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import unittest

import numpy as np
from systemds.context import SystemDSContext


class TestSourceReuse(unittest.TestCase):

    sds: SystemDSContext = None
    source_reuse = None

    @classmethod
    def setUpClass(cls):
        cls.sds = SystemDSContext()
        cls.source_reuse = cls.sds.source("./tests/source/source_01.dml",
                              "test")

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

    def test_01_single_call(self):
        self.call()

    def test_02_second_call(self):
        self.call()

    def test_03_same_function(self):
        s = self.sds.source("./tests/source/source_01.dml",
                              "test")
        c = s.test_01().compute()
        d = s.test_01().compute()
        self.assertTrue(np.allclose(c, d))

    def call(self):
        c = self.source_reuse.test_01()
        res = c.compute()
        self.assertEqual(1, self.imports(c.script_str))
        self.assertTrue(np.allclose(np.array([[1]]), res))


    def imports(self, script:str) -> int:
        return script.split("\n").count('source("./tests/source/source_01.dml") as test')

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