Add unit tests for signature methods, and a couple for Request.

tests/RequestTest.php

@@ -0,0 +1,36 @@
+<?php
+
+use Mockery as m;
+use GaryJones\OAuth\Request;
+
+class RequestTest extends PHPUnit_Framework_TestCase
+{
+    public function tearDown()
+    {
+        m::close();
+    }
+
+    public function testHttpMethodCanBeNormalized()
+    {
+        $request = new Request('foo', 'bar');
+        $this->assertEquals('FOO', $request->getNormalizedHttpMethod());
+    }
+
+    public function testHttpUrlCanBeNormalized()
+    {
+        $request = new Request('foo', 'bar');
+        $this->assertEquals('http://bar', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'example.com:80');
+        $this->assertEquals('http://example.com', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'example.com:81');
+        $this->assertEquals('http://example.com:81', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'https://example.com');
+        $this->assertEquals('https://example.com', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'https://example.com:443');
+        $this->assertEquals('https://example.com', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'http://example.com/foobar');
+        $this->assertEquals('http://example.com/foobar', $request->getNormalizedHttpUrl());
+        $request = new Request('foo', 'example.org:80/foobar');
+        $this->assertEquals('http://example.org/foobar', $request->getNormalizedHttpUrl());
+    }
+}