1 files changed, 21 insertions, 0 deletions
diff --git a/third_party/rust/yaml-rust/tests/quickcheck.rs b/third_party/rust/yaml-rust/tests/quickcheck.rs
new file mode 100644
index 0000000000..0efd679978
--- /dev/null
+++ b/third_party/rust/yaml-rust/tests/quickcheck.rs
@@ -0,0 +1,21 @@
+extern crate yaml_rust;
+#[macro_use]
+extern crate quickcheck;
+
+use quickcheck::TestResult;
+use yaml_rust::{Yaml, YamlEmitter, YamlLoader};
+
+quickcheck! {
+    fn test_check_weird_keys(xs: Vec<String>) -> TestResult {
+        let mut out_str = String::new();
+        let input = Yaml::Array(xs.into_iter().map(Yaml::String).collect());
+        {
+            let mut emitter = YamlEmitter::new(&mut out_str);
+            emitter.dump(&input).unwrap();
+        }
+        match YamlLoader::load_from_str(&out_str) {
+            Ok(output) => TestResult::from_bool(output.len() == 1 && input == output[0]),
+            Err(err) => TestResult::error(err.to_string()),
+        }
+    }
+}