Macro assertables::assert_command_stderr_eq

macro_rules! assert_command_stderr_eq {
    ($left_command:expr, $right_command:expr $(,)?) => { ... };
    ($left_command:expr, $right_command:expr, $($arg:tt)+) => { ... };
}

Assert a command stderr string is equal to another.

• When true, return ().

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

Examples

use std::process::Command;

let mut a = Command::new("printf");
let mut b = Command::new("printf");
assert_command_stderr_eq!(a, b);
//-> ()

let mut a = Command::new("printf");
let mut b = Command::new("printf");
b.args(["-v"]);
assert_command_stderr_eq!(a, b);
//-> panic!("…")
// assertion failed: `assert_command_stderr_eq!(left_command, right_command)`
//   left command program: `\"printf\"`,
//  right command program: `\"printf\"`,
//   left stderr: `\"usage: printf format [arguments ...]\\n\"`,
//  right stderr: `\"printf: illegal option -- v\\n\"`

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