Vendor things

third-party/vendor/swc_common/tests/concurrent.rs

@@ -0,0 +1,41 @@
+#![cfg(feature = "concurrent")]
+
+use std::{env, path::PathBuf, sync::Arc};
+
+use rayon::prelude::*;
+use swc_common::{sync::Lrc, FilePathMapping, SourceFile, SourceMap};
+
+#[test]
+fn no_overlap() {
+    let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+
+    let files: Vec<Lrc<SourceFile>> = (0..100000)
+        .into_par_iter()
+        .map(|_| {
+            cm.load_file(
+                &PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())
+                    .join("tests")
+                    .join("concurrent.js"),
+            )
+            .unwrap()
+        })
+        .collect::<Vec<_>>();
+
+    // This actually tests if there is overlap
+
+    let mut start = files.clone();
+    start.sort_by_key(|f| f.start_pos);
+    let mut end = files;
+    end.sort_by_key(|f| f.end_pos);
+
+    start
+        .into_par_iter()
+        .zip(end)
+        .for_each(|(start, end): (Arc<SourceFile>, Arc<SourceFile>)| {
+            assert_eq!(start.start_pos, end.start_pos);
+            assert_eq!(start.end_pos, end.end_pos);
+            assert!(start.start_pos < start.end_pos);
+
+            cm.lookup_char_pos(start.start_pos);
+        });
+}