1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/anyhow/tests/test_convert.rs b/third_party/rust/anyhow/tests/test_convert.rs
new file mode 100644
index 0000000000..6da171d1b8
--- /dev/null
+++ b/third_party/rust/anyhow/tests/test_convert.rs
@@ -0,0 +1,46 @@
+#![allow(clippy::unnecessary_wraps)]
+
+mod drop;
+
+use self::drop::{DetectDrop, Flag};
+use anyhow::{Error, Result};
+use std::error::Error as StdError;
+
+#[test]
+fn test_convert() {
+    let has_dropped = Flag::new();
+    let error = Error::new(DetectDrop::new(&has_dropped));
+    let box_dyn = Box::<dyn StdError>::from(error);
+    assert_eq!("oh no!", box_dyn.to_string());
+    drop(box_dyn);
+    assert!(has_dropped.get());
+}
+
+#[test]
+fn test_convert_send() {
+    let has_dropped = Flag::new();
+    let error = Error::new(DetectDrop::new(&has_dropped));
+    let box_dyn = Box::<dyn StdError + Send>::from(error);
+    assert_eq!("oh no!", box_dyn.to_string());
+    drop(box_dyn);
+    assert!(has_dropped.get());
+}
+
+#[test]
+fn test_convert_send_sync() {
+    let has_dropped = Flag::new();
+    let error = Error::new(DetectDrop::new(&has_dropped));
+    let box_dyn = Box::<dyn StdError + Send + Sync>::from(error);
+    assert_eq!("oh no!", box_dyn.to_string());
+    drop(box_dyn);
+    assert!(has_dropped.get());
+}
+
+#[test]
+fn test_question_mark() -> Result<(), Box<dyn StdError>> {
+    fn f() -> Result<()> {
+        Ok(())
+    }
+    f()?;
+    Ok(())
+}