12         assert_se(signature_is_single("y", false));  in main()
13         assert_se(signature_is_single("u", false));  in main()
14         assert_se(signature_is_single("v", false));  in main()
15         assert_se(signature_is_single("as", false));  in main()
16         assert_se(signature_is_single("(ss)", false));  in main()
17         assert_se(!signature_is_single("()", false));  in main()
18         assert_se(!signature_is_single("(()()()()())", false));  in main()
19         assert_se(!signature_is_single("(((())))", false));  in main()
20         assert_se(signature_is_single("((((s))))", false));  in main()
21         assert_se(signature_is_single("{ss}", true));  in main()
22         assert_se(signature_is_single("a{ss}", false));  in main()
23         assert_se(!signature_is_single("uu", false));  in main()
24         assert_se(!signature_is_single("", false));  in main()
25         assert_se(!signature_is_single("(", false));  in main()
26         assert_se(!signature_is_single(")", false));  in main()
27         assert_se(!signature_is_single("())", false));  in main()
28         assert_se(!signature_is_single("((())", false));  in main()
29         assert_se(!signature_is_single("{)", false));  in main()
30         assert_se(!signature_is_single("{}", true));  in main()
31         assert_se(!signature_is_single("{sss}", true));  in main()
32         assert_se(!signature_is_single("{s}", true));  in main()
33         assert_se(!signature_is_single("{ss}", false));  in main()
34         assert_se(!signature_is_single("{ass}", true));  in main()
35         assert_se(!signature_is_single("a}", true));  in main()