Simplify transformer test

Related: #3818

src/ansiblelint/file_utils.py

@@ -374,7 +374,10 @@ def write(self, *, force: bool = False) -> None:
         if not force and not self.updated:
             # No changes to write.
             return
-        self.path.expanduser().resolve().write_text(
+        dump_filename = self.path.expanduser().resolve()
+        if os.environ.get("ANSIBLE_LINT_WRITE_TMP", "0") == "1":
+            dump_filename = dump_filename.with_suffix(f".tmp{dump_filename.suffix}")
+        dump_filename.write_text(
             self._content or "",
             encoding="utf-8",
         )

src/ansiblelint/rules/deprecated_local_action.py

@@ -5,16 +5,16 @@
 
 import copy
 import logging
+import os
 import sys
+from pathlib import Path
 from typing import TYPE_CHECKING
 
 from ansiblelint.rules import AnsibleLintRule, TransformMixin
 from ansiblelint.runner import get_matches
 from ansiblelint.transformer import Transformer
 
 if TYPE_CHECKING:
-    from pathlib import Path
-
     from ruamel.yaml.comments import CommentedMap, CommentedSeq
 
     from ansiblelint.config import Options
@@ -84,6 +84,8 @@ def transform(
 
 # testing code to be loaded only with pytest or when executed the rule file
 if "pytest" in sys.modules:
+    from unittest import mock  # pylint: disable=ungrouped-imports
+
     from ansiblelint.rules import RulesCollection  # pylint: disable=ungrouped-imports
     from ansiblelint.runner import Runner  # pylint: disable=ungrouped-imports
 
@@ -97,16 +99,16 @@ def test_local_action(default_rules_collection: RulesCollection) -> None:
         assert len(results) == 1
         assert results[0].tag == "deprecated-local-action"
 
+    @mock.patch.dict(os.environ, {"ANSIBLE_LINT_WRITE_TMP": "1"}, clear=True)
     def test_local_action_transform(
         config_options: Options,
-        copy_examples_dir: tuple[Path, Path],
         default_rules_collection: RulesCollection,
     ) -> None:
         """Test transform functionality for no-log-password rule."""
-        playbook: str = "examples/playbooks/tasks/local_action.yml"
+        playbook = Path("examples/playbooks/tasks/local_action.yml")
         config_options.write_list = ["all"]
 
-        config_options.lintables = [playbook]
+        config_options.lintables = [str(playbook)]
         runner_result = get_matches(
             rules=default_rules_collection,
             options=config_options,
@@ -117,14 +119,12 @@ def test_local_action_transform(
         matches = runner_result.matches
         assert len(matches) == 3
 
-        orig_dir, tmp_dir = copy_examples_dir
-        orig_playbook = orig_dir / playbook
-        expected_playbook = orig_dir / playbook.replace(".yml", ".transformed.yml")
-        transformed_playbook = tmp_dir / playbook
-
-        orig_playbook_content = orig_playbook.read_text()
-        expected_playbook_content = expected_playbook.read_text()
-        transformed_playbook_content = transformed_playbook.read_text()
+        orig_content = playbook.read_text()
+        expected_content = playbook.with_suffix(
+            f".expected{playbook.suffix}",
+        ).read_text()
+        transformed_content = playbook.with_suffix(f".tmp{playbook.suffix}").read_text()
 
-        assert orig_playbook_content != transformed_playbook_content
-        assert transformed_playbook_content == expected_playbook_content
+        assert orig_content != transformed_content
+        assert expected_content == transformed_content
+        playbook.with_suffix(f".tmp{playbook.suffix}").unlink()