Made save load tests more robust to new params

Author: Louiszr

python/pyspark/ml/tests/test_tuning.py

@@ -230,6 +230,10 @@ def test_save_load_trained_model(self):
         ]:
             self.assertEqual(param(cvModel), param(loadedCvModel))
 
+        self.assertTrue(all(
+            loadedCvModel.isSet(param) for param in loadedCvModel.params
+        ))
+
     def test_save_load_simple_estimator(self):
         temp_path = tempfile.mkdtemp()
         dataset = self.spark.createDataFrame(
@@ -602,6 +606,10 @@ def test_save_load_trained_model(self):
         ]:
             self.assertEqual(param(tvsModel), param(loadedTvsModel))
 
+        self.assertTrue(all(
+            loadedTvsModel.isSet(param) for param in loadedTvsModel.params
+        ))
+
     def test_save_load_simple_estimator(self):
         # This tests saving and loading the trained model only.
         # Save/load for TrainValidationSplit will be added later: SPARK-13786