test: pylint kotoha checker

Author: ftnext

pylint/test_kotoha_plugin.py

@@ -0,0 +1,27 @@
+import astroid
+import pylint.testutils
+
+import kotoha_plugin
+
+
+class TestArgumentListTypeHintChecker(pylint.testutils.CheckerTestCase):
+    CHECKER_CLASS = kotoha_plugin.ArgumentListTypeHintChecker
+
+    def test_find_argument_list_type_hint(self):
+        node = astroid.extract_node("""\
+def plus_one(numbers: list[int]) -> list[int]:
+    return [n + 1 for n in numbers]
+""")
+
+        with self.assertAddsMessages(
+            pylint.testutils.MessageTest(
+                msg_id="avoid-list-arg-type",
+                node=node.args.annotations[0],
+                args=("list",),
+                line=1,
+                col_offset=22,
+                end_line=1,
+                end_col_offset=31,
+            )
+        ):
+            self.checker.visit_arguments(node.args)