Tests for idx.array and idx.values immutability

Author: ivirshup

pandas/tests/indexes/test_any_index.py

@@ -34,6 +34,20 @@ def test_mutability(indices):
         indices[0] = indices[0]
 
 
+def test_values_mutability(indices):
+    if not len(indices):
+        return
+    with pytest.raises(ValueError):
+        indices.values[0] = indices[0]
+
+
+def test_array_mutability(indices):
+    if not len(indices):
+        return
+    with pytest.raises(ValueError):
+        indices.array[0] = indices[0]
+
+
 def test_wrong_number_names(indices):
     names = indices.nlevels * ["apple", "banana", "carrot"]
     with pytest.raises(ValueError, match="^Length"):