test(parse): add neg test

Author: GreasySlug

crates/erg_parser/tests/parse_test.rs

@@ -84,6 +84,11 @@ fn parse_invalid_class_definition() -> Result<(), ()> {
     expect_failure("tests/invalid_class_definition.er", 0, 7)
 }
 
+#[test]
+fn parse_missing_paren() -> Result<(), ()> {
+    expect_failure("tests/missing_paren.er", 0, 1)
+}
+
 #[test]
 fn parse_warns() -> Result<(), ()> {
     expect_success("tests/warns.er", 1)

crates/erg_parser/tests/unmatched_paren.er

@@ -0,0 +1 @@
+func a, b) = a + b