add tests

query-grammar/src/lib.rs

@@ -25,3 +25,21 @@ pub fn parse_query(query: &str) -> Result<UserInputAst, Error> {
 pub fn parse_query_lenient(query: &str) -> (UserInputAst, Vec<LenientError>) {
     parse_to_ast_lenient(query)
 }
+
+
+#[cfg(test)]
+mod tests {
+    use crate::parse_query;
+
+    #[test]
+    fn test_serialization() {
+        let ast = parse_query("title:hello").unwrap();
+        let json = serde_json::to_string(&ast).unwrap();
+        assert_eq!(json, r#"{"Leaf":{"Literal":{"field_name":"title","phrase":"hello","delimiter":"None","slop":0,"prefix":false}}}"#);
+    }
+
+    #[test]
+    fn test_parse_query_wrong_query() {
+        assert!(parse_query("title:").is_err());
+    }
+}