Start writing tests for the config finder

tests/unit/test_config_file_finder.py

@@ -0,0 +1,11 @@
+"""Tests for the ConfigFileFinder."""
+import os
+
+from flake8.options import config
+
+
+def test_uses_default_args():
+    """Show that we default the args value."""
+    finder = config.ConfigFileFinder('flake8', None, [])
+    assert finder.args == ['.']
+    assert finder.parent == os.path.abspath('.')