tests/parser/test_type_parser.py

@@ -1,38 +1,49 @@
 from jambo.parser._type_parser import GenericTypeParser
 
+import gc
+from contextlib import contextmanager
 from unittest import TestCase
 
 
+@contextmanager
+def with_test_parser():
+    class InvalidGenericTypeParser(GenericTypeParser):
+        mapped_type = str
+        json_schema_type = "type:invalid"
+
+        def from_properties(
+            self, name: str, properties: dict[str, any], required: bool = False
+        ): ...
+
+    try:
+        yield InvalidGenericTypeParser
+    finally:
+        del InvalidGenericTypeParser
+        gc.collect()
+
+
 class TestGenericTypeParser(TestCase):
-    def setUp(self):
-        class InvalidGenericTypeParser(GenericTypeParser):
-            mapped_type = str
-            json_schema_type = "type:invalid"
-
-            def from_properties(
-                self, name: str, properties: dict[str, any], required: bool = False
-            ): ...
-
-        if hasattr(self, "InvalidGenericTypeParser"):
-            delattr(self, "InvalidGenericTypeParser")
-        self.InvalidGenericTypeParser = InvalidGenericTypeParser
-
-    def tearDown(self):
-        del self.InvalidGenericTypeParser
-
     def test_invalid_get_impl(self):
         # Assuming GenericTypeParser is imported from the module
-        with self.assertRaises(ValueError):
+        with (
+            with_test_parser(),
+            self.assertRaises(ValueError),
+        ):
             GenericTypeParser._get_impl({"type": "another_invalid_type"})
 
     def test_invalid_json_schema_type(self):
-        self.InvalidGenericTypeParser.json_schema_type = None
-
         # This is more for the developer's sanity check
-        with self.assertRaises(RuntimeError):
+        with (
+            with_test_parser() as InvalidGenericTypeParser,
+            self.assertRaises(RuntimeError),
+        ):
+            InvalidGenericTypeParser.json_schema_type = None
             GenericTypeParser._get_impl({"type": "another_invalid_type"})
 
     def test_invalid_mappings_properties_builder(self):
-        parser = self.InvalidGenericTypeParser()
+        with (
-        with self.assertRaises(NotImplementedError):
+            with_test_parser() as InvalidGenericTypeParser,
+            self.assertRaises(NotImplementedError),
+        ):
+            parser = InvalidGenericTypeParser()
             parser.mappings_properties_builder({}, required=False)