Added QRE tests.

.github/workflows/continuous_integration.yml

@@ -82,6 +82,12 @@ jobs:
         python -m pip install openbabel-wheel
       if: always()
 
+    - name: Install dependencies for QRE
+      run: |
+        pip install openfermionpyscf
+        pip install benchq
+      if: always()
+
     - name: tangelo tests
       run: |
         cd tangelo

tangelo/toolboxes/circuits/tests/test_qre.py

@@ -0,0 +1,43 @@
+# Copyright SandboxAQ 2021-2024.
+#
+# 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
+#
+#   http://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 unittest
+
+from tangelo.molecule_library import mol_H10_321g
+from tangelo.toolboxes.circuits.qre import qre_benchq, qre_pennylane
+
+class QRETest(unittest.TestCase):
+
+    def test_qre_benchq(self):
+        """Test the QRE output type for the benchq interface."""
+
+        n_toffolis, n_qubits = qre_benchq(mol_H10_321g, 1e-6)
+
+        self.assertIsInstance(n_toffolis, int)
+        self.assertIsInstance(n_qubits, int)
+
+        # As done in tests/benchq/problem_embeddings/test_qpe.py in benchq repo.
+        self.assertGreater(n_qubits, mol_H10_321g.n_active_sos)
+
+    def test_qre_pennylane(self):
+        """Test the QRE output type for the pennylane interface."""
+
+        output = qre_pennylane(mol_H10_321g)
+
+        self.assertIsInstance(output.gates, int)
+        self.assertIsInstance(output.qubits, int)
+
+
+if __name__ == "__main__":
+    unittest.main()