create a Test folder for each pattern

Structural/Facade/Tests/FacadeTest.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace DesignPatterns\Structural\Facade\Tests;
+
+use DesignPatterns\Structural\Facade\Facade as Computer;
+
+/**
+ * FacadeTest shows example of facades
+ */
+class FacadeTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function getComputer()
+    {
+        $bios = $this->getMockBuilder('DesignPatterns\Structural\Facade\BiosInterface')
+                ->setMethods(array('launch', 'execute', 'waitForKeyPress'))
+                ->disableAutoload()
+                ->getMock();
+        $operatingSys = $this->getMockBuilder('DesignPatterns\Structural\Facade\OsInterface')
+                ->setMethods(array('getName'))
+                ->disableAutoload()
+                ->getMock();
+        $bios->expects($this->once())
+                ->method('launch')
+                ->with($operatingSys);
+        $operatingSys
+                ->expects($this->once())
+                ->method('getName')
+                ->will($this->returnValue('Linux'));
+
+        $facade = new Computer($bios, $operatingSys);
+        return array(array($facade, $operatingSys));
+    }
+
+    /**
+     * @dataProvider getComputer
+     */
+    public function testComputerOn(Computer $facade, $os)
+    {
+        // interface is simpler :
+        $facade->turnOn();
+        // but I can access to lower component
+        $this->assertEquals('Linux', $os->getName());
+    }
+}