assertables

Macro assert_program_args_stderr_string_is_match

Source 
macro_rules! assert_program_args_stderr_string_is_match {
    ($a_program:expr, $a_args:expr, $matcher:expr $(,)?) => { ... };
    ($a_program:expr, $a_args:expr, $matcher:expr, $($message:tt)+) => { ... };
}
Expand description

Assert a command (built with program and args) stderr into a string is a match to a regex.

Pseudocode:
(a_program + a_args ⇒ command ⇒ stderr ⇒ string) is match (expr into string)

  • If true, return (a_program + a_args ⇒ command ⇒ stderr ⇒ string).

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

§Examples

use assertables::*;
use regex::Regex;

let program = "bin/printf-stderr";
let args = ["%s", "alfa"];
let matcher = Regex::new(r"lf").unwrap();
assert_program_args_stderr_string_is_match!(&program, &args, &matcher);

// This will panic
let program = "bin/printf-stderr";
let args = ["%s", "alfa"];
let matcher = Regex::new(r"zz").unwrap();
assert_program_args_stderr_string_is_match!(&program, &args, &matcher);
// assertion failed: `assert_program_args_stderr_string_is_match!(a_program, b_matcher)`
// https://docs.rs/assertables/9.4.0/assertables/macro.assert_program_args_stderr_string_is_match.html
//  a_program label: `&program`,
//  a_program debug: `\"bin/printf-stderr\"`,
//     a_args label: `&args`,
//     a_args debug: `[\"%s\", \"alfa\"]`,
//  b_matcher label: `&matcher`,
//  b_matcher debug: `Regex(\"zz\")`,
//                a: `\"alfa\"`,
//                b: `Regex(\"zz\")`

§Module macros