[PYTHON] Fix for failing to lookup discriminator value using AllOf and discriminator (#18498)

* fix issue 18495

* add tests and update samples

* update samples

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/test/test_base_discriminator.py

@@ -0,0 +1,52 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501
+
+
+import unittest
+import datetime
+
+from petstore_api.models.base_discriminator import BaseDiscriminator  # noqa: E501
+
+class TestBaseDiscriminator(unittest.TestCase):
+    """BaseDiscriminator unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional) -> BaseDiscriminator:
+        """Test BaseDiscriminator
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `BaseDiscriminator`
+        """
+        model = BaseDiscriminator()  # noqa: E501
+        if include_optional:
+            return BaseDiscriminator(
+                type_name = ''
+            )
+        else:
+            return BaseDiscriminator(
+        )
+        """
+
+    def testBaseDiscriminator(self):
+        """Test BaseDiscriminator"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/test/test_info.py

@@ -0,0 +1,52 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501
+
+
+import unittest
+import datetime
+
+from petstore_api.models.info import Info  # noqa: E501
+
+class TestInfo(unittest.TestCase):
+    """Info unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional) -> Info:
+        """Test Info
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `Info`
+        """
+        model = Info()  # noqa: E501
+        if include_optional:
+            return Info(
+                val = petstore_api.models.base_discriminator.BaseDiscriminator()
+            )
+        else:
+            return Info(
+        )
+        """
+
+    def testInfo(self):
+        """Test Info"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/test/test_primitive_string.py

@@ -0,0 +1,52 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501
+
+
+import unittest
+import datetime
+
+from petstore_api.models.primitive_string import PrimitiveString  # noqa: E501
+
+class TestPrimitiveString(unittest.TestCase):
+    """PrimitiveString unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional) -> PrimitiveString:
+        """Test PrimitiveString
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `PrimitiveString`
+        """
+        model = PrimitiveString()  # noqa: E501
+        if include_optional:
+            return PrimitiveString(
+                value = ''
+            )
+        else:
+            return PrimitiveString(
+        )
+        """
+
+    def testPrimitiveString(self):
+        """Test PrimitiveString"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()