Macro assertables::assert_fs_read_to_string_matches

source · 
macro_rules! assert_fs_read_to_string_matches {
    ($a_path:expr, $b_matcher:expr $(,)?) => { ... };
    ($a_path:expr, $b_matcher:expr, $($message:tt)+) => { ... };
}
Expand description

Assert a std::fs::read_to_string() is a match to a regex.

  • If true, return ().

  • Otherwise, call panic! with a message and the values of the expressions with their debug representations.

§Examples

use std::io::Read;
use regex::Regex;

// Return Ok
let path = "alfa.txt";
let matcher = Regex::new(r"alfa").unwrap();
assert_fs_read_to_string_matches!(&path, matcher);
//-> ()

// Panic with error message
let result = panic::catch_unwind(|| {
let path = "alfa.txt";
let matcher = Regex::new(r"zzz").unwrap();
assert_fs_read_to_string_matches!(&path, matcher);
//-> panic!
});
assert!(result.is_err());
let actual = result.unwrap_err().downcast::<String>().unwrap().to_string();
let expect = concat!(
    "assertion failed: `assert_fs_read_to_string_matches!(left_path, right_matcher)`\n",
    "     left_path label: `&path`,\n",
    "     left_path debug: `\"alfa.txt\"`,\n",
    " right_matcher label: `matcher`,\n",
    " right_matcher debug: `Regex(\"zzz\")`,\n",
    "                left: `\"alfa\\n\"`,\n",
    "               right: `Regex(\"zzz\")`"
);
assert_eq!(actual, expect);

§Module macros