Bring back StaticStringy as a __callStatic wrapper

tests/StaticStringyTest.php

@@ -0,0 +1,56 @@
+<?php
+
+require __DIR__ . '/../src/StaticStringy.php';
+
+use Stringy\StaticStringy as S;
+
+class StaticStringyTestCase extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException BadMethodCallException
+     */
+    public function testBadMethodCall()
+    {
+        $result = S::invalidMethod('foo');
+    }
+
+    public function testEmptyArgsInvocation()
+    {
+        $result = S::toLowerCase();
+        $this->assertEquals('', (string) $result);
+    }
+
+    public function testPartialArgsInvocation()
+    {
+        $result = S::slice('foobar', 0, 3);
+        $this->assertEquals('foo', (string) $result);
+    }
+
+    public function testFullArgsInvocation()
+    {
+        $result = S::slice('fòôbàř', 0, 3, 'UTF-8');
+        $this->assertEquals('fòô', (string) $result);
+    }
+
+    /**
+     * Use reflection to ensure that all argument numbers are correct. Each
+     * static method should accept 2 more arguments than their Stringy
+     * equivalent.
+     */
+    public function testArgumentNumbers()
+    {
+        $staticStringyClass = new ReflectionClass('Stringy\StaticStringy');
+        $stringyClass = new ReflectionClass('Stringy\Stringy');
+
+        // getStaticPropertyValue can't access protected properties
+        $properties = $staticStringyClass->getStaticProperties();
+
+        foreach ($properties['methodArgs'] as $method => $expected) {
+            $num = $stringyClass->getMethod($method)
+                ->getNumberOfParameters() + 2;
+
+            $this->assertEquals($expected, $num,
+                'Invalid num args for ' . $method);
+        }
+    }
+}