def test_permission_difference():
p1 = Permission(('a', 'b'), ('a', 'c'))
p2 = Permission(('a', 'c'), ('d', 'e'))
p3 = p1.difference(p2)
assert p3.needs == set([('a', 'b')])
p4 = p2.difference(p1)
assert p4.needs == set([('d', 'e')])
def test_permission_difference():
p1 = Permission(('a', 'b'), ('a', 'c'))
p2 = Permission(('a', 'c'), ('d', 'e'))
p3 = p1.difference(p2)
assert p3.needs == set([('a', 'b')])
p4 = p2.difference(p1)
assert p4.needs == set([('d', 'e')])
def test_permission_or():
p1 = Permission(RoleNeed('boss'), RoleNeed('lackey'))
p2 = Permission(RoleNeed('lackey'), RoleNeed('underling'))
p3 = p1 | p2
p4 = p1.difference(p2)
assert p3.needs == p4.needs
def test_permission_or():
p1 = Permission(RoleNeed('boss'), RoleNeed('lackey'))
p2 = Permission(RoleNeed('lackey'), RoleNeed('underling'))
p3 = p1 | p2
p4 = p1.difference(p2)
assert p3.needs == p4.needs
