def test_int_to_bin():
    input = random.sample(range(1000), 10)
    for x in input:
        assert mybin(x) == bin(x)
def test_int_to_bin4():
    assert "-0b10" == mybin(-2)
def test_int_to_bin2():
    assert "0b0" == mybin(0)
def test_int_to_bin3():
    assert "0b10" == mybin(2)
def test_int_to_bin1():
    assert "0b1" == mybin(1)