//! This test checks if unstable feature usage metric dump files `unstable-feature-usage*.json` work //! as expected. //! //! - Basic sanity checks on a default ICE dump. //! //! See . //! //! # Test history //! //! - forked from dump-ice-to-disk test, which has flakeyness issues on i686-mingw, I'm assuming //! those will be present in this test as well on the same platform //@ ignore-windows //FIXME(#128911): still flakey on i686-mingw. use std::path::{Path, PathBuf}; use run_make_support::rfs::create_dir_all; use run_make_support::{ cwd, filename_contains, has_extension, rfs, run_in_tmpdir, rustc, serde_json, shallow_find_files, }; fn find_feature_usage_metrics>(dir: P) -> Vec { shallow_find_files(dir, |path| { if filename_contains(path, "unstable_feature_usage") && has_extension(path, "json") { true } else { dbg!(path); false } }) } fn main() { test_metrics_dump(); test_metrics_errors(); } #[track_caller] fn test_metrics_dump() { run_in_tmpdir(|| { let metrics_dir = cwd().join("metrics"); create_dir_all(&metrics_dir); rustc() .input("main.rs") .incremental("incremental") .env("RUST_BACKTRACE", "short") .arg(format!("-Zmetrics-dir={}", metrics_dir.display())) .run(); let mut metrics = find_feature_usage_metrics(&metrics_dir); let json_path = metrics.pop().expect("there should be one metrics file in the output directory"); // After the `pop` above, there should be no files left. assert!( metrics.is_empty(), "there should be no more than one metrics file in the output directory" ); let message = rfs::read_to_string(json_path); let mut parsed: serde_json::Value = serde_json::from_str(&message).expect("metrics should be dumped as json"); // remove timestamps assert!(parsed["lib_features"][0]["timestamp"].is_number()); assert!(parsed["lang_features"][0]["timestamp"].is_number()); parsed["lib_features"][0]["timestamp"] = serde_json::json!(null); parsed["lang_features"][0]["timestamp"] = serde_json::json!(null); let expected = serde_json::json!( { "lib_features":[{"symbol":"ascii_char", "timestamp":null}], "lang_features":[{"symbol":"box_patterns","since":null, "timestamp":null}] } ); assert_eq!(expected, parsed); }); } #[track_caller] fn test_metrics_errors() { run_in_tmpdir(|| { rustc() .input("main.rs") .incremental("incremental") .env("RUST_BACKTRACE", "short") .arg("-Zmetrics-dir=invaliddirectorythatdefinitelydoesntexist") .run_fail() .assert_stderr_contains( "error: cannot dump feature usage metrics: No such file or directory", ) .assert_stdout_not_contains("internal compiler error"); }); }