def test_convert_array_symbols(self):
# Arrays
a = np.array([1, 2, 3, 4, 5])
pybamm_a = pybamm.Array(a)
self.assert_casadi_equal(pybamm_a.to_casadi(), casadi.MX(a))
casadi_t = casadi.MX.sym("t")
casadi_y = casadi.MX.sym("y", 10)
casadi_y_dot = casadi.MX.sym("y_dot", 10)
pybamm_t = pybamm.Time()
pybamm_y = pybamm.StateVector(slice(0, 10))
pybamm_y_dot = pybamm.StateVectorDot(slice(0, 10))
# Time
self.assertEqual(pybamm_t.to_casadi(casadi_t, casadi_y), casadi_t)
# State Vector
self.assert_casadi_equal(pybamm_y.to_casadi(casadi_t, casadi_y),
casadi_y)
# State Vector Dot
self.assert_casadi_equal(
pybamm_y_dot.to_casadi(casadi_t, casadi_y, casadi_y_dot),
casadi_y_dot)
def test_symbol_evaluates_to_number(self):
a = pybamm.Scalar(3)
self.assertTrue(a.evaluates_to_number())
a = pybamm.Parameter("a")
self.assertFalse(a.evaluates_to_number())
a = pybamm.Scalar(3) * pybamm.Time()
self.assertTrue(a.evaluates_to_number())
# highlight difference between this function and isinstance(a, Scalar)
self.assertNotIsInstance(a, pybamm.Scalar)
a = pybamm.Variable("a")
self.assertFalse(a.evaluates_to_number())
a = pybamm.Scalar(3) - 2
self.assertTrue(a.evaluates_to_number())
a = pybamm.Vector(np.ones(5))
self.assertFalse(a.evaluates_to_number())
a = pybamm.Matrix(np.ones((4, 6)))
self.assertFalse(a.evaluates_to_number())
a = pybamm.StateVector(slice(0, 10))
self.assertFalse(a.evaluates_to_number())
# Time variable returns true
a = 3 * pybamm.t + 2
self.assertTrue(a.evaluates_to_number())
def test_time(self):
t = pybamm.Time()
self.assertEqual(t.name, "time")
self.assertEqual(t.evaluate(4), 4)
with self.assertRaises(ValueError):
t.evaluate(None)
t = pybamm.t
self.assertEqual(t.name, "time")
self.assertEqual(t.evaluate(4), 4)
with self.assertRaises(ValueError):
t.evaluate(None)
def test_convert_array_symbols(self):
# Arrays
a = np.array([1, 2, 3, 4, 5])
pybamm_a = pybamm.Array(a)
self.assertTrue(casadi.is_equal(pybamm_a.to_casadi(), casadi.SX(a)))
casadi_t = casadi.SX.sym("t")
casadi_y = casadi.SX.sym("y", 10)
pybamm_t = pybamm.Time()
pybamm_y = pybamm.StateVector(slice(0, 10))
# Time
self.assertEqual(pybamm_t.to_casadi(casadi_t, casadi_y), casadi_t)
# State Vector
self.assertTrue(
casadi.is_equal(pybamm_y.to_casadi(casadi_t, casadi_y), casadi_y))
# outer product
outer = pybamm.Outer(pybamm_a, pybamm_a)
self.assertTrue(
casadi.is_equal(outer.to_casadi(), casadi.SX(outer.evaluate())))
