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import unittest
import random

import numpy as np
from systemds.context import SystemDSContext

np.random.seed(7)

shape = (random.randrange(1, 25), random.randrange(1, 25))
m = np.random.rand(shape[0], shape[1])
mx = np.random.rand(1, shape[1])
my = np.random.rand(shape[0], 1)


class TestReverse(unittest.TestCase):

    sds: SystemDSContext = None

    @classmethod
    def setUpClass(cls):
        cls.sds = SystemDSContext(capture_stdout=True, logging_level=50)

    @classmethod
    def tearDownClass(cls):
        cls.sds.close()

    def test_basic(self):
        r = self.sds.from_numpy(m).rev().compute()
        self.assertTrue(np.allclose(r, np.flip(m, 0)))

    def test_empty(self):
        m_empty = np.asarray([[]])
        r = self.sds.from_numpy(np.asarray(m_empty)).rev().compute()
        self.assertTrue(np.allclose(r, m_empty))

    def test_x_axis(self):
        self.assertTrue(np.allclose(self.sds.from_numpy(mx).rev().compute(), mx))

    def test_y_axis(self):
        self.assertTrue(
            np.allclose(self.sds.from_numpy(my).rev().compute(), np.flip(my, 0))
        )


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