create a Test folder for each pattern

Creational/SimpleFactory/Tests/SimpleFactoryTest.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace DesignPatterns\Creational\SimpleFactory\Tests;
+
+use DesignPatterns\Creational\SimpleFactory\ConcreteFactory;
+
+/**
+ * SimpleFactoryTest tests the Simple Factory pattern
+ */
+class SimpleFactoryTest extends \PHPUnit_Framework_TestCase
+{
+
+    protected $factory;
+
+    protected function setUp()
+    {
+        $this->factory = new ConcreteFactory();
+    }
+
+    public function getType()
+    {
+        return array(
+            array('bicycle'),
+            array('other')
+        );
+    }
+
+    /**
+     * @dataProvider getType
+     */
+    public function testCreation($type)
+    {
+        $obj = $this->factory->createVehicle($type);
+        $this->assertInstanceOf('DesignPatterns\Creational\SimpleFactory\VehicleInterface', $obj);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testBadType()
+    {
+        $this->factory->createVehicle('car');
+    }
+}