def test_snapshot_expval_matrix_post_measure(self):
"""Test snapshot expectation value (matrix) after final measurement"""
shots = 1000
labels = snapshot_expval_labels()
counts_targets = snapshot_expval_counts(shots)
value_targets = snapshot_expval_post_meas_values()
circuits = snapshot_expval_circuits(pauli=False, post_measure=True)
qobj = assemble(circuits, self.SIMULATOR, shots=shots)
job = self.SIMULATOR.run(qobj, backend_options=self.BACKEND_OPTS)
result = job.result()
success = getattr(result, 'success', False)
method = self.BACKEND_OPTS.get('method', 'automatic')
if method not in QasmSnapshotExpValMatrixTests.SUPPORTED_QASM_METHODS:
self.assertFalse(success)
else:
self.assertTrue(success)
self.compare_counts(result,
circuits,
counts_targets,
delta=0.1 * shots)
# Check snapshots
for j, circuit in enumerate(circuits):
data = result.data(circuit)
all_snapshots = self.expval_snapshots(data, labels)
for label in labels:
snaps = all_snapshots.get(label, {})
self.assertTrue(len(snaps), 1)
for memory, value in snaps.items():
target = value_targets[j].get(label,
{}).get(memory, {})
self.assertAlmostEqual(value, target, delta=1e-7)
def test_parameterized_qobj_qasm_snapshot_expval(self):
"""Test parameterized qobj with Expectation Value snapshot and qasm simulator."""
shots = 1000
labels = snapshot_expval_labels() * 3
counts_targets = snapshot_expval_counts(shots) * 3
value_targets = snapshot_expval_pre_meas_values() * 3
backend = QasmSimulator()
qobj = self.parameterized_qobj(backend=backend,
shots=1000,
measure=True,
snapshot=True)
self.assertIn('parameterizations', qobj.to_dict()['config'])
job = backend.run(qobj, self.BACKEND_OPTS)
result = job.result()
success = getattr(result, 'success', False)
num_circs = len(result.to_dict()['results'])
self.assertTrue(success)
self.compare_counts(result,
range(num_circs),
counts_targets,
delta=0.1 * shots)
# Check snapshots
for j in range(num_circs):
data = result.data(j)
all_snapshots = self.expval_snapshots(data, labels)
for label in labels:
snaps = all_snapshots.get(label, {})
self.assertTrue(len(snaps), 1)
for memory, value in snaps.items():
target = value_targets[j].get(label, {}).get(memory, {})
self.assertAlmostEqual(value, target, delta=1e-7)
