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qubit_manager_test.py
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qubit_manager_test.py
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# Copyright 2023 The Cirq Developers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import cirq
from cirq.ops import qubit_manager as cqi
import pytest
def test_clean_qubits():
q = cqi.CleanQubit(1)
assert q.id == 1
assert q.dimension == 2
assert str(q) == '_c(1)'
assert repr(q) == 'cirq.ops.CleanQubit(1)'
q = cqi.CleanQubit(2, dim=3)
assert q.id == 2
assert q.dimension == 3
assert str(q) == '_c(2) (d=3)'
assert repr(q) == 'cirq.ops.CleanQubit(2, dim=3)'
assert cqi.CleanQubit(1) < cqi.CleanQubit(2)
def test_borrow_qubits():
q = cqi.BorrowableQubit(10)
assert q.id == 10
assert q.dimension == 2
assert str(q) == '_b(10)'
assert repr(q) == 'cirq.ops.BorrowableQubit(10)'
q = cqi.BorrowableQubit(20, dim=4)
assert q.id == 20
assert q.dimension == 4
assert str(q) == '_b(20) (d=4)'
assert repr(q) == 'cirq.ops.BorrowableQubit(20, dim=4)'
assert cqi.BorrowableQubit(1) < cqi.BorrowableQubit(2)
@pytest.mark.parametrize('_', range(2))
def test_simple_qubit_manager(_):
qm = cirq.ops.SimpleQubitManager()
assert qm.qalloc(1) == [cqi.CleanQubit(0)]
assert qm.qalloc(2) == [cqi.CleanQubit(1), cqi.CleanQubit(2)]
assert qm.qalloc(1, dim=3) == [cqi.CleanQubit(3, dim=3)]
assert qm.qborrow(1) == [cqi.BorrowableQubit(0)]
assert qm.qborrow(2) == [cqi.BorrowableQubit(1), cqi.BorrowableQubit(2)]
assert qm.qborrow(1, dim=3) == [cqi.BorrowableQubit(3, dim=3)]
qm.qfree([cqi.CleanQubit(i) for i in range(3)] + [cqi.CleanQubit(3, dim=3)])
qm.qfree([cqi.BorrowableQubit(i) for i in range(3)] + [cqi.BorrowableQubit(3, dim=3)])
with pytest.raises(ValueError, match="not allocated"):
qm.qfree([cqi.CleanQubit(10)])
with pytest.raises(ValueError, match="not allocated"):
qm.qfree([cqi.BorrowableQubit(10)])