files:
+    coverage_file = Path(path)
+    if coverage_file.exists():
+        try:
+            coverage_file.unlink()
+        except Exception as e:
+            logging.error(f"Failed to delete {coverage_file}: {e}")