move test_missing_mongetter and mark it as a mongodb core test

Author: shaypal5

tests/test_core_lookup.py

@@ -33,13 +33,3 @@ def test_bad_name():
         @cachier(backend=invalid_core)
         def dummy_func():
             pass
-
-
-def test_missing_mongetter():
-    # Test that the appropriate exception is thrown
-    # when forgetting to specify the mongetter.
-    with pytest.raises(MissingMongetter):
-
-        @cachier(backend="mongo", mongetter=None)
-        def dummy_func():
-            pass

tests/test_mongo_core.py

@@ -120,6 +120,17 @@ def _test_mongetter():
 # === Mongo core tests ===
 
 
+@pytest.mark.mongo
+def test_missing_mongetter():
+    # Test that the appropriate exception is thrown
+    # when forgetting to specify the mongetter.
+    with pytest.raises(MissingMongetter):
+
+        @cachier(backend="mongo", mongetter=None)
+        def dummy_func():
+            pass
+
+
 @pytest.mark.mongo
 def test_information():
     print("\npymongo version: ", end="")