mirror of https://github.com/Qiskit/qiskit.git
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
# This code is part of Qiskit.
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#
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# (C) Copyright IBM 2017, 2019.
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#
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# This code is licensed under the Apache License, Version 2.0. You may
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# obtain a copy of this license in the LICENSE.txt file in the root directory
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# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
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#
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# Any modifications or derivative works of this code must retain this
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# copyright notice, and modified files need to carry a notice indicating
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# that they have been altered from the originals.
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"""Depth pass testing"""
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import unittest
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from qiskit import QuantumCircuit, QuantumRegister
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from qiskit.converters import circuit_to_dag
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from qiskit.transpiler.passes import CountOps
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from test import QiskitTestCase # pylint: disable=wrong-import-order
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class TestCountOpsPass(QiskitTestCase):
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"""Tests for CountOps analysis methods."""
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def test_empty_dag(self):
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"""Empty DAG has empty counts."""
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circuit = QuantumCircuit()
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dag = circuit_to_dag(circuit)
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pass_ = CountOps()
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_ = pass_.run(dag)
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self.assertDictEqual(pass_.property_set["count_ops"], {})
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def test_just_qubits(self):
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"""A dag with 8 operations (6 CXs and 2 Hs)"""
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# ┌───┐ ┌───┐┌───┐
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# q0_0: ┤ H ├──■────■────■────■──┤ X ├┤ X ├
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# ├───┤┌─┴─┐┌─┴─┐┌─┴─┐┌─┴─┐└─┬─┘└─┬─┘
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# q0_1: ┤ H ├┤ X ├┤ X ├┤ X ├┤ X ├──■────■──
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# └───┘└───┘└───┘└───┘└───┘
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qr = QuantumRegister(2)
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circuit = QuantumCircuit(qr)
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circuit.h(qr[0])
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circuit.h(qr[1])
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circuit.cx(qr[0], qr[1])
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circuit.cx(qr[0], qr[1])
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circuit.cx(qr[0], qr[1])
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circuit.cx(qr[0], qr[1])
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circuit.cx(qr[1], qr[0])
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circuit.cx(qr[1], qr[0])
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dag = circuit_to_dag(circuit)
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pass_ = CountOps()
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_ = pass_.run(dag)
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self.assertDictEqual(pass_.property_set["count_ops"], {"cx": 6, "h": 2})
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if __name__ == "__main__":
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unittest.main()
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