def test_init_NumericValue(self):
v = variable()
p = parameter()
e = expression()
d = data_expression()
o = objective()
for obj in (v, v + 1, v**2, p, p + 1, p**2, e, e + 1, e**2, d, d + 1,
d**2, o, o + 1, o**2):
self.assertTrue(isinstance(noclone(obj), NumericValue))
self.assertTrue(isinstance(noclone(obj), IIdentityExpression))
self.assertTrue(isinstance(noclone(obj), noclone))
self.assertIs(noclone(obj).expr, obj)
def testis_potentially_variable(self):
e = noclone(variable())
self.assertEqual(e.is_potentially_variable(), True)
self.assertEqual(potentially_variable(e), True)
e = noclone(parameter())
self.assertEqual(e.is_potentially_variable(), False)
self.assertEqual(potentially_variable(e), False)
e = noclone(expression())
self.assertEqual(e.is_potentially_variable(), True)
self.assertEqual(potentially_variable(e), True)
e = noclone(data_expression())
self.assertEqual(e.is_potentially_variable(), False)
self.assertEqual(potentially_variable(e), False)
def test_bad_weights(self):
v = variable()
with self.assertRaises(ValueError):
s = sos([v], weights=[v])
v.fix(1.0)
with self.assertRaises(ValueError):
s = sos([v], weights=[v])
e = expression()
with self.assertRaises(ValueError):
s = sos([v], weights=[e])
de = data_expression()
s = sos([v], weights=[de])
p = parameter()
s = sos([v], weights=[p])
def test_ctype(self):
e = data_expression()
self.assertIs(e.ctype, Expression)
self.assertIs(type(e).ctype, Expression)
self.assertIs(data_expression.ctype, Expression)
def test_is_expression_type(self):
for obj in (variable(), parameter(), objective(), expression(),
data_expression()):
self.assertEqual(noclone(obj).is_expression_type(), True)
