From 0f811d1c323bae50de18baa56284b737a1be5bcd Mon Sep 17 00:00:00 2001
From: "K.Kosako" <kkosako0@gmail.com>
Date: Fri, 22 Feb 2019 14:11:55 +0900
Subject: [PATCH] add test cases for improve coverage

---
 test/test_utf8.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/test_utf8.c b/test/test_utf8.c
index 1397a2f..ef2f921 100644
--- a/test/test_utf8.c
+++ b/test/test_utf8.c
@@ -656,6 +656,25 @@ extern int main(int argc, char* argv[])
   x2("[a]*[b]", "aab", 0, 3); // up coverage
   n("a*\\W", "aaa"); // up coverage
   n("(?W)a*\\W", "aaa"); // up coverage
+  x2("(?<=ab(?<=ab))", "ab", 2, 2); // up coverage
+  x2("(?<x>a)(?<x>b)(\\k<x>)+", "abbaab", 0, 6); // up coverage
+  x2("()(\\1)(\\2)", "abc", 0, 0); // up coverage
+  x2("((?(a)b|c))(\\1)", "abab", 0, 4); // up coverage
+  x2("(?<x>$|b\\g<x>)", "bbb", 0, 3); // up coverage
+  x2("(?<x>(?(a)a|b)|c\\g<x>)", "cccb", 0, 4); // up coverage
+  x2("(a)(?(1)a*|b*)+", "aaaa", 0, 4); // up coverage
+  x2("[[^abc]&&cde]*", "de", 0, 2); // up coverage
+  n("(a){10}{10}", "aa"); // up coverage
+  x2("(?:a?)+", "aa", 0, 2); // up coverage
+  x2("(?:a?)*?", "a", 0, 0); // up coverage
+  x2("(?:a*)*?", "a", 0, 0); // up coverage
+  x2("(?:a+?)*", "a", 0, 1); // up coverage
+  x2("\\h", "5", 0, 1); // up coverage
+  x2("\\H", "z", 0, 1); // up coverage
+  x2("[\\h]", "5", 0, 1); // up coverage
+  x2("[\\H]", "z", 0, 1); // up coverage
+  x2("[\\o{101}]", "A", 0, 1); // up coverage
+  x2("[\\u0041]", "A", 0, 1); // up coverage
 
   x2("(?~)", "", 0, 0);
   x2("(?~)", "A", 0, 0);
-- 
2.40.0