[functional tests] Only count python files for the reasonably displayable limit (#10490)

Co-authored-by: Marc Mueller <[email protected]>

Author: Pierre-Sassoulas

pylint/testutils/functional/find_functional_tests.py

@@ -10,18 +10,20 @@
 
 from pylint.testutils.functional.test_file import FunctionalTestFile
 
-REASONABLY_DISPLAYABLE_VERTICALLY = 49
-"""'Wet finger' number of files that are reasonable to display by an IDE.
+REASONABLY_DISPLAYABLE_VERTICALLY = 40
+"""'Wet finger' number of python files that are reasonable to have in a functional test
+directory.
 
 'Wet finger' as in 'in my settings there are precisely this many'.
+Initially the total number of files then we started counting only the python files to
+avoid moving a lot of files.
 """
 
 IGNORED_PARENT_DIRS = {
     "deprecated_relative_import",
     "ext",
     "regression",
     "regression_02",
-    "used_02",
 }
 """Direct parent directories that should be ignored."""
 
@@ -71,7 +73,9 @@ def _get_files_from_dir(
     ) -> list[Path]:
         """Return directories and files from a directory and handles violations."""
         files_without_leading_underscore = list(
-            p for p in path.iterdir() if not p.stem.startswith("_")
+            p
+            for p in path.iterdir()
+            if not (p.stem.startswith("_") or (p.is_file() and p.suffix != ".py"))
         )
         if len(files_without_leading_underscore) > max_file_per_directory:
             violations.append((path, len(files_without_leading_underscore)))
@@ -86,7 +90,6 @@ def walk(path: Path) -> Iterator[Path]:
         )
         for _file_or_dir in parent_dir_files:
             if _file_or_dir.is_dir():
-                _files = _get_files_from_dir(_file_or_dir, violations)
                 yield _file_or_dir.resolve()
                 try:
                     yield from walk(_file_or_dir)

tests/functional/u/used_02/used_before_assignment_py313.py renamed to tests/functional/u/used/used_before_assignment_py313.py

@@ -85,13 +85,14 @@ def test_get_functional_test_files_from_crowded_directory() -> None:
         get_functional_test_files_from_directory(
             DATA_DIRECTORY / "m", max_file_per_directory=1
         )
-    assert exc_info.match("m: 4 when the max is 1")
-    assert exc_info.match("max_overflow: 3 when the max is 1")
+    assert exc_info.match("m: 3 when the max is 1")
+    assert exc_info.match("max_overflow: 2 when the max is 1")
+    assert len(exc_info.value.args[0].splitlines()) == 3
     with pytest.raises(AssertionError) as exc_info:
         get_functional_test_files_from_directory(
-            DATA_DIRECTORY / "m", max_file_per_directory=3
+            DATA_DIRECTORY / "m", max_file_per_directory=2
         )
-    assert exc_info.match("m: 4 when the max is 3")
+    assert exc_info.match("m: 3 when the max is 2")
     assert "max_overflow" not in str(exc_info.value)