Refactor 'check_configuration_file_reader' so we can assert other files

Necessary prior to #4720

Author: Pierre-Sassoulas

tests/config/test_config.py

@@ -2,16 +2,15 @@
 import os
 import unittest.mock
 from pathlib import Path
-from typing import Union
+from typing import Optional, Set, Union
 
 import pylint.lint
 from pylint.lint.run import Run
 
-
-def check_configuration_file_reader(config_file: Union[str, Path]) -> Run:
-    """Initialize pylint with the given configuration file and check that
-    what we initialized the linter with what was expected.
-    """
+def get_runner_from_config_file(
+    config_file: Union[str, Path], expected_exit_code: int = 0
+) -> Run:
+    """Initialize pylint with the given configuration file and return the Run"""
     args = ["--rcfile", str(config_file), __file__]
     # If we used `pytest.raises(SystemExit)`, the `runner` variable
     # would not be accessible outside the `with` block.
@@ -22,16 +21,24 @@ def check_configuration_file_reader(config_file: Union[str, Path]) -> Run:
         # in `_msg_states`, used by `is_message_enabled`.
         with unittest.mock.patch("pylint.lint.pylinter.check_parallel"):
             runner = pylint.lint.Run(args)
+    mocked_exit.assert_called_once_with(expected_exit_code)
+    return runner
+
 
-    # "logging-not-lazy" and "logging-format-interpolation"
-    expected_disabled = {"W1201", "W1202"}
+def check_configuration_file_reader(
+    runner: Run,
+    expected_disabled: Optional[Set[str]] = None,
+    expected_jobs: int = 10,
+    expected_reports_truthey: bool = True,
+) -> None:
+    """Check that what we initialized the linter with what was expected."""
+    if expected_disabled is None:
+        # "logging-not-lazy" and "logging-format-interpolation"
+        expected_disabled = {"W1201", "W1202"}
     for msgid in expected_disabled:
         assert not runner.linter.is_message_enabled(msgid)
-    assert runner.linter.config.jobs == 10
-    assert runner.linter.config.reports
-
-    mocked_exit.assert_called_once_with(0)
-    return runner
+    assert runner.linter.config.jobs == expected_jobs
+    assert bool(runner.linter.config.reports) == expected_reports_truthey
 
 
 def test_can_read_ini(tmp_path: Path) -> None:
@@ -45,7 +52,8 @@ def test_can_read_ini(tmp_path: Path) -> None:
 reports = yes
 """
     )
-    check_configuration_file_reader(config_file)
+    run = get_runner_from_config_file(config_file)
+    check_configuration_file_reader(run)
 
 
 def test_can_read_setup_cfg(tmp_path: Path) -> None:
@@ -60,7 +68,8 @@ def test_can_read_setup_cfg(tmp_path: Path) -> None:
 reports = yes
 """
     )
-    check_configuration_file_reader(config_file)
+    run = get_runner_from_config_file(config_file)
+    check_configuration_file_reader(run)
 
 
 def test_can_read_toml(tmp_path: Path) -> None:
@@ -75,7 +84,8 @@ def test_can_read_toml(tmp_path: Path) -> None:
 reports = "yes"
 """
     )
-    check_configuration_file_reader(config_file)
+    run = get_runner_from_config_file(config_file)
+    check_configuration_file_reader(run)
 
 
 def test_can_read_toml_rich_types(tmp_path: Path) -> None:
@@ -94,7 +104,8 @@ def test_can_read_toml_rich_types(tmp_path: Path) -> None:
 reports = true
 """
     )
-    check_configuration_file_reader(config_file)
+    run = get_runner_from_config_file(config_file)
+    check_configuration_file_reader(run)
 
 
 def test_can_read_toml_env_variable(tmp_path: Path) -> None:
@@ -110,4 +121,5 @@ def test_can_read_toml_env_variable(tmp_path: Path) -> None:
     )
     env_var = "tmp_path_env"
     os.environ[env_var] = str(config_file)
-    check_configuration_file_reader(f"${env_var}")
+    run = get_runner_from_config_file(f"${env_var}")
+    check_configuration_file_reader(run)