<?php

/*

 * This file is part of the Assetic package, an OpenSky project.

 *

 * (c) 2010-2011 OpenSky Project Inc

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Assetic\Test\Cache;

use Assetic\Cache\ExpiringCache;

class ExpiringCacheTest extends \PHPUnit_Framework_TestCase

{

    private $inner;

    private $lifetime;

    private $cache;

    protected function setUp()

    {

        $this->inner = $this->getMock('Assetic\\Cache\\CacheInterface');

        $this->lifetime = 3600;

        $this->cache = new ExpiringCache($this->inner, $this->lifetime);

    }

    public function testHasExpired()

    {

        $key = 'asdf';

        $expiresKey = 'asdf.expires';

        $thePast = 0;

        $this->inner->expects($this->once())

            ->method('has')

            ->with($key)

            ->will($this->returnValue(true));

        $this->inner->expects($this->once())

            ->method('get')

            ->with($expiresKey)

            ->will($this->returnValue($thePast));

        $this->inner->expects($this->at(2))

            ->method('remove')

            ->with($expiresKey);

        $this->inner->expects($this->at(3))

            ->method('remove')

            ->with($key);

        $this->assertFalse($this->cache->has($key), '->has() returns false if an expired value exists');

    }

    public function testHasNotExpired()

    {

        $key = 'asdf';

        $expiresKey = 'asdf.expires';

        $theFuture = time() * 2;

        $this->inner->expects($this->once())

            ->method('has')

            ->with($key)

            ->will($this->returnValue(true));

        $this->inner->expects($this->once())

            ->method('get')

            ->with($expiresKey)

            ->will($this->returnValue($theFuture));

        $this->assertTrue($this->cache->has($key), '->has() returns true if a value the not expired');

    }

    public function testSetLifetime()

    {

        $key = 'asdf';

        $expiresKey = 'asdf.expires';

        $value = 'qwerty';

        $this->inner->expects($this->at(0))

            ->method('set')

            ->with($expiresKey, $this->greaterThanOrEqual(time() + $this->lifetime));

        $this->inner->expects($this->at(1))

            ->method('set')

            ->with($key, $value);

        $this->cache->set($key, $value);

    }

    public function testRemove()

    {

        $key = 'asdf';

        $expiresKey = 'asdf.expires';

        $this->inner->expects($this->at(0))

            ->method('remove')

            ->with($expiresKey);

        $this->inner->expects($this->at(1))

            ->method('remove')

            ->with($key);

        $this->cache->remove($key);

    }

    public function testGet()

    {

        $this->inner->expects($this->once())

            ->method('get')

            ->with('foo')

            ->will($this->returnValue('bar'));

        $this->assertEquals('bar', $this->cache->get('foo'), '->get() returns the cached value');

    }

}