Merge pull request #853 from adamtheturtle/custom-linter

Add meta test for __init__ file

Author: adamtheturtle

tests/test_meta.py

@@ -0,0 +1,22 @@
+"""
+Tests for this repository.
+"""
+
+from pathlib import Path
+
+
+def test_init_files() -> None:
+    """
+    ``__init__`` files exist where they should do.
+
+    If ``__init__`` files are missing, linters may not run on all files that
+    they should run on.
+    """
+    directories = (Path('src'), Path('tests'))
+
+    for directory in directories:
+        files = directory.glob('**/*.py')
+        for python_file in files:
+            parent = python_file.parent
+            expected_init = parent / '__init__.py'
+            assert expected_init.exists()