--- a/lib/Protobuf-PHP/tests/Protobuf.Codec.Xml.spec.php
+++ b/lib/Protobuf-PHP/tests/Protobuf.Codec.Xml.spec.php
@@ -1,1 +1,178 @@
+<?php
 
+require_once __DIR__ . '/../library/DrSlump/Protobuf.php';
+
+use \DrSlump\Protobuf;
+
+Protobuf::autoload();
+
+include_once __DIR__ . '/protos/simple.php';
+include_once __DIR__ . '/protos/repeated.php';
+include_once __DIR__ . '/protos/addressbook.php';
+
+describe "XML Codec"
+
+    before
+        Protobuf::setDefaultCodec(new ProtoBuf\Codec\Xml);
+    end
+
+    describe "serialize"
+
+        it "a simple message"
+            $simple = new Tests\Simple();
+            $simple->string = 'FOO';
+            $simple->int32 = 1000;
+            $xml = Protobuf::encode($simple);
+            $sxe = simplexml_load_string($xml);
+            $sxe->string should eq "FOO";
+            $sxe->int32 should eq 1000;
+        end.
+
+         it. "a message with repeated fields"
+
+             $repeated = new \Tests\Repeated();
+             $repeated->addString('one');
+             $repeated->addString('two');
+             $repeated->addString('three');
+             $xml = Protobuf::encode($repeated);
+             $xml = simplexml_load_string($xml);
+             $xml->string[0] should eq 'one';
+             $xml->string[1] should eq 'two';
+             $xml->string[2] should eq 'three';
+
+             $repeated = new Tests\Repeated();
+             $repeated->addInt(1);
+             $repeated->addInt(2);
+             $repeated->addInt(3);
+             $xml = Protobuf::encode($repeated);
+             $xml = simplexml_load_string($xml);
+             $xml->int[0] should eq 1;
+             $xml->int[1] should eq 2;
+             $xml->int[2] should eq 3;
+
+             $repeated = new Tests\Repeated();
+             $nested = new Tests\Repeated\Nested();
+             $nested->setId(1);
+             $repeated->addNested($nested);
+             $nested = new Tests\Repeated\Nested();
+             $nested->setId(2);
+             $repeated->addNested($nested);
+             $nested = new Tests\Repeated\Nested();
+             $nested->setId(3);
+             $repeated->addNested($nested);
+             $xml = Protobuf::encode