def test_homogeneous_parts_A(self):
one = self.poly_ring.one()
zero = self.poly_ring.zero()
gm = GradedModule([[one,one]],[0,1],[1,2,3])
parts = gm.get_homogeneous_parts([one,one])
parts_true = { 0:[one,zero] , 1:[zero,one] }
self.assertEqual(parts,parts_true)
def test_homogeneous_parts_B(self):
x = self.x
y = self.y
z = self.z
one = self.poly_ring.one()
zero = self.poly_ring.zero()
gm = GradedModule([[one,one]],[0,1],[1,2,3])
parts = gm.get_homogeneous_parts([x*y,x**3+z*y])
self.assertEqual(parts,{3:[x*y,zero],4:[zero,x**3],6:[zero,z*y]})
