def test_recursion_block(self):
"""Test blocked on layer 1 gives placement on layer 2"""
out = _recursive_find_layer(layer_to_check=3,
op_occupied_wires={0},
occupied_wires_per_layer=[{1}, {0}, {1},
{1}])
assert out == 2
def test_blocked_layer(self):
"""Test operation moved to higher layer if blocked on 0th layer."""
out = _recursive_find_layer(layer_to_check=0,
op_occupied_wires={0},
occupied_wires_per_layer=[{0}])
assert out == 1
def test_recursion_no_block(self):
"""Test recursion to zero if start in higher layer and not blocked"""
out = _recursive_find_layer(layer_to_check=2,
op_occupied_wires={0},
occupied_wires_per_layer=[{1}, {1}, {1}])
assert out == 0
def test_first_layer(self):
"""Test operation remains in 0th layer if not blocked"""
out = _recursive_find_layer(layer_to_check=0,
op_occupied_wires={0},
occupied_wires_per_layer=[{1}])
assert out == 0
