Add abstract cache layer

tests/units/Core/Cache/MemoryCacheTest.php

@@ -0,0 +1,62 @@
+<?php
+
+require_once __DIR__.'/../../Base.php';
+
+use Core\Cache\MemoryCache;
+
+class MemoryCacheTest extends Base
+{
+    public function testKeyNotFound()
+    {
+        $c = new MemoryCache;
+        $this->assertEquals(null, $c->get('mykey'));
+    }
+
+    public function testSetValue()
+    {
+        $c = new MemoryCache;
+        $c->set('mykey', 'myvalue');
+        $this->assertEquals('myvalue', $c->get('mykey'));
+    }
+
+    public function testRemoveValue()
+    {
+        $c = new MemoryCache;
+        $c->set('mykey', 'myvalue');
+        $c->remove('mykey');
+        $this->assertEquals(null, $c->get('mykey'));
+    }
+
+    public function testFlushAll()
+    {
+        $c = new MemoryCache;
+        $c->set('mykey', 'myvalue');
+        $c->flush();
+        $this->assertEquals(null, $c->get('mykey'));
+    }
+
+    public function testProxy()
+    {
+        $c = new MemoryCache;
+
+        $class = $this
+            ->getMockBuilder('stdClass')
+            ->setMethods(array('doSomething'))
+            ->getMock();
+
+        $class
+            ->expects($this->once())
+            ->method('doSomething')
+            ->with(
+                $this->equalTo(1),
+                $this->equalTo(2)
+            )
+            ->will($this->returnValue(3));
+
+        // First call will store the computed value
+        $this->assertEquals(3, $c->proxy($class, 'doSomething', 1, 2));
+
+        // Second call get directly the cached value
+        $this->assertEquals(3, $c->proxy($class, 'doSomething', 1, 2));
+    }
+}