def test_linked_triple_linked():
'''
Link to a linked variable that links to a linked variable, all use indices
'''
G1 = NeuronGroup(2, 'a : 1')
G2 = NeuronGroup(4, 'b : 1 (linked)')
G2.b = linked_var(G1.a, index=np.arange(2).repeat(2))
G3 = NeuronGroup(4, 'c: 1 (linked)')
G3.c = linked_var(G2.b, index=np.arange(4)[::-1])
G4 = NeuronGroup(8, 'd: 1 (linked)')
G4.d = linked_var(G3.c, index=np.arange(4).repeat(2))
G1.a = np.arange(2)*0.1
assert_equal(G4.d[:], np.arange(2).repeat(2)[::-1].repeat(2)*0.1)
