fix: invalid metric should raise an exception (#20882)

tests/integration_tests/fixtures/deck_geojson_form_data.json

@@ -43,5 +43,5 @@
   "granularity_sqla": null,
   "autozoom": true,
   "url_params": {},
-  "size": 100
+  "size": "100"
 }

tests/integration_tests/fixtures/deck_path_form_data.json

@@ -45,5 +45,5 @@
   "granularity_sqla": null,
   "autozoom": true,
   "url_params": {},
-  "size": 100
+  "size": "100"
 }

tests/integration_tests/viz_tests.py

@@ -716,7 +716,7 @@ class TestPairedTTest(SupersetTestCase):
         self.assertEqual(data, expected)
 
     def test_get_data_empty_null_keys(self):
-        form_data = {"groupby": [], "metrics": ["", None]}
+        form_data = {"groupby": [], "metrics": [""]}
         datasource = self.get_datasource_mock()
         # Test data
         raw = {}
@@ -739,19 +739,13 @@ class TestPairedTTest(SupersetTestCase):
                     "group": "All",
                 }
             ],
-            "NULL": [
-                {
-                    "values": [
-                        {"x": 100, "y": 10},
-                        {"x": 200, "y": 20},
-                        {"x": 300, "y": 30},
-                    ],
-                    "group": "All",
-                }
-            ],
         }
         self.assertEqual(data, expected)
 
+        form_data = {"groupby": [], "metrics": [None]}
+        with self.assertRaises(ValueError):
+            viz.viz_types["paired_ttest"](datasource, form_data)
+
 
 class TestPartitionViz(SupersetTestCase):
     @patch("superset.viz.BaseViz.query_obj")