src/main/python/tests/matrix/test_diag.py

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import unittest
import numpy as np
from systemds.context import SystemDSContext


class TestDIAG(unittest.TestCase):
    def setUp(self):
        self.sds = SystemDSContext(capture_stdout=True, logging_level=50)

    def tearDown(self):
        self.sds.close()

    def test_diag_basic1(self):
        input_matrix = np.array([1, 2, 3, 4])

        sds_input = self.sds.from_numpy(input_matrix)
        sds_result = sds_input.diag().compute()
        np_result = np.diag(input_matrix)
        print(np_result)
        print(sds_result)
        assert np.allclose(sds_result, np_result, 1e-9)

    def test_diag_basic2(self):
        input_matrix = np.array(
            [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], [13, 14, 15, 16]]
        )

        sds_input = self.sds.from_numpy(input_matrix)
        sds_result = sds_input.diag().compute()
        np_result = np.reshape(np.diag(input_matrix), (-1, 1))
        assert np.allclose(sds_result, np_result, 1e-9)

    def test_diag_random1(self):
        input_matrix = np.random.random(10)
        sds_input = self.sds.from_numpy(input_matrix)
        sds_result = sds_input.diag().compute()
        np_result = np.diag(input_matrix)
        assert np.allclose(sds_result, np_result, 1e-9)

    def test_diag_random2(self):
        input_matrix = np.random.random((10, 10))
        sds_input = self.sds.from_numpy(input_matrix)
        sds_result = sds_input.diag().compute()
        np_result = np.reshape(np.diag(input_matrix), (-1, 1))
        assert np.allclose(sds_result, np_result, 1e-9)


if __name__ == "__main__":
    unittest.main()