Updated with pytest script for testing

tests/test_cuquantum_cutensor_backend.py

@@ -0,0 +1,38 @@
+import copy
+import os
+from timeit import default_timer as timer
+
+import config
+import numpy as np
+import pytest
+import qibo
+from qibo.models import QFT
+
+
+def qibo_qft(nqubits, swaps):
+    circ_qibo = QFT(nqubits, swaps)
+    state_vec = np.array(circ_qibo())
+    return circ_qibo, state_vec
+
+
+def time(func):
+    start = timer()
+    res = func()
+    end = timer()
+    time = end - start
+    return time, res
+
+
+@pytest.mark.parametrize("nqubits", [1, 2, 5, 10])
+def test_eval(nqubits: int):
+    import qibotn.cutn
+
+    # Test qibo
+    qibo.set_backend(backend=config.qibo.backend, platform=config.qibo.platform)
+    qibo_time, (qibo_circ, result_sv) = time(lambda: qibo_qft(nqubits, swaps=True))
+
+    # Test Cuquantum
+    cutn_time, result_tn = time(lambda: qibotn.cutn.eval(qibo_circ))
+
+    assert 1e-2 * qibo_time < cutn_time < 1e2 * qibo_time
+    assert np.allclose(result_sv, result_tn), "Resulting dense vectors do not match"