Add tests

phpunit.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit bootstrap="tests/bootstrap.php" colors="true">
+    <testsuites>
+        <testsuite name="Hello World Test Suite">
+            <directory>./tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>./</directory>
+            <exclude>
+                <directory>./tests</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+</phpunit>

tests/HelloWorldTest.php

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * Class HelloWorldTest.
+ */
+class HelloWorldTest extends PHPUnit_Framework_TestCase
+{
+    public function setUp()
+    {
+    }
+
+    public function testHelloWorld()
+    {
+        $this->assertEquals('Hello World', 'Hello World');
+    }
+}

tests/bootstrap.php

@@ -0,0 +1,10 @@
+<?php
+
+function loader($class)
+{
+    $file = $class.'.php';
+    if (file_exists($file)) {
+        require $file;
+    }
+}
+spl_autoload_register('loader');