Raise TypeError for types that can't be compared to arrays.

Author: kalekundert

_pytest/python_api.py

@@ -66,7 +66,7 @@ def __eq__(self, actual):
         try:
             actual = np.asarray(actual)
         except:
-            raise ValueError("cannot compare '{0}' to numpy.ndarray".format(actual))
+            raise TypeError("cannot compare '{0}' to numpy.ndarray".format(actual))
 
         if actual.shape != self.expected.shape:
             return False