- Add a test for bug #43993.

ext/mbstring/tests/bug43993.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Bug #43993 (mb_substr_count() behaves differently to substr_count() with overlapping needles)
+--SKIPIF--
+<?php extension_loaded('mbstring') or die('skip mbstring not available'); ?>
+--FILE--
+<?php
+var_dump(mb_substr_count("abcabcabca", "abcabc"));
+var_dump(mb_substr_count("abcabcabca", "abc"));
+var_dump(mb_substr_count("abcabcabca", "cab"));
+var_dump(mb_substr_count("abcabcabca", "bca"));
+var_dump(mb_substr_count("ababababab", "ba"));
+var_dump(mb_substr_count("ababababab", "ab"));
+var_dump(mb_substr_count("ababababab", "bc"));
+var_dump(mb_substr_count("aaaaaaaaaa", "a"));
+var_dump(mb_substr_count("aaaaaaaaaa", "b"));
+?>
+--EXPECT--
+int(1)
+int(3)
+int(2)
+int(3)
+int(4)
+int(5)
+int(0)
+int(10)
+int(0)