def test_delays_tdmprogram_with_several_spatial_modes(self):
"""Test that error is raised when calculating the delays of a TDM program with more than
one spatial mode"""
prog = TDMProgram(N=[1, 2])
with prog.context([0, np.pi / 2], [0, np.pi / 2]) as (p, q):
ops.Sgate(4) | q[0]
ops.Sgate(4) | q[2]
ops.MeasureHomodyne(p[0]) | q[0]
ops.MeasureHomodyne(p[1]) | q[1]
with pytest.raises(
NotImplementedError,
match="Calculating delays for programs with more than one spatial mode is not implemented.",
):
prog.get_delays()
def test_delays_tdmprogram_with_nested_loops(self):
"""Test that error is raised when calculating the delays of a TDM program with nested loops"""
gate_args = [random_bs(8), random_bs(8)]
# a program with nested delays
prog = TDMProgram(N=4)
with prog.context(*gate_args) as (p, q):
ops.Sgate(0.4, 0) | q[3]
ops.BSgate(p[0]) | (q[0], q[3])
ops.BSgate(p[1]) | (q[2], q[1])
ops.MeasureX | q[0]
with pytest.raises(
NotImplementedError,
match="Calculating delays for programs with nested loops is not implemented.",
):
prog.get_delays()