converters(test): add import logic

tests/unit/test_converters.py

@@ -1,9 +1,16 @@
 # Standard library imports
 import typing
+import sys
 
 # Third-party imports
 import marshmallow
-import pydantic
+
+try:
+    import pydantic
+except ImportError:
+    if sys.version_info >= (3, 6):
+        raise
+
 import pytest
 
 # Local imports
@@ -451,18 +458,19 @@ def test_dict_converter(self):
         assert output == "1"
 
 
-@pytest.fixture
-def pydantic_model_mock(mocker):
-    class Model(pydantic.BaseModel):
-        def __new__(cls, *args, **kwargs):
-            return model
-
-    model = mocker.Mock(spec=Model)
-
-    return model, Model
+@pytest.mark.skipif(
+    sys.version_info < (3, 6), reason="requires python3.6 or higher"
+)
+class TestPydanticConverter(object):
+    @pytest.fixture
+    def pydantic_model_mock(self, mocker):
+        class Model(pydantic.BaseModel):
+            def __new__(cls, *args, **kwargs):
+                return model
 
+        model = mocker.Mock(spec=Model)
+        return model, Model
 
-class TestPydanticConverter(object):
     def test_init_without_pydantic(self, mocker):
         mocker.patch.object(
             converters.PydanticConverter,