def test_undefined_register_from_qubit_arg():
qasm = """OPENQASM 2.0;
qreg q[2];
CX q[0], q2[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Undefined.*register.*q2.*"""):
parser.parse(qasm)
def test_syntax_error():
qasm = """OPENQASM 2.0;
qreg q[2] bla;
foobar q[0];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Syntax error: 'bla'.*"""):
parser.parse(qasm)
def test_unexpected_end_of_file():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
creg
"""
parser = QasmParser()
with pytest.raises(QasmException, match="Unexpected end of file"):
parser.parse(qasm)
def test_qelib_gate_without_include_statement():
qasm = """OPENQASM 2.0;
qreg q[2];
x q[0];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Unknown gate "x".* line 3.*forget.*\?"""):
parser.parse(qasm)
def test_CX_gate_not_enough_args():
qasm = """OPENQASM 2.0;
qreg q[2];
CX q[0];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"CX.*takes.*got.*1.*line 3"):
parser.parse(qasm)
def test_unknown_function():
qasm = """OPENQASM 2.0;
qreg q[1];
U(nonexistent(3), 2 * pi, pi / 3.0) q[0];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r".*not recognized.*'nonexistent'.*line 3"):
parser.parse(qasm)
def test_U_gate_too_much_params_error():
qasm = """OPENQASM 2.0;
qreg q[2];
U(pi, pi, pi, pi) q[1];"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"U takes 3.*got.*4.*line 3"):
parser.parse(qasm)
def test_CX_gate_mismatched_registers():
qasm = """OPENQASM 2.0;
qreg q1[2];
qreg q2[3];
CX q1, q2;
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"Non matching.*length \[2 3\].*line 4"):
parser.parse(qasm)
def test_u_gate_zero_params_error():
qasm = """OPENQASM 2.0;
qreg q[2];
U() q[1];"""
parser = QasmParser()
with pytest.raises(QasmException,
match=r"U takes 3 parameter\(s\).*got.*0.*line 3"):
parser.parse(qasm)
def test_measurement_bounds():
qasm = """OPENQASM 2.0;
qreg q1[3];
creg c1[3];
measure q1[0] -> c1[4];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"Out of bounds bit.*4.*c1.*size 3.*line 4"):
parser.parse(qasm)
def test_CX_gate_arg_overlap():
qasm = """OPENQASM 2.0;
qreg q1[2];
qreg q2[3];
CX q1[1], q1[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"Overlapping.*at line 4"):
parser.parse(qasm)
def test_CX_gate_bounds():
qasm = """OPENQASM 2.0;
qreg q1[2];
qreg q2[3];
CX q1[4], q2[0];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"Out of bounds.*4.*q1.*2.*line 4"):
parser.parse(qasm)
def test_three_qubit_gates_with_too_much_parameters(qasm_gate: str):
qasm = f"""OPENQASM 2.0;
include "qelib1.inc";
qreg q[3];
{qasm_gate}(pi) q[0],q[1],q[2];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r""".*{}.*parameter.*line 4.*""".format(qasm_gate)):
parser.parse(qasm)
def test_rotation_gates_zero_params_error(qasm_gate: str):
qasm = f"""OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
{qasm_gate} q[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r".*{}.* takes 1.*got.*0.*line 4".format(qasm_gate)):
parser.parse(qasm)
def test_format_header_with_quelibinc_circuit():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
"""
parser = QasmParser()
parsed_qasm = parser.parse(qasm)
assert parsed_qasm.supportedFormat is True
assert parsed_qasm.qelib1Include is True
ct.assert_same_circuits(parsed_qasm.circuit, Circuit())
def test_U_angles():
qasm = """
OPENQASM 2.0;
qreg q[1];
U(pi/2,0,pi) q[0];
"""
c = QasmParser().parse(qasm).circuit
cirq.testing.assert_allclose_up_to_global_phase(cirq.unitary(c),
cirq.unitary(cirq.H),
atol=1e-7)
def circuit_from_qasm(qasm: str) -> circuits.Circuit:
"""Parses an OpenQASM string to `cirq.Circuit`.
