#858 add coverage

Author: martinjrobins

tests/unit/test_expression_tree/test_operations/test_jac.py

@@ -107,11 +107,14 @@ def test_nonlinear(self):
 
     def test_multislice_raises(self):
         y1 = pybamm.StateVector(slice(0, 4), slice(7, 8))
+        y_dot1 = pybamm.StateVectorDot(slice(0, 4), slice(7, 8))
         y2 = pybamm.StateVector(slice(4, 7))
         with self.assertRaises(NotImplementedError):
             y1.jac(y1)
         with self.assertRaises(NotImplementedError):
             y2.jac(y1)
+        with self.assertRaises(NotImplementedError):
+            y_dot1.jac(y1)
 
     def test_linear_ydot(self):
         y = pybamm.StateVector(slice(0, 4))