Add maintainance script for finding unused test files. NFC (emscripten-core#20434)

sbc100 · web-flow · commit e63dca9852af · 2023-10-10T15:54:33.000-07:00
diff --git a/tools/maint/find_unused_test_files.py b/tools/maint/find_unused_test_files.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+"""Search the test directory for un-referenced files.
+
+This might be slow because it runs a `git grep` for every
+file in the test directory.
+"""
+
+import os
+import sys
+import subprocess
+
+script_dir = os.path.dirname(os.path.abspath(__file__))
+root_dir = os.path.dirname(os.path.dirname(script_dir))
+
+ignore_files = {'runner.bat'}
+
+
+def clear_line():
+  if sys.stdout.isatty():
+    sys.stdout.write('\x1b[2K\r')
+
+
+def main():
+  all_files = subprocess.check_output(['git', 'ls-files', 'test'], encoding='utf-8', cwd=root_dir).split('\n')
+  for i, filename in enumerate(all_files):
+    if sys.stdout.isatty():
+      clear_line()
+      sys.stdout.write(f'checking [{i}/{len(all_files)}] ({filename})')
+    sys.stdout.flush()
+    dirname, basename = os.path.split(filename)
+    if basename in ignore_files:
+      continue
+    ext = os.path.splitext(filename)[1]
+    if basename.startswith('test_') and ext == '.py':
+      continue
+    lookfor = basename
+    if ext == '.out':
+      lookfor = os.path.splitext(basename)[1]
+    rtn = subprocess.call(['git', 'grep', '--quiet', lookfor, 'test'], cwd=root_dir)
+    if rtn != 0:
+      if sys.stdout.isatty():
+        clear_line()
+      print(f'Not found: {basename}')
+
+
+if __name__ == '__main__':
+  sys.exit(main())
