Test for null behavior with ext/mbstring functions

diff --git a/ext/mbstring/tests/mb_str_functions_opt-parameter.phpt b/ext/mbstring/tests/mb_str_functions_opt-parameter.phpt
new file mode 100644 (file)
index 0000000..e4a235d
--- /dev/null
+++ b/ext/mbstring/tests/mb_str_functions_opt-parameter.phpt
@@ -0,0 +1,32 @@
+--TEST--
+Optional long parameter might be null
+--FILE--
+<?php
+echo mb_strpos('abb', 'b', null, 'UTF-8') . "\n";
+echo mb_strrpos('abb', 'b', null, 'UTF-8') . "\n";
+echo mb_stripos('abb', 'B', null, 'UTF-8') . "\n";
+echo mb_strripos('abb', 'B', null, 'UTF-8') . "\n";
+echo mb_strstr('foobarbaz', 'ba', null, 'UTF-8') . "\n";
+echo mb_strrchr('foobarbaz', 'ba', null, 'UTF-8') . "\n";
+echo mb_stristr('foobarbaz', 'BA', null, 'UTF-8') . "\n";
+echo mb_strrichr('foobarbaz', 'BA', null, 'UTF-8') . "\n";
+echo mb_substr('foobarbaz', 6, null, 'UTF-8') . "\n";
+echo mb_strcut('foobarbaz', 6, null, 'UTF-8') . "\n";
+echo mb_strimwidth('foobar', 0, 3, null, 'UTF-8') . "\n";
+?>
+==DONE==
+--EXPECT--
+1
+2
+1
+2
+barbaz
+baz
+barbaz
+baz
+baz
+baz
+foo
+==DONE==
+--XFAIL--
+mb functions fail to allow null instead of actual value