create a Test folder for each pattern

Behavioral/Memento/Tests/MementoTest.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace DesignPatterns\Behavioral\Memento\Tests;
+
+use DesignPatterns\Behavioral\Memento\Originator;
+
+/**
+ * MementoTest tests the memento pattern
+ */
+class MementoTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function testStringState()
+    {
+        $originator = new Originator();
+        $originator->setState("State1");
+
+        $this->assertAttributeEquals("State1", "state", $originator);
+
+        $originator->setState("State2");
+
+        $this->assertAttributeEquals("State2", "state", $originator);
+
+        $savedState = $originator->saveToMemento();
+
+        $this->assertAttributeEquals("State2", "state", $savedState);
+
+        $originator->setState("State3");
+
+        $this->assertAttributeEquals("State3", "state", $originator);
+
+        $originator->restoreFromMemento($savedState);
+
+        $this->assertAttributeEquals("State2", "state", $originator);
+    }
+
+    public function testObjectState()
+    {
+        $originator = new Originator();
+
+        $foo       = new \stdClass();
+        $foo->data = "foo";
+
+        $originator->setState($foo);
+
+        $this->assertAttributeEquals($foo, "state", $originator);
+
+        $savedState = $originator->saveToMemento();
+
+        $this->assertAttributeEquals($foo, "state", $savedState);
+
+        $bar       = new \stdClass();
+        $bar->data = "bar";
+
+        $originator->setState($bar);
+
+        $this->assertAttributeEquals($bar, "state", $originator);
+
+        $originator->restoreFromMemento($savedState);
+
+        $this->assertAttributeEquals($foo, "state", $originator);
+
+        $foo->data = null;
+
+        $this->assertAttributeNotEquals($foo, "state", $savedState);
+
+        $this->assertAttributeNotEquals($foo, "state", $originator);
+    }
+}