Expand description
Assert a command (built with program and args) stdout string is equal to an expression.
Pseudocode:
(program1 + args1 ⇒ command ⇒ stdout) = (expr into string)
§Example
use assertables::*;
let program = "bin/printf-stdout";
let args = ["%s", "alfa"];
let bytes = vec![b'a', b'l', b'f', b'a'];
assert_program_args_stdout_eq_expr!(&program, &args, &bytes);