add authentication test

Author: JeremyDunn

tests/FedEx/Tests/AuthenticationTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace FedEx\Tests;
+
+use FedEx\RateService\Request;
+use FedEx\RateService\ComplexType\RateRequest;
+use FedEx\RateService\ComplexType\RateReply;
+use FedEx\Utility\ComplexTypePopulator;
+
+class AuthenticationTest extends TestCase
+{
+    /**
+     * Test for handling an authentication error.
+     */
+    public function testAuthenticationFailed()
+    {
+        $rateRequest = new RateRequest();
+
+        $populator = new ComplexTypePopulator();
+        $populator->populate($rateRequest);
+
+        $expectedResponse = $this->mockResponseSerializer->get('error-authentication-failed.ser');
+
+        $mockSoapClient = $this->getMockFromWsdl(Request::getWsdlPath());
+        $mockSoapClient->method('getRates')->will($this->returnValue($expectedResponse));
+
+        $request = new Request($mockSoapClient);
+
+        $ratesReply = $request->getGetRatesReply($rateRequest);
+
+        $this->assertInstanceOf(RateReply::class, $ratesReply);
+        $this->assertEquals('ERROR', $ratesReply->Notifications[0]->Severity);
+        $this->assertEquals(1000, $ratesReply->Notifications[0]->Code);
+    }
+}