Add skeletons for QueryCacher & related test.

Cake/ORM/QueryCacher.php

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+<?php
+/**
+ * PHP Version 5.4
+ *
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         CakePHP(tm) v 3.0.0
+ * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+namespace Cake\ORM;
+
+use Cake\ORM\Query;
+
+/**
+ * Handles caching queries and loading results from the cache.
+ *
+ * Used by Cake\ORM\Query internally.
+ *
+ * @see Cake\ORM\Query::cache() for the public interface.
+ */
+class QueryCacher {
+
+/**
+ * Constructor.
+ *
+ * @param string|Closure $key
+ * @param string|CacheEngine $config
+ */
+	public function __construct($key, $config) {
+		$this->_key = $key;
+		$this->_config = $config;
+	}
+
+/**
+ * Load the cached results from the cache or run the query.
+ *
+ * @param Query $query The query the cache read is for.
+ * @return ResultSet|null Either the cached results or null.
+ */
+	public function fetch(Query $query) {
+	}
+
+}

Cake/Test/TestCase/ORM/QueryCacherTest.php

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+<?php
+/**
+ * PHP Version 5.4
+ *
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         CakePHP(tm) v 3.0.0
+ * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+namespace Cake\Test\TestCase\ORM;
+
+use Cake\TestSuite\TestCase;
+
+/**
+ * Query cacher test
+ */
+class QueryCacherTest extends TestCase {
+
+/**
+ * Setup method
+ *
+ * @return void
+ */
+	public function setUp() {
+		parent::setUp();
+		$this->engine = $this->getMock('Cake\Cache\CacheEngine');
+		Cache::config('queryCache', $this->engine);
+	}
+
+/**
+ * Teardown method
+ *
+ * @return void
+ */
+	public function tearDown() {
+		parent::tearDown();
+		Cache::drop('queryCache');
+	}
+
+/**
+ * Test fetching with a function to generate the key.
+ *
+ * @return void
+ */
+	public function testFetchFunctionKey() {
+	}
+
+/**
+ * Test fetching with a function to generate the key but the function is poop.
+ *
+ * @return void
+ */
+	public function testFetchFunctionKeyNoString() {
+	}
+
+/**
+ * Test fetching with a cache instance.
+ *
+ * @return void
+ */
+	public function testFetchCacheInstance() {
+	}
+
+/**
+ * Test fetching with a cache hit.
+ *
+ * @return void
+ */
+	public function testFetchCacheHit() {
+	}
+
+/**
+ * Test fetching with a cache miss.
+ *
+ * @return void
+ */
+	public function testFetchCacheMiss() {
+	}
+
+}