test: simple test sequential vs multi observable

Author: hJaffaliColibritd

tests/execution/test_multi_observable.py

@@ -0,0 +1,15 @@
+import pytest
+
+from mpqp import QCircuit
+from mpqp.core.instruction import Observable, ExpectationMeasure
+from mpqp.execution import AvailableDevice, run
+
+
+
+def test_sequential_versus_multi(circuit: QCircuit, observables: list[Observable], device: AvailableDevice):
+    seq_results = [run(circuit + QCircuit([ExpectationMeasure(obs, shots=0)]), device) for obs in observables]
+
+    multi_result = run(circuit + QCircuit([ExpectationMeasure(observables, shots=0)]))
+
+    for r1, r2 in zip(seq_results, multi_result.results):
+        assert r1.expectation_value == r2.expectation_value