def test_coefficients(self):
exp = AffVstack(self.x)
coeffs = exp.coefficients(self.intf)
self.assertEqual(coeffs.keys(), self.x.coefficients(self.intf).keys())
exp = AffVstack(self.x, self.y)
coeffs = exp.coefficients(self.intf)
self.assertItemsEqual(coeffs.keys(),
self.x.coefficients(self.intf).keys() + \
self.y.coefficients(self.intf).keys())
for k,v in coeffs.items():
self.assertEqual(intf.size(v), (4,2))
exp = AffVstack(self.A, self.B, self.C)
coeffs = exp.coefficients(self.intf)
v = coeffs[self.A]
self.assertEqual(intf.size(v), (10,3))
def test_variables(self):
exp = AffVstack(self.x, self.y, self.x+self.y)
self.assertItemsEqual(exp.variables(), [self.x, self.y, self.x, self.y])
exp = AffVstack(self.A, self.B, self.C)
self.assertItemsEqual(exp.variables(), [self.A, self.B])
