Add tests executing a circuit on each fake backend

azure-pipelines.yml

@@ -139,7 +139,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz
           displayName: 'Install dependencies'
@@ -190,7 +190,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |
@@ -244,7 +244,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |
@@ -303,7 +303,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |
@@ -357,7 +357,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
             sudo apt install -y graphviz
           displayName: 'Install dependencies'
@@ -412,7 +412,7 @@ stages:
             python -m pip install --upgrade pip
             pip install -U -r requirements.txt -r requirements-dev.txt -c constraints.txt
             pip install -c constraints.txt -e .
-            pip install "qiskit-ibmq-provider" -c constraints.txt
+            pip install "qiskit-ibmq-provider" "qiskit-aer" -c constraints.txt
             python setup.py build_ext --inplace
           displayName: 'Install dependencies'
         - bash: |

qiskit/qobj/qasm_qobj.py

@@ -363,6 +363,8 @@ def __init__(self, qobj_id=None, config=None, experiments=None,
         self.config = config or QasmQobjConfig()
         self.experiments = experiments or []
         self.qobj_id = qobj_id
+        self.type = 'QASM'
+        self.schema_version = '1.1.0'
 
     def to_dict(self, validate=False):
         """Return a dictionary format representation of the QASM Qobj.

qiskit/test/mock/fake_backend.py

@@ -123,9 +123,12 @@ def run(self, qobj):
                 job = sim.run(qobj, system_model)
             else:
                 sim = Aer.get_backend('qasm_simulator')
-                from qiskit.providers.aer.noise import NoiseModel
-                noise_model = NoiseModel.from_backend(self)
-                job = sim.run(qobj, noise_model=noise_model)
+                if self.properties():
+                    from qiskit.providers.aer.noise import NoiseModel
+                    noise_model = NoiseModel.from_backend(self)
+                    job = sim.run(qobj, noise_model=noise_model)
+                else:
+                    job = sim.run(qobj)
         else:
             if qobj.type == 'PULSE':
                 raise QiskitError("Unable to run pulse schedules without "

qiskit/test/mock/fake_openpulse_2q.py

@@ -215,15 +215,15 @@ def __init__(self):
             gates=[
                 Gate(gate='u1', name='u1_0', qubits=[0],
                      parameters=[
-                         Nduv(date=mock_time, name='gate_error', unit='', value=1.0),
+                         Nduv(date=mock_time, name='gate_error', unit='', value=0.06),
                          Nduv(date=mock_time, name='gate_length', unit='ns', value=0.)]),
                 Gate(gate='u3', name='u3_0', qubits=[0],
                      parameters=[
-                         Nduv(date=mock_time, name='gate_error', unit='', value=1.0),
+                         Nduv(date=mock_time, name='gate_error', unit='', value=0.06),
                          Nduv(date=mock_time, name='gate_length', unit='ns', value=2 * dt)]),
                 Gate(gate='u3', name='u3_1', qubits=[1],
                      parameters=[
-                         Nduv(date=mock_time, name='gate_error', unit='', value=1.0),
+                         Nduv(date=mock_time, name='gate_error', unit='', value=0.06),
                          Nduv(date=mock_time, name='gate_length', unit='ns', value=4 * dt)]),
                 Gate(gate='cx', name='cx0_1', qubits=[0, 1],
                      parameters=[

qiskit/test/mock/fake_qasm_simulator.py

@@ -28,9 +28,7 @@ def __init__(self):
             backend_name='fake_qasm_simulator',
             backend_version='0.0.0',
             n_qubits=5,
-            basis_gates=['u1', 'u2', 'u3', 'cx', 'cz', 'id', 'x', 'y', 'z',
-                         'h', 's', 'sdg', 't', 'tdg', 'ccx', 'swap',
-                         'snapshot', 'unitary'],
+            basis_gates=['u1', 'u2', 'u3', 'cx', 'id', 'unitary'],
             coupling_map=None,
             simulator=True,
             local=True,
@@ -42,3 +40,6 @@ def __init__(self):
         )
 
         super().__init__(configuration)
+
+    def properties(self):
+        return None

test/python/providers/test_fake_backends.py

@@ -0,0 +1,61 @@
+# -*- coding: utf-8 -*-
+
+# This code is part of Qiskit.
+#
+# (C) Copyright IBM 2020.
+#
+# This code is licensed under the Apache License, Version 2.0. You may
+# obtain a copy of this license in the LICENSE.txt file in the root directory
+# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+#
+# Any modifications or derivative works of this code must retain this
+# copyright notice, and modified files need to carry a notice indicating
+# that they have been altered from the originals.
+
+# pylint: disable=missing-class-docstring,missing-function-docstring
+# pylint: disable=missing-module-docstring
+
+import operator
+
+from test import combine
+from ddt import ddt
+
+from qiskit.circuit import QuantumCircuit
+from qiskit.execute import execute
+from qiskit.test.base import QiskitTestCase
+from qiskit.test.mock import FakeProvider
+from qiskit.test.mock.fake_backend import HAS_AER
+
+
+FAKE_PROVIDER = FakeProvider()
+
+
+@ddt
+class TestFakeBackends(QiskitTestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.circuit = QuantumCircuit(2)
+        cls.circuit.h(0)
+        cls.circuit.h(1)
+        cls.circuit.h(0)
+        cls.circuit.h(1)
+        cls.circuit.x(0)
+        cls.circuit.x(1)
+        cls.circuit.measure_all()
+
+    @combine(backend=FAKE_PROVIDER.backends(),
+             optimization_level=[0, 1, 2, 3])
+    def test_circuit_on_fake_backend(self, backend, optimization_level):
+        if not HAS_AER and backend.configuration().n_qubits > 20:
+            self.skipTest(
+                'Unable to run fake_backend %s without qiskit-aer' %
+                backend.configuration().backend_name)
+        job = execute(self.circuit, backend,
+                      optimization_level=optimization_level,
+                      seed_simulator=42, seed_transpiler=42)
+        result = job.result()
+        counts = result.get_counts()
+        max_count = max(counts.items(), key=operator.itemgetter(1))[0]
+        self.assertEqual(max_count, '11')