Add tests for Cache Manager class

tests/Ion/Cache/CacheManagerTest.php

@@ -0,0 +1,40 @@
+<?php
+
+use Aviat\Ion\Friend;
+use Aviat\Ion\Cache\CacheManager;
+
+class CacheManagerText extends AnimeClient_TestCase {
+
+	protected $cachedTime;
+
+	public function __call($name, $args)
+	{
+		return call_user_func_array($name, $args);
+	}
+
+	public function setUp()
+	{
+		parent::setUp();
+		$this->cache = new CacheManager($this->container);
+		$this->friend = new Friend($this->cache);
+	}
+
+	public function testGet()
+	{
+		$this->cachedTime = $this->cache->get($this, 'time');
+		$this->assertEquals($this->cache->get($this, 'time'), $this->cachedTime);
+	}
+
+	public function testGetFresh()
+	{
+		$this->assertNotEquals($this->cache->getFresh($this, 'time'), $this->cachedTime);
+	}
+
+	public function testPurge()
+	{
+		$this->cachedTime = $this->cache->get($this, 'time');
+		$key = $this->friend->generateHashForMethod($this, 'time', []);
+		$this->cache->purge();
+		$this->assertEmpty($this->friend->driver->get($key));
+	}
+}