Add test for split fallback

Author: bukka

sapi/fpm/tests/log-bwp-msg-flush-split-fallback.phpt

@@ -0,0 +1,52 @@
+--TEST--
+FPM: Buffered worker output plain log with msg with flush split in buffer
+--SKIPIF--
+<?php include "skipif.inc"; ?>
+--FILE--
+<?php
+
+require_once "tester.inc";
+
+$cfg = <<<EOT
+[global]
+error_log = {{FILE:LOG}}
+[unconfined]
+listen = {{ADDR}}
+pm = dynamic
+pm.max_children = 5
+pm.start_servers = 1
+pm.min_spare_servers = 1
+pm.max_spare_servers = 3
+catch_workers_output = yes
+decorate_workers_output = no
+EOT;
+
+$code = <<<EOT
+<?php
+file_put_contents('php://stderr', str_repeat('a', 1021) . "\0fabc");
+EOT;
+
+$tester = new FPM\Tester($cfg, $code);
+$tester->start();
+$tester->expectLogStartNotices();
+$tester->request()->expectEmptyBody();
+$tester->terminate();
+$lines = $tester->getLogLines(2);
+//var_dump($lines);
+var_dump($lines[0] === str_repeat('a', 1022)  . "\0f\n");
+var_dump($lines[1] === "abc\n");
+$tester->close();
+
+?>
+Done
+--EXPECT--
+bool(true)
+bool(true)
+Done
+--CLEAN--
+<?php
+require_once "tester.inc";
+FPM\Tester::clean();
+?>
+--XFAIL--
+Zero byte is not working in the split for some reason