def test_tensor_product_of_valid_terms(self):
"""Tests if return is true for a tensor product of Pauli, Hadamard, and Projector terms"""
o = qml.PauliZ(0) @ qml.Hadamard(1) @ qml.Projector([0], wires=2)
assert _obs_has_kernel(o)
def test_tensor_product_of_mixed_terms(self):
"""Tests if return is false for a tensor product of valid and invalid terms"""
o = qml.PauliZ(0) @ qml.Hermitian(np.eye(2), wires=1)
assert not _obs_has_kernel(o)
def test_hermitian(self):
"""Tests if return is false for a Hermitian observable"""
o = qml.Hermitian(np.eye(2), wires=0)
assert not _obs_has_kernel(o)
def test_projector(self):
"""Tests if return is true for a Projector observable"""
o = qml.Projector([0], wires=0)
assert _obs_has_kernel(o)
def test_hadamard(self):
"""Tests if return is true for a Hadamard observable"""
o = qml.Hadamard(0)
assert _obs_has_kernel(o)
def test_tensor_pauli(self):
"""Tests if return is true for a tensor product of Pauli terms"""
o = qml.PauliZ(0) @ qml.PauliZ(1)
assert _obs_has_kernel(o)
def test_pauli_z(self):
"""Tests if return is true for a PauliZ observable"""
o = qml.PauliZ(0)
assert _obs_has_kernel(o)