Args:
qasm: The OpenQASM string
Returns:
The parsed circuit
"""
return QasmParser().parse(qasm).circuit
def test_unknown_basic_gate():
qasm = """OPENQASM 2.0;
qreg q[2];
foobar q[0];
"""
parser = QasmParser()
with pytest.raises(
QasmException,
match=r"""Unknown gate "foobar".* line 3.*forgot.*\?"""):
parser.parse(qasm)
def test_standard_single_qubit_gates_wrong_number_of_args(qasm_gate):
qasm = f"""
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
{qasm_gate} q[0], q[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r".* takes 1.*got.*2.*line 5"):
parser.parse(qasm)
def test_rotation_gates_wrong_number_of_args(qasm_gate: str):
qasm = f"""
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
{qasm_gate}(pi) q[0], q[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r".*{}.* takes 1.*got.*2.*line 5".format(qasm_gate)):
parser.parse(qasm)
def test_measure_mismatched_register_size():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg q1[2];
creg c1[3];
measure q1 -> c1;
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r""".*mismatched .* 2 -> 3.*line 5"""):
parser.parse(qasm)
def test_measure_undefined_classical_bit():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg q1[3];
creg c1[3];
measure q1[1] -> c2[1];
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Undefined classical register.*c2.*line 5"""):
parser.parse(qasm)
def test_measurement_bounds():
qasm = """OPENQASM 2.0;
qreg q1[3];
creg c1[3];
measure q1[0] -> c1[4];
"""
parser = QasmParser()
with pytest.raises(QasmException,
match=r"Out of bounds bit index 4"
r" on classical register c1 of size 3 at line 4"):
parser.parse(qasm)
def test_cx_gate_bounds():
qasm = """OPENQASM 2.0;
qreg q1[2];
qreg q2[3];
CX q1[4], q2[0];
"""
parser = QasmParser()
with pytest.raises(QasmException,
match=r"Out of bounds qubit index 4"
r" on register q1 of size 2 at line 4"):
parser.parse(qasm)
def test_CX_gate_not_enough_args():
qasm = """OPENQASM 2.0;
qreg q[2];
CX q[0];
"""
parser = QasmParser()
with pytest.raises(QasmException,
match=(r"CX only takes 2 arg\(s\) "
r"\(qubits and/or registers\)"
r", got: 1, at line 3")):
parser.parse(qasm)
def test_measure_to_quantum_register():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg q1[3];
qreg q2[3];
creg c1[3];
measure q2 -> q1;
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Undefined classical register.*q1.*line 6"""):
parser.parse(qasm)
def test_measure_from_classical_register():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg q1[2];
creg c1[3];
creg c2[3];
measure c1 -> c2;
"""
parser = QasmParser()
with pytest.raises(QasmException, match=r"""Undefined quantum register.*c1.*line 6"""):
parser.parse(qasm)
def test_three_qubit_gates_not_enough_args(qasm_gate: str):
qasm = f"""OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
{qasm_gate} q[0];
"""
parser = QasmParser()
with pytest.raises(
QasmException, match=r""".*{}.* takes 3 arg\(s\).*got.*1.*line 4""".format(qasm_gate)
):
parser.parse(qasm)
def test_rotation_gates_too_many_params_error(qasm_gate: str):
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
{}(pi, 2*pi) q[1];
""".format(qasm_gate)
parser = QasmParser()
with pytest.raises(
QasmException,
match=r".*{}.* takes 1.*got.*2.*line 4".format(qasm_gate)):
parser.parse(qasm)
def test_multiple_qreg_declaration():
qasm = """OPENQASM 2.0;
include "qelib1.inc";
qreg a_quantum_register [ 1337 ];
qreg q[42];
"""
parser = QasmParser()
parsed_qasm = parser.parse(qasm)
assert parsed_qasm.supportedFormat
assert parsed_qasm.qelib1Include
ct.assert_same_circuits(parsed_qasm.circuit, Circuit())
assert parsed_qasm.qregs == {'a_quantum_register': 1337, 'q': 42}