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//! 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 <https://github.com/rust-lang/rust/issues/129485>.
//!
//! # 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<P: AsRef<Path>>(dir: P) -> Vec<PathBuf> {
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("lib.rs")
.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 parsed: serde_json::Value =
serde_json::from_str(&message).expect("metrics should be dumped as json");
let expected = serde_json::json!(
{
"lib_features":[{"symbol":"ascii_char"}],
"lang_features":[{"symbol":"box_patterns","since":null}]
}
);
assert_eq!(expected, parsed);
});
}
#[track_caller]
fn test_metrics_errors() {
run_in_tmpdir(|| {
rustc()
.input("lib.rs")
.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");
});
}
|
