<?php

namespace yiiunit\extensions\mongodb;

use Yii;
use yii\mongodb\Cache;

class CacheTest extends MongoDbTestCase
{
    /**
     * @var string test cache collection name.
     */
    protected static $cacheCollection = '_test_cache';

    protected function tearDown()
    {
        $this->dropCollection(static::$cacheCollection);
        parent::tearDown();
    }

    /**
     * Creates test cache instance.
     * @return Cache cache instance.
     */
    protected function createCache()
    {
        return Yii::createObject([
            'class' => Cache::className(),
            'db' => $this->getConnection(),
            'cacheCollection' => static::$cacheCollection,
            'gcProbability' => 0,
        ]);
    }

    // Tests:

    public function testSet()
    {
        $cache = $this->createCache();

        $key = 'test_key';
        $value = 'test_value';
        $this->assertTrue($cache->set($key, $value), 'Unable to set value!');
        $this->assertEquals($value, $cache->get($key), 'Unable to set value correctly!');

        $newValue = 'test_new_value';
        $this->assertTrue($cache->set($key, $newValue), 'Unable to update value!');
        $this->assertEquals($newValue, $cache->get($key), 'Unable to update value correctly!');
    }

    public function testAdd()
    {
        $cache = $this->createCache();

        $key = 'test_key';
        $value = 'test_value';
        $this->assertTrue($cache->add($key, $value), 'Unable to add value!');
        $this->assertEquals($value, $cache->get($key), 'Unable to add value correctly!');

        $newValue = 'test_new_value';
        $this->assertTrue($cache->add($key, $newValue), 'Unable to re-add value!');
        $this->assertEquals($value, $cache->get($key), 'Original value is lost!');
    }

    /**
     * @depends testSet
     */
    public function testDelete()
    {
        $cache = $this->createCache();

        $key = 'test_key';
        $value = 'test_value';
        $cache->set($key, $value);

        $this->assertTrue($cache->delete($key), 'Unable to delete key!');
        $this->assertEquals(false, $cache->get($key), 'Value is not deleted!');
    }

    /**
     * @depends testSet
     */
    public function testFlush()
    {
        $cache = $this->createCache();

        $cache->set('key1', 'value1');
        $cache->set('key2', 'value2');

        $this->assertTrue($cache->flush(), 'Unable to flush cache!');

        $collection = $cache->db->getCollection($cache->cacheCollection);
        $rows = $this->findAll($collection);
        $this->assertCount(0, $rows, 'Unable to flush records!');
    }

    /**
     * @depends testSet
     */
    public function testGc()
    {
        $cache = $this->createCache();

        $cache->set('key1', 'value1');
        $cache->set('key2', 'value2');

        $collection = $cache->db->getCollection($cache->cacheCollection);

        list($row) = $this->findAll($collection);
        $collection->update(['_id' => $row['_id']], ['expire' => time() - 10]);

        $cache->gc(true);

        $rows = $this->findAll($collection);
        $this->assertCount(1, $rows, 'Unable to collect garbage!');
    }

    /**
     * @depends testSet
     */
    public function testGetExpired()
    {
        $cache = $this->createCache();

        $key = 'test_key';
        $value = 'test_value';
        $cache->set($key, $value);

        $collection = $cache->db->getCollection($cache->cacheCollection);
        list($row) = $this->findAll($collection);
        $collection->update(['_id' => $row['_id']], ['expire' => time() - 10]);

        $this->assertEquals(false, $cache->get($key), 'Expired key value returned!');
    }
}
