def test_abstract_state_init():
AbstractState.__abstractmethods__ = set()
state = AbstractState(5) # pylint: disable=E0110
assert state.nqubits == 5
assert len(state) == 32
state = AbstractState() # pylint: disable=E0110
with pytest.raises(AttributeError):
nqubits = state.nqubits
with pytest.raises(AttributeError):
nstates = len(state)
def test_abstract_state_tensor_getter_setter(nqubits):
AbstractState.__abstractmethods__ = set()
state = AbstractState(nqubits) # pylint: disable=E0110
with pytest.raises(AttributeError):
tensor = state.tensor
state.tensor = [0, 0, 0, 0]
assert state.tensor == [0, 0, 0, 0]
assert state.nqubits == 2
with pytest.raises(ValueError):
state.tensor = [0, 0]
def test_abstract_state_getitem():
AbstractState.__abstractmethods__ = set()
state = AbstractState.from_tensor([0, 1, 0, 1]) # pylint: disable=E0110
assert state[1] == 1
assert state[2] == 0
with pytest.raises(IndexError):
state[5]
def test_abstract_state_copy():
AbstractState.__abstractmethods__ = set()
state = AbstractState.from_tensor([0, 1])
cstate = state.copy()
assert cstate.nqubits == state.nqubits
assert len(cstate) == len(state)
assert cstate.tensor == state.tensor
assert cstate.measurements == state.measurements
def test_abstract_state_from_tensor():
AbstractState.__abstractmethods__ = set()
state = AbstractState.from_tensor([0, 1]) # pylint: disable=E0110
assert state.nqubits == 1
assert state.tensor == [0, 1]