TEST: Check invalid caching argument for get_fdata

Author: effigies

nibabel/tests/test_image_api.py

@@ -339,9 +339,10 @@ def validate_data_interface(self, imaker, params):
                     # cache state.
                     img.uncache()
                     assert_true(img.in_memory)
-                # Values to get_data caching parameter must be 'fill' or
+                # Values to get_(f)data caching parameter must be 'fill' or
                 # 'unchanged'
                 assert_raises(ValueError, img.get_data, caching='something')
+                assert_raises(ValueError, img.get_fdata, caching='something')
             # Data shape is same as image shape
             assert_equal(img.shape, method().shape)
             # Values to get_data caching parameter must be 'fill' or