Create ``_config_initialization`` util and use in functional tests (#5591)

3 files changed, 27 insertions, 0 deletions

diff --git a/tests/testutils/data/init_hook.py b/tests/testutils/data/init_hook.py
new file mode 100644
index 000000000..f16492d3a
--- /dev/null
+++ b/tests/testutils/data/init_hook.py
@@ -0,0 +1,3 @@
+"""This file should never be tested as the init-hook in the configuration
+file prevents the test runner from getting here.
+"""
diff --git a/tests/testutils/data/init_hook.rc b/tests/testutils/data/init_hook.rc
new file mode 100644
index 000000000..b0efa254b
--- /dev/null
+++ b/tests/testutils/data/init_hook.rc
@@ -0,0 +1,3 @@
+[MASTER]
+
+init-hook=raise RuntimeError
diff --git a/tests/testutils/test_functional_testutils.py b/tests/testutils/test_functional_testutils.py
new file mode 100644
index 000000000..c1e852e15
--- /dev/null
+++ b/tests/testutils/test_functional_testutils.py
@@ -0,0 +1,21 @@
+# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
+
+"""Tests for the functional test framework."""
+
+from pathlib import Path
+
+import pytest
+
+from pylint import testutils
+from pylint.testutils.functional import FunctionalTestFile
+
+HERE = Path(__file__).parent
+DATA_DIRECTORY = HERE / "data"
+
+
+def test_parsing_of_pylintrc_init_hook() -> None:
+    """Test that we correctly parse an init-hook in a settings file."""
+    with pytest.raises(RuntimeError):
+        test_file = FunctionalTestFile(str(DATA_DIRECTORY), "init_hook.py")
+        testutils.LintModuleTest(test_file)