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

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import unittest
import random

import numpy as np
from systemds.context import SystemDSContext
from systemds.operator.algorithm import split

# Seed the randomness.
np.random.seed(7)


class TestOrder(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):
        m = self.make_matrix()

        o = self.sds.from_numpy(m).compute()
        s = m
        self.assertTrue(np.allclose(o, s))

    def test_split(self):
        X = self.make_matrix()
        Y = self.make_matrix(cols=2)

        [p1, p2, p3, p4] = split(
            self.sds.from_numpy(X), self.sds.from_numpy(Y)
        ).compute()
        exp1 = X[:2]
        exp2 = X[2:]
        exp3 = Y[:2]
        exp4 = Y[2:]
        self.assertTrue(np.allclose(p1, exp1))
        self.assertTrue(np.allclose(p2, exp2))
        self.assertTrue(np.allclose(p3, exp3))
        self.assertTrue(np.allclose(p4, exp4))

    def test_split_2(self):
        rows = 10
        X = self.make_matrix(rows=rows)
        Y = self.make_matrix(rows=rows, cols=2)

        [p1, p2, p3, p4] = split(
            self.sds.from_numpy(X), self.sds.from_numpy(Y)
        ).compute()
        exp1 = X[:7]
        exp2 = X[7:]
        exp3 = Y[:7]
        exp4 = Y[7:]
        self.assertTrue(np.allclose(p1, exp1))
        self.assertTrue(np.allclose(p2, exp2))
        self.assertTrue(np.allclose(p3, exp3))
        self.assertTrue(np.allclose(p4, exp4))

    def test_split_3(self):
        rows = 100
        X = self.make_matrix(rows=rows)
        Y = self.make_matrix(rows=rows, cols=2)

        [p1, p2, p3, p4] = split(
            self.sds.from_numpy(X), self.sds.from_numpy(Y)
        ).compute()
        exp1 = X[:70]
        exp2 = X[70:]
        exp3 = Y[:70]
        exp4 = Y[70:]
        self.assertTrue(np.allclose(p1, exp1))
        self.assertTrue(np.allclose(p2, exp2))
        self.assertTrue(np.allclose(p3, exp3))
        self.assertTrue(np.allclose(p4, exp4))

    def test_split_4(self):
        rows = 100
        X = self.make_matrix(rows=rows)
        Y = self.make_matrix(rows=rows, cols=2)

        [p1, p2, p3, p4] = split(
            self.sds.from_numpy(X), self.sds.from_numpy(Y), f=0.2
        ).compute()
        exp1 = X[:20]
        exp2 = X[20:]
        exp3 = Y[:20]
        exp4 = Y[20:]
        self.assertTrue(np.allclose(p1, exp1))
        self.assertTrue(np.allclose(p2, exp2))
        self.assertTrue(np.allclose(p3, exp3))
        self.assertTrue(np.allclose(p4, exp4))

    def make_matrix(self, rows=4, cols=4):
        return np.random.rand(rows, cols)


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