From f3cfc2244991de99d74c78d387dffacd9e93d788 Mon Sep 17 00:00:00 2001
From: Jan-Lukas Wynen <jan-lukas.wynen@ess.eu>
Date: Tue, 17 Mar 2026 13:19:07 +0100
Subject: [PATCH] Add hook to check test file names

---
 .pre-commit-config.yaml       |  7 +++++++
 tools/check-test-file-name.py | 21 +++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 tools/check-test-file-name.py

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ebffcb5c..bf65b69f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,6 +14,13 @@ repos:
       - id: trailing-whitespace
         args: [ --markdown-linebreak-ext=md ]
         exclude: '\.svg'
+  - repo: local
+    hooks:
+      - id: check-test-file-name
+        name: check test file name convention
+        entry: python tools/check-test-file-name.py
+        language: python
+        files: '(tests/.*\.py)$'
   - repo: https://github.com/kynan/nbstripout
     rev: 0.7.1
     hooks:
diff --git a/tools/check-test-file-name.py b/tools/check-test-file-name.py
new file mode 100644
index 00000000..b5dce929
--- /dev/null
+++ b/tools/check-test-file-name.py
@@ -0,0 +1,21 @@
+from pathlib import Path
+import sys
+
+ALLOWED_NAMES = ("conftest.py",)
+
+
+def main():
+    errors = False
+    paths = map(Path, sys.argv[1:])
+    for path in paths:
+        if path.name in ALLOWED_NAMES:
+            continue
+        if not path.stem.endswith("_test"):
+            sys.stderr.write(f"Bad test file name: {path}\n")
+            errors = True
+
+    sys.exit(int(errors))
+
+
+if __name__ == "__main__":
+    main()