Update Redis cache driver to use PHP-only library, removing the dependence on an extension:

app/config/redis.toml.example

@@ -3,6 +3,7 @@
 ################################################################################
 
 # Host or socket to connect to
+# Socket must be prefixed with 'unix:'
 host = "127.0.0.1"
 
 # Connection port

composer.json

@@ -13,6 +13,7 @@
 		"filp/whoops": "2.0.*",
 		"guzzlehttp/guzzle": "6.*",
 		"monolog/monolog": "1.*",
+		"predis/predis": "1.1.*",
 		"psr/http-message": "~1.0",
 		"psr/log": "~1.0",
 		"robmorgan/phinx": "0.4.*",

src/Aviat/Ion/Cache/Driver/RedisDriver.php

@@ -13,8 +13,11 @@
 namespace Aviat\Ion\Cache\Driver;
 
 use Aviat\Ion\Di\ContainerInterface;
+use Aviat\Ion\Cache\CacheDriverInterface;
 
-class RedisDriver implements \Aviat\Ion\Cache\CacheDriverInterface {
+use Predis\Client;
+
+class RedisDriver implements CacheDriverInterface {
 	
 	/**
 	 * The redis extension class instance
@@ -30,33 +33,20 @@ class RedisDriver implements \Aviat\Ion\Cache\CacheDriverInterface {
 		$config = $container->get('config');
 		$redisConfig = $config->get('redis');
 
-		$this->redis = new \Redis();
-		
-		(array_key_exists('port', $redisConfig))
-			? $this->redis->pconnect($redisConfig['host'], $redisConfig['port'])
-			: $this->redis->pconnect($redisConfig['host']);
-		
-		// If there is a password, authorize
-		if (array_key_exists('password', $redisConfig))
+		if (array_key_exists('password', $redisConfig) && $redisConfig['password'] === '')
 		{
-			$this->redis->auth($redisConfig['password']);
+			unset($redisConfig['password']);
 		}
 		
-		// If there is a database selected, connect to the specified database
-		if (array_key_exists('database', $redisConfig))
-		{
-			$this->redis->select($redisConfig['database']);
-		}
-		
-		$this->redis->setOption(\Redis::OPT_SERIALIZER, \Redis::SERIALIZER_PHP);
+		$this->redis = new Client($redisConfig);
 	}
 
 	/**
-	 * Destructor to disconnect from redis
+	 * Disconnect from redis
 	 */
 	public function __destruct()
 	{
-		$this->redis->close();
+		$this->redis = null;
 	}
 	
 	/**
@@ -67,7 +57,7 @@ class RedisDriver implements \Aviat\Ion\Cache\CacheDriverInterface {
 	 */
 	public function get($key)
 	{
-		return $this->redis->get($key);
+		return unserialize($this->redis->get($key));
 	}
 	
 	/**
@@ -79,7 +69,7 @@ class RedisDriver implements \Aviat\Ion\Cache\CacheDriverInterface {
 	 */
 	public function set($key, $value)
 	{
-		$this->redis->set($key, $value);
+		$this->redis->set($key, serialize($value));
 		return $this;
 	}
 	

tests/Ion/Cache/Driver/CacheDriverBase.php

@@ -18,7 +18,9 @@ trait CacheDriverBase {
 	public function testDriverGetSet()
 	{
 		$this->driver->set('foo', $this->foo);
+		$this->driver->set('bar', 'baz');
 		$this->assertEquals($this->driver->get('foo'), $this->foo);
+		$this->assertEquals($this->driver->get('bar'), 'baz');
 	}
 	
 	public function testInvalidate()

tests/Ion/Cache/Driver/RedisDriver2Test.php

@@ -15,12 +15,6 @@ class CacheRedisDriverTestTwo extends AnimeClient_TestCase {
 	{
 		parent::setUp();
 
-		if ( ! class_exists('Redis'))
-		{
-			$this->markTestSkipped('Redis extension not installed');
-		}
-		else
-		{
 		// Setup config with port and password
 		$container = new Container();
 		$container->set('config', new Config([
@@ -33,7 +27,6 @@ class CacheRedisDriverTestTwo extends AnimeClient_TestCase {
 		]));
 		$this->driver = new RedisDriver($container);
 	}
-	}
 
 	public function tearDown()
 	{

tests/Ion/Cache/Driver/RedisDriverTest.php

@@ -13,15 +13,8 @@ class CacheRedisDriverTest extends AnimeClient_TestCase {
 	{
 		parent::setUp();
 
-		if ( ! class_exists('Redis'))
-		{
-			$this->markTestSkipped('Redis extension not installed');
-		}
-		else
-		{
 		$this->driver = new RedisDriver($this->container);
 	}
-	}
 
 	public function tearDown()
 	{