create a Test folder for each pattern

Creational/FactoryMethod/Tests/FactoryMethodTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod\Tests;
+
+use DesignPatterns\Creational\FactoryMethod\FactoryMethod;
+use DesignPatterns\Creational\FactoryMethod\GermanFactory;
+use DesignPatterns\Creational\FactoryMethod\ItalianFactory;
+
+/**
+ * FactoryMethodTest tests the factory method pattern
+ */
+class FactoryMethodTest extends \PHPUnit_Framework_TestCase
+{
+
+    protected $type = array(
+        FactoryMethod::CHEAP,
+        FactoryMethod::FAST
+    );
+
+    public function getShop()
+    {
+        return array(
+            array(new GermanFactory()),
+            array(new ItalianFactory())
+        );
+    }
+
+    /**
+     * @dataProvider getShop
+     */
+    public function testCreation(FactoryMethod $shop)
+    {
+        // this test method acts as a client for the factory. We don't care
+        // about the factory, all we know is it can produce vehicle
+        foreach ($this->type as $oneType) {
+            $vehicle = $shop->create($oneType);
+            $this->assertInstanceOf('DesignPatterns\Creational\FactoryMethod\VehicleInterface', $vehicle);
+        }
+    }
+
+    /**
+     * @dataProvider getShop
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage spaceship is not a valid vehicle
+     */
+    public function testUnknownType(FactoryMethod $shop)
+    {
+        $shop->create('spaceship');
+    }
+}