[POSTMAN] Add Samples GitHub workflow (#17412)

* Add Python tests

* Add workflow to verify Postman samples

* Correct path

samples/schema/postman-collection/python/test/test_parameters.py

@@ -0,0 +1,32 @@
+"""
+    Testing Postman generator output
+"""
+from __future__ import absolute_import
+
+import unittest
+
+import json
+
+
+class TestParameters(unittest.TestCase):
+
+    def setUp(self):
+        with open('./postman.json', 'r') as file:
+            self.json_data = json.load(file)
+
+    def tearDown(self):
+        pass
+
+    def test_request_parameter_description(self):
+        # request url
+        request = self.json_data['item'][2]['item'][1]['item'][0]['request']
+        self.assertEqual(request['url']['raw'], '{{baseUrl}}/users/')
+        # first query parameter
+        self.assertEqual(request['url']['query'][0]['key'], 'pUserId')
+        self.assertEqual(request['url']['query'][0]['value'], '888')
+        self.assertEqual(request['url']['query'][0]['description'], 'Query Id.')
+        self.assertEqual(request['url']['query'][0]['disabled'], False)
+
+
+if __name__ == '__main__':
+    unittest.main()