2 files changed, 29 insertions, 0 deletions
diff --git a/pylint/testutils/functional/__init__.py b/pylint/testutils/functional/__init__.py
index a97eea0bb..607c22cb4 100644
--- a/pylint/testutils/functional/__init__.py
+++ b/pylint/testutils/functional/__init__.py
@@ -7,12 +7,14 @@ __all__ = [
     "get_functional_test_files_from_directory",
     "NoFileError",
     "parse_python_version",
+    "LintModuleOutputUpdate",
 ]
 
 from pylint.testutils.functional.find_functional_tests import (
     REASONABLY_DISPLAYABLE_VERTICALLY,
     get_functional_test_files_from_directory,
 )
+from pylint.testutils.functional.lint_module_output_update import LintModuleOutputUpdate
 from pylint.testutils.functional.test_file import (
     FunctionalTestFile,
     NoFileError,
diff --git a/pylint/testutils/functional/lint_module_output_update.py b/pylint/testutils/functional/lint_module_output_update.py
new file mode 100644
index 000000000..113f6448f
--- /dev/null
+++ b/pylint/testutils/functional/lint_module_output_update.py
@@ -0,0 +1,27 @@
+# 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
+
+import csv
+import os
+
+from pylint.testutils.lint_module_test import LintModuleTest
+
+
+class LintModuleOutputUpdate(LintModuleTest):
+    """If message files should be updated instead of checked."""
+
+    class TestDialect(csv.excel):
+        delimiter = ":"
+        lineterminator = "\n"
+
+    csv.register_dialect("test", TestDialect)
+
+    def _check_output_text(self, _, expected_output, actual_output):
+        if not expected_output and not actual_output:
+            if os.path.exists(self._test_file.expected_output):
+                os.remove(self._test_file.expected_output)
+            return
+        with open(self._test_file.expected_output, "w", encoding="utf-8") as f:
+            writer = csv.writer(f, dialect="test")
+            for line in actual_output:
+                writer.writerow(line.to_csv())