def test_qasm():
assert cirq.qasm(NoMethod(), default=None) is None
assert cirq.qasm(NoMethod(), default=5) == 5
assert cirq.qasm(ReturnsText()) == 'text'
with pytest.raises(TypeError, match='no _qasm_ method'):
_ = cirq.qasm(NoMethod())
with pytest.raises(TypeError, match='returned NotImplemented or None'):
_ = cirq.qasm(ReturnsNotImplemented())
assert cirq.qasm(ExpectsArgs(), args=cirq.QasmArgs()) == 'text'
assert cirq.qasm(ExpectsArgsQubits(), args=cirq.QasmArgs(),
qubits=()) == 'text'
def test_qasm_output_args_format():
a = cirq.NamedQubit('a')
b = cirq.NamedQubit('b')
m_a = cirq.measure(a, key='meas_a')
m_b = cirq.measure(b, key='meas_b')
args = cirq.QasmArgs(precision=4,
version='2.0',
qubit_id_map={
a: 'aaa[0]',
b: 'bbb[0]'
},
meas_key_id_map={
'meas_a': 'm_a',
'meas_b': 'm_b'
})
assert args.format('_{0}_', a) == '_aaa[0]_'
assert args.format('_{0}_', b) == '_bbb[0]_'
assert args.format('_{0:meas}_', cirq.measurement_key(m_a)) == '_m_a_'
assert args.format('_{0:meas}_', cirq.measurement_key(m_b)) == '_m_b_'
assert args.format('_{0}_', 89.1234567) == '_89.1235_'
assert args.format('_{0}_', 1.23) == '_1.23_'
assert args.format('_{0:half_turns}_', 89.1234567) == '_pi*89.1235_'
assert args.format('_{0:half_turns}_', 1.23) == '_pi*1.23_'
assert args.format('_{0}_', 'other') == '_other_'
def test_confused_measure_qasm():
q0 = cirq.LineQubit(0)
assert (cirq.qasm(
cirq.measure(q0,
key='a',
confusion_map={(0, ): np.array([[0, 1], [1, 0]])}),
args=cirq.QasmArgs(),
default='not implemented',
) == 'not implemented')
def test_qudit_measure_qasm():
assert (
cirq.qasm(
cirq.measure(cirq.LineQid(0, 3), key='a'),
args=cirq.QasmArgs(),
default='not implemented',
)
== 'not implemented'
)
def test_no_symbolic_qasm_but_fails_gracefully():
q = cirq.NamedQubit('q')
v = cirq.PhasedXPowGate(phase_exponent=sympy.Symbol('p')).on(q)
assert cirq.qasm(v, args=cirq.QasmArgs(), default=None) is None
def test_tagged_operation_forwards_protocols():
"""The results of all protocols applied to an operation with a tag should
be equivalent to the result without tags.
"""
q1 = cirq.GridQubit(1, 1)
q2 = cirq.GridQubit(1, 2)
h = cirq.H(q1)
tag = 'tag1'
tagged_h = cirq.H(q1).with_tags(tag)
np.testing.assert_equal(cirq.unitary(tagged_h), cirq.unitary(h))
assert cirq.has_unitary(tagged_h)
assert cirq.decompose(tagged_h) == cirq.decompose(h)
assert cirq.pauli_expansion(tagged_h) == cirq.pauli_expansion(h)
assert cirq.equal_up_to_global_phase(h, tagged_h)
assert np.isclose(cirq.channel(h), cirq.channel(tagged_h)).all()
assert cirq.measurement_key(cirq.measure(q1, key='blah').with_tags(tag)) == 'blah'
parameterized_op = cirq.XPowGate(exponent=sympy.Symbol('t'))(q1).with_tags(tag)
assert cirq.is_parameterized(parameterized_op)
resolver = cirq.study.ParamResolver({'t': 0.25})
assert cirq.resolve_parameters(parameterized_op, resolver) == cirq.XPowGate(exponent=0.25)(
q1
).with_tags(tag)
assert cirq.resolve_parameters_once(parameterized_op, resolver) == cirq.XPowGate(exponent=0.25)(
q1
).with_tags(tag)
y = cirq.Y(q1)
tagged_y = cirq.Y(q1).with_tags(tag)
assert tagged_y ** 0.5 == cirq.YPowGate(exponent=0.5)(q1)
assert tagged_y * 2 == (y * 2)
assert 3 * tagged_y == (3 * y)
assert cirq.phase_by(y, 0.125, 0) == cirq.phase_by(tagged_y, 0.125, 0)
controlled_y = tagged_y.controlled_by(q2)
assert controlled_y.qubits == (
q2,
q1,
)
assert isinstance(controlled_y, cirq.Operation)
assert not isinstance(controlled_y, cirq.TaggedOperation)
clifford_x = cirq.SingleQubitCliffordGate.X(q1)
tagged_x = cirq.SingleQubitCliffordGate.X(q1).with_tags(tag)
assert cirq.commutes(clifford_x, clifford_x)
assert cirq.commutes(tagged_x, clifford_x)
assert cirq.commutes(clifford_x, tagged_x)
assert cirq.commutes(tagged_x, tagged_x)
assert cirq.trace_distance_bound(y ** 0.001) == cirq.trace_distance_bound(
(y ** 0.001).with_tags(tag)
)
flip = cirq.bit_flip(0.5)(q1)
tagged_flip = cirq.bit_flip(0.5)(q1).with_tags(tag)
assert cirq.has_mixture(tagged_flip)
assert cirq.has_channel(tagged_flip)
flip_mixture = cirq.mixture(flip)
tagged_mixture = cirq.mixture(tagged_flip)
assert len(tagged_mixture) == 2
assert len(tagged_mixture[0]) == 2
assert len(tagged_mixture[1]) == 2
assert tagged_mixture[0][0] == flip_mixture[0][0]
assert np.isclose(tagged_mixture[0][1], flip_mixture[0][1]).all()
assert tagged_mixture[1][0] == flip_mixture[1][0]
assert np.isclose(tagged_mixture[1][1], flip_mixture[1][1]).all()
qubit_map = {q1: 'q1'}
qasm_args = cirq.QasmArgs(qubit_id_map=qubit_map)
assert cirq.qasm(h, args=qasm_args) == cirq.qasm(tagged_h, args=qasm_args)
cirq.testing.assert_has_consistent_apply_unitary(tagged_h)
def test_qasm_output_args_validate():
args = cirq.QasmArgs(version='2.0')
args.validate_version('2.0')
with pytest.raises(ValueError):
args.validate_version('2.1')
