Assert a command (built with program and args) stdout string is equal to an expression.
let program = "bin/printf-stdout"; let args = ["%s", "hello"]; let s = "hello"; assert_program_args_stdout_eq_expr!(&program, &args, s);
assert_program_args_stdout_eq_expr
assert_program_args_stdout_eq_expr_as_result
debug_assert_program_args_stdout_eq_expr