Expand description

Assert a std::io::Read read_to_string() contains a pattern.

Pseudocode:
(reader.read_to_string(a) ⇒ a) contains (expr into string)

§Example

use std::io::Read;

let mut reader = "hello".as_bytes();
let containee = "ell";
assert_io_read_to_string_contains!(reader, &containee);

§Module macros