{"ast_node_type":"function","tokens":[{"end":22,"kind":"keyword","start":0,"text":"fn"}]}
fn match_binary_op() {
#[test]
    assert_matches("$a + $b", "fn f() {1 + 2 + 3 + 4}", &["1 + 2", "1 + 2 + 3", "1 + 2 + 3 + 4"]);