Add test case for bug #77080

Author: cmb69

ext/standard/tests/streams/bug77080.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #77080 (Deflate not working)
+--SKIPIF--
+<?php
+if (!extension_loaded('zlib')) die('skip zlib extension not available');
+?>
+--FILE--
+<?php
+$string = str_repeat("0123456789", 100);
+$stream = fopen('data://text/plain,' . $string,'r');
+stream_filter_append($stream, 'zlib.deflate', STREAM_FILTER_READ, 6);
+$compressed = stream_get_contents($stream);
+var_dump(gzinflate($compressed) === $string);
+?>
+--EXPECT--
+bool(true)