PyTest: is one string in another strings?

Well, the fact the one string is not part of another string is rather difficult to show. Pytest will show ~250 characters.

import string

def get_string():
    return string.printable * 30

def test_long_strings():
    assert 'hello' in get_string()

pytest -q test_substring.py

Output

    def test_long_strings():
>       assert 'hello' in get_string()
E       assert 'hello' in '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c012345...x0b\x0c0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'
E        +  where '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c012345...x0b\x0c0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c' = get_string()