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-rw-r--r--ext/mbstring/tests/mb_internal_encoding_error2.phpt31
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diff --git a/ext/mbstring/tests/mb_internal_encoding_error2.phpt b/ext/mbstring/tests/mb_internal_encoding_error2.phpt
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+++ b/ext/mbstring/tests/mb_internal_encoding_error2.phpt
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+--TEST--
+Test mb_internal_encoding() function : error conditions - pass an unknown encoding
+--SKIPIF--
+<?php
+extension_loaded('mbstring') or die('skip');
+function_exists('mb_internal_encoding') or die("skip mb_internal_encoding() is not available in this build");
+?>
+--FILE--
+<?php
+/* Prototype : string mb_internal_encoding([string $encoding])
+ * Description: Sets the current internal encoding or
+ * Returns the current internal encoding as a string
+ * Source code: ext/mbstring/mbstring.c
+ */
+
+/*
+ * Pass mb_internal_encoding an unknown encoding
+ */
+
+echo "*** Testing mb_internal_encoding() : error conditions ***\n";
+
+var_dump(mb_internal_encoding('unknown-encoding'));
+
+echo "Done";
+?>
+--EXPECTF--
+*** Testing mb_internal_encoding() : error conditions ***
+
+Warning: mb_internal_encoding(): Unknown encoding "unknown-encoding" in %s on line %d
+bool(false)
+Done