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Removing QubitStateVector (deprecated) from test_apply.py #586

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merged 2 commits into from
Sep 20, 2024
Merged

Removing QubitStateVector (deprecated) from test_apply.py #586

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abc5729
Removes `QubitStateVector` from tests
PietropaoloFrisoni Sep 20, 2024
cfa8d74
Making pylint happy (hopefully)
PietropaoloFrisoni Sep 20, 2024
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22 changes: 10 additions & 12 deletions tests/test_apply.py
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Original file line number Diff line number Diff line change
Expand Up @@ -109,14 +109,13 @@
class TestAnalyticApply:
"""Test application of PennyLane operations with analytic calculation."""

@pytest.mark.parametrize("op", [qml.QubitStateVector, qml.StatePrep])
def test_qubit_state_vector(self, op, init_state, device, tol):
"""Test that the QubitStateVector and StatePrep operations produce the expected
results with the apply method."""
def test_qubit_state_vector(self, init_state, device, tol):
"""Test that the StatePrep operation produces the expected
result with the apply method."""
dev = device(1)
state = init_state(1)

dev.apply([op(state, wires=[0])])
dev.apply([qml.StatePrep(state, wires=[0])])

res = np.abs(dev.state) ** 2
expected = np.abs(state) ** 2
Expand Down Expand Up @@ -222,31 +221,30 @@ def test_invalid_qubit(self, init_state, device):
class TestNonAnalyticApply:
"""Test application of PennyLane operations with non-analytic calculation."""

@pytest.mark.parametrize("op", [qml.QubitStateVector, qml.StatePrep])
def test_qubit_state_vector(self, op, init_state, device, tol):
"""Test that the QubitStateVector and StatePrep operations produces the expected
def test_qubit_state_vector(self, init_state, device, tol):
"""Test that the StatePrep operation produces the expected
result with the apply method."""

dev = device(1)
state = init_state(1)
wires = [0]

dev.apply([op(state, wires=wires)])
dev.apply([qml.StatePrep(state, wires=wires)])
dev._samples = dev.generate_samples()

res = np.fromiter(dev.probability(), dtype=np.float64)
expected = np.abs(state) ** 2
assert np.allclose(res, expected, **tol)

@pytest.mark.parametrize("op", [qml.QubitStateVector, qml.StatePrep])
def test_invalid_qubit_state_vector(self, op, device):
def test_invalid_qubit_state_vector(self, device):
"""Test that an exception is raised if the state
vector is the wrong size"""
dev = device(2)
state = np.array([0, 123.432])
wires = [0, 1]

with pytest.raises(ValueError, match=r"State must be of length 4"):
dev.apply([op(state, wires=wires)])
dev.apply([qml.StatePrep(state, wires=wires)])

@pytest.mark.parametrize("mat", [U, U2])
def test_qubit_unitary(self, init_state, device, mat, tol):
Expand Down
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