1 files changed, 23 insertions, 0 deletions
diff --git a/third_party/rust/yaml-rust/tests/test_round_trip.rs b/third_party/rust/yaml-rust/tests/test_round_trip.rs
new file mode 100644
index 0000000000..bfa9602751
--- /dev/null
+++ b/third_party/rust/yaml-rust/tests/test_round_trip.rs
@@ -0,0 +1,23 @@
+extern crate yaml_rust;
+
+use yaml_rust::{Yaml, YamlEmitter, YamlLoader};
+
+fn test_round_trip(original: &Yaml) {
+    let mut out = String::new();
+    YamlEmitter::new(&mut out).dump(original).unwrap();
+    let documents = YamlLoader::load_from_str(&out).unwrap();
+    assert_eq!(documents.len(), 1);
+    assert_eq!(documents[0], *original);
+}
+
+#[test]
+fn test_escape_character() {
+    let y = Yaml::String("\x1b".to_owned());
+    test_round_trip(&y);
+}
+
+#[test]
+fn test_colon_in_string() {
+    let y = Yaml::String("x: %".to_owned());
+    test_round_trip(&y);
+}