add matlab test for nrRateRecoverPolar()

tests/matlab/test_nrRateRecoverPolar.py

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+import matlab.engine
+import itertools
+import numpy as np
+import pytest
+
+from py3gpp.nrRateRecoverPolar import nrRateRecoverPolar
+
+def run_nrRateRecoverPolar(N, eng):
+    K = 56
+    cw = np.arange(N)
+    ref_data = eng.nrRateRecoverPolar(eng.transpose(eng.double(cw)), eng.double(K), eng.double(N))
+    ref_data = np.array(list(itertools.chain(*ref_data)))
+
+    data = nrRateRecoverPolar(cw, K, N, False)
+
+    assert (ref_data == data).all()
+
+@pytest.fixture(scope='session')
+def eng():
+    eng = matlab.engine.connect_matlab()
+    yield eng
+    eng.quit()
+
+@pytest.mark.parametrize("N", [512, 256, 128])
+def test_nrRateRecoverPolar(N, eng):
+    run_nrRateRecoverPolar(N, eng)
+
+if __name__ == '__main__':
+    _eng = matlab.engine.connect_matlab()
+    test_nrRateRecoverPolar(512, _eng)
+    _eng.quit()