def test_product_strings():
    assert pytest1.product('Hello ',3) == 'Hello Hello Hello '
    result = pytest1.product('Hello ')
    assert result == 'Hello Hello '
    assert type(result) is str
    assert 'Hello' in result
    
def test_product():
    assert pytest1.product(5, 3) == 15
    assert pytest1.product(7) == 14