test(token): Verify empty until behavior

src/token/tests.rs

@@ -97,6 +97,21 @@ fn complete_take_until() {
     );
 }
 
+#[test]
+fn complete_take_until_empty() {
+    fn take_until_empty(i: &str) -> IResult<&str, &str> {
+        take_until(0, "").parse_peek(i)
+    }
+    #[cfg(not(feature = "simd"))]
+    assert_eq!(
+        take_until_empty(""),
+        Err(ErrMode::Backtrack(error_position!(&"", ErrorKind::Slice)))
+    );
+    #[cfg(feature = "simd")]
+    assert_eq!(take_until_empty(""), Ok(("", "")));
+    assert_eq!(take_until_empty("end"), Ok(("end", "")));
+}
+
 #[test]
 fn complete_literal_case_insensitive() {
     fn caseless_bytes(i: &[u8]) -> IResult<&[u8], &[u8]> {