def test_variable_init(self):
a = pybamm.IndependentVariable("a")
self.assertEqual(a.name, "a")
self.assertEqual(a.domain, [])
a = pybamm.IndependentVariable("a", domain=["test"])
self.assertEqual(a.domain[0], "test")
a = pybamm.IndependentVariable("a", domain="test")
self.assertEqual(a.domain[0], "test")
with self.assertRaises(TypeError):
pybamm.IndependentVariable("a", domain=1)
def test_jac_of_independent_variable(self):
a = pybamm.IndependentVariable("Variable")
y = pybamm.StateVector(slice(0, 1))
self.assertEqual(a.jac(y).evaluate(), 0)