Fix get_numeric_assignment for boolean feature flag, should return None (#25)

* Add test for expected behavior

* Code change to fix test

* Run autoformat

Author: sameerank

eppo_client/variation_type.py

@@ -16,7 +16,9 @@ def is_expected_type(
         if expected_variation_type == cls.STRING:
             return isinstance(assigned_variation.typedValue, str)
         elif expected_variation_type == cls.NUMERIC:
-            return isinstance(assigned_variation.typedValue, Number)
+            return isinstance(assigned_variation.typedValue, Number) and not isinstance(
+                assigned_variation.typedValue, bool
+            )
         elif expected_variation_type == cls.BOOLEAN:
             return isinstance(assigned_variation.typedValue, bool)
         elif expected_variation_type == cls.JSON:

test/client_test.py

@@ -277,3 +277,14 @@ def get_assignments(test_case):
         )
         for subject in test_case.get("subjectsWithAttributes", [])
     ]
+
+
+@pytest.mark.parametrize("test_case", test_data)
+def test_get_numeric_assignment_on_bool_feature_flag_should_return_none(test_case):
+    if test_case["valueType"] == "boolean":
+        assignments = get_assignments(test_case=test_case)
+        assert assignments == test_case["expectedAssignments"]
+        # Change to get_numeric_assignment and try again
+        test_case["valueType"] = "numeric"
+        assignments = get_assignments(test_case=test_case)
+        assert assignments == [None] * len(test_case["expectedAssignments"])