--- /dev/null
+--TEST--
+message to callback
+--SKIPIF--
+<?php
+include "skipif.inc";
+?>
+--FILE--
+<?php
+
+echo "Test\n";
+
+$m = new http\Message("HTTP/1.1 200 Ok");
+$m->addHeader("Content-Type", "text/plain");
+$m->getBody()->append("this\nis\nthe\ntext");
+
+$d = new http\Encoding\Stream\Deflate;
+$s = "";
+$m->toCallback(function ($m, $data) use ($d, &$s) {
+ $s.=$d->update($data);
+});
+$s.=$d->finish();
+var_dump($m->toString() === http\Encoding\Stream\Inflate::decode($s));
+
+?>
+Done
+--EXPECT--
+Test
+bool(true)
+Done