Macro assertables::assert_program_args_stderr_eq_other_as_result

macro_rules! assert_program_args_stderr_eq_other_as_result {
    ($a_program:expr, $a_args:expr, $b_program:expr, $b_args:expr $(,)?) => { ... };
}

Assert a command (built with program and args) stderr string is equal to another.

• If true, return Result Ok(()).

• Otherwise, return Result Err with a diagnostic message.

Examples

let a_program = "printf";
let a_args: [&str; 0] = [];
let b_program = "printf";
let b_args: [&str; 0] = [];
let x = assert_program_args_stderr_eq_other_as_result!(&a_program, &a_args, &b_program, &b_args);
//-> Ok(())
let actual = x.unwrap();
let expect = ();
assert_eq!(actual, expect);

let a_program = "printf";
let a_args: [&str; 0] = [];
let b_program = "printf";
let b_args = ["-v"];
let x = assert_program_args_stderr_eq_other_as_result!(&a_program, &a_args, &b_program, &b_args);
//-> Err(…)
let actual = x.unwrap_err();
let expect = concat!(
    "assertion failed: `assert_program_args_stderr_eq_other!(left_program, left_args, right_program, right_args)`\n",
    "  left_program label: `&a_program`,\n",
    "  left_program debug: `\"printf\"`,\n",
    "     left_args label: `&a_args`,\n",
    "     left_args debug: `[]`,\n",
    " right_program label: `&b_program`,\n",
    " right_program debug: `\"printf\"`,\n",
    "    right_args label: `&b_args`,\n",
    "    right_args debug: `[\"-v\"]`,\n",
    "                left: `\"usage: printf format [arguments ...]\\n\"`,\n",
    "               right: `\"printf: illegal option -- v\\nusage: printf format [arguments ...]\\n\"`"
);
assert_eq!(actual, expect);

This macro has a second form where a custom message can be provided.