import unittest
from nnthvn.module1 import add, multiply

class TestModule1(unittest.TestCase):
    def test_add(self):
        self.assertEqual(add(2, 3), 5)
        self.assertEqual(add(-1, 1), 0)

    def test_multiply(self):
        self.assertEqual(multiply(3, 4), 12)
        self.assertEqual(multiply(-2, 5), -10)

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