Macro assertables::assert_read_to_string_contains_as_result

macro_rules! assert_read_to_string_contains_as_result {
    ($reader:expr, $b_pattern:expr $(,)?) => { ... };
}

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

• When true, return Result Ok(()).

• When true, return Result Err with a diagnostic message.

Examples

use std::io::Read;
let mut reader = "hello".as_bytes();
let containee = "ell";
let x = assert_read_to_string_contains_as_result!(reader, containee);
//-> Ok(())
let actual = x.unwrap();
let expect = ();
assert_eq!(actual, expect);

let mut reader = "hello".as_bytes();
let containee = "xyz";
let x = assert_read_to_string_contains_as_result!(reader, containee);
//-> Err(…)
let actual = x.unwrap_err();
let expect = concat!(
    "assertion failed: `assert_read_to_string_contains!(left_reader, right_expr)`\n",
    " left reader name: `reader`,\n",
    "  right expr name: `containee`,\n",
    " left reader size: `5`,\n",
    " left reader data: `\"hello\"`,\n",
    "       right expr: `\"xyz\"`"
);
assert_eq!(actual, expect);