class IntegerList:
    def __init__(self, *args):
        self.__data = []
        for x in args:
            if type(x) == int:
                self.__data.append(x)

    def get_data(self):
        return self.__data

    def add(self, element):
        if not type(element) == int:
            raise ValueError("Element is not Integer")
        self.get_data().append(element)
        return self.get_data()

    def remove_index(self, index):
        if index >= len(self.get_data()):
            raise IndexError("Index is out of range")
        a = self.get_data()[index]
        del self.get_data()[index]
        return a

    def get(self, index):
        if index >= len(self.get_data()):
            raise IndexError("Index is out of range")
        return self.get_data()[index]


import unittest


class Tests(unittest.TestCase):
    def test_should_return_3(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        self.assertEqual(len(listen.get_data()), 3)

    def test_should_return_2(self):
        listen = IntegerList('a', 53464564, 8978970890)
        self.assertEqual(len(listen.get_data()), 2)

    def test_add_should_work(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        listen.add(7)
        self.assertEqual(len(listen.get_data()), 4)

    def test_add_should_throw_error(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        with self.assertRaises(ValueError):
            listen.add("kek")

    def test_remove_should_work(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        listen.remove_index(0)
        self.assertTrue(len(listen.get_data()), 2)

    def test_remove_should_throw_error(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        with self.assertRaises(IndexError):
            listen.remove_index(5)

    def test_get_should_work(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        a = listen.get(0)
        self.assertTrue(a, 12312)

    def test_get_should_throw_error(self):
        listen = IntegerList(12312, 53464564, 8978970890)
        with self.assertRaises(IndexError):
            listen.get(5)


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