// A flag named dump-mono-stats was added to the compiler in 2022, which
// collects stats on instantiation of items and their associated costs.
// This test checks that the output stat file exists, and that it contains
// a specific expected string.
// See https://github.com/rust-lang/rust/pull/105481

use run_make_support::{cwd, fs_wrapper, rustc};

fn main() {
    rustc().crate_type("lib").input("foo.rs").dump_mono_stats(cwd()).arg("-Zdump-mono-stats-format=json").run();
    assert!(fs_wrapper::read_to_string("foo.mono_items.json").contains("\"name\":\"bar\"");
}