From f72e435759e8fafe3b06af35072c1907ba016546 Mon Sep 17 00:00:00 2001
From: Oleg Pudeyev <oleg@bsdpower.com>
Date: Tue, 4 Dec 2012 02:21:53 -0500
Subject: [PATCH] [ticket/10103] Test for flock lock class, with concurrency no
 less.

PHPBB3-10103
---
 tests/lock/flock_test.php | 108 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 tests/lock/flock_test.php

diff --git a/tests/lock/flock_test.php b/tests/lock/flock_test.php
new file mode 100644
index 0000000000..5c645de27c
--- /dev/null
+++ b/tests/lock/flock_test.php
@@ -0,0 +1,108 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+class phpbb_lock_flock_test extends phpbb_test_case
+{
+	public function test_lock()
+	{
+		$path = __DIR__ . '/../tmp/precious';
+
+		$lock = new phpbb_lock_flock($path);
+		$ok = $lock->acquire();
+		$this->assertTrue($ok);
+		$lock->release();
+	}
+
+	public function test_consecutive_locking()
+	{
+		$path = __DIR__ . '/../tmp/precious';
+
+		$lock = new phpbb_lock_flock($path);
+		$ok = $lock->acquire();
+		$this->assertTrue($ok);
+		$lock->release();
+
+		$ok = $lock->acquire();
+		$this->assertTrue($ok);
+		$lock->release();
+
+		$ok = $lock->acquire();
+		$this->assertTrue($ok);
+		$lock->release();
+	}
+
+	/* This hangs the process.
+	public function test_concurrent_locking_fail()
+	{
+		$path = __DIR__ . '/../tmp/precious';
+
+		$lock1 = new phpbb_lock_flock($path);
+		$ok = $lock1->acquire();
+		$this->assertTrue($ok);
+
+		$lock2 = new phpbb_lock_flock($path);
+		$ok = $lock2->acquire();
+		$this->assertFalse($ok);
+
+		$lock->release();
+		$ok = $lock2->acquire();
+		$this->assertTrue($ok);
+	}
+	*/
+
+	public function test_concurrent_locking()
+	{
+		if (!function_exists('pcntl_fork'))
+		{
+			$this->markTestSkipped('pcntl extension and pcntl_fork are required for this test');
+		}
+
+		$path = __DIR__ . '/../tmp/precious';
+
+		if ($pid = pcntl_fork())
+		{
+			// parent
+			// wait 0.5 s, acquire the lock, note how long it took
+			sleep(0.5);
+
+			$lock = new phpbb_lock_flock($path);
+			$start = time();
+			$ok = $lock->acquire();
+			$delta = time() - $start;
+			$this->assertTrue($ok);
+			$this->assertTrue($delta > 0.5);
+
+			$lock->release();
+
+			// acquire again, this should be instantaneous
+			$start = time();
+			$ok = $lock->acquire();
+			$delta = time() - $start;
+			$this->assertTrue($ok);
+			$this->assertTrue($delta < 0.1);
+
+			// reap the child
+			$status = null;
+			pcntl_waitpid($pid, $status);
+		}
+		else
+		{
+			// child
+			// immediately acquire the lock and sleep for 2 s
+			$lock = new phpbb_lock_flock($path);
+			$ok = $lock->acquire();
+			$this->assertTrue($ok);
+			sleep(2);
+			$lock->release();
+
+			// and go away silently
+			pcntl_exec('/usr/bin/env', array('true'));
+		}
+	}
+}