FIX: add test with non conformity score

mapie/conformity_scores/conformity_scores.py

@@ -205,7 +205,7 @@ def get_quantile(
             ``alpha`` is the complement of the target coverage level.
 
         method: str
-            Method between ``lower'' and ``upper'' to find the quantile
+            Method between ``lower'' and ``higher'' to find the quantile
             in the lower or upper part of the distribution.
 
         Returns

mapie/tests/test_regression.py

@@ -601,7 +601,6 @@ def test_wrong_cv_with_fitted_conformity_score(cv: Any) -> None:
         match=r".*Incompatible with cv different of prefit.*",
     ):
         mapie_reg.fit(X, y)
-        mapie_reg.predict(X, alpha=0.05)
 
 
 @pytest.mark.parametrize("cv", ["prefit"])
@@ -616,7 +615,15 @@ def test_wrong_not_fitted_conformity_score(cv: Any) -> None:
         match=r".*instance is not fitted yet.*",
     ):
         mapie_reg.fit(X, y)
-        mapie_reg.predict(X, alpha=0.05)
+
+
+def test_wrong_conformity_score() -> None:
+    mapie_reg = MapieRegressor(conformity_score=object())
+    with pytest.raises(
+        ValueError,
+        match=r".*Invalid conformity_score argument.*",
+    ):
+        mapie_reg.fit(X, y)
 
 
 @pytest.mark.parametrize("cv", ["prefit"])