Added an integration test for S3 and CognitoSync to ensure path's are…

… being encoded correctly when signing requests.

tests/Integ/SignatutePathEncodingTest.php

@@ -0,0 +1,50 @@
+<?php
+namespace Aws\Test\Integ;
+
+use Aws\CognitoSync\Exception\CognitoSyncException;
+use Aws\S3\Exception\S3Exception;
+
+class SignaturePathEncodingTest extends \PHPUnit_Framework_TestCase
+{
+    use IntegUtils;
+
+    public function testCognitoSyncRequestSucceedsWithColon()
+    {
+        $client = $this->getSdk()->createClient('CognitoSync');
+        $error = null;
+        try {
+            $client->describeIdentityUsage([
+                'IdentityId'     => 'aaa:bbb',
+                'IdentityPoolId' => 'ccc:ddd',
+            ]);
+        } catch (CognitoSyncException $e) {
+            $error = $e->getAwsErrorCode();
+        }
+
+        $this->assertEquals('ResourceNotFoundException', $error);
+    }
+
+    public function testS3RequestSucceedsWithColon()
+    {
+        $s3 = $this->getSdk()->createClient('S3');
+        $bucket = self::getResourcePrefix() . '-php-sdk-colon-test-bucket';
+
+        $s3->createBucketAsync(['Bucket' => $bucket])->then(function () use ($s3, $bucket) {
+            return $s3->getWaiter('BucketExists', ['Bucket' => $bucket])->promise();
+        })->wait();
+
+        $error = null;
+        try {
+            $s3->getObject([
+                'Bucket' => $bucket,
+                'Key'    => 'aaa:bbb',
+            ]);
+        } catch (S3Exception $e) {
+            $error = $e->getAwsErrorCode();
+        }
+
+        $s3->deleteBucket(['Bucket' => $bucket]);
+
+        $this->assertEquals('NoSuchKey', $error);
+    }
+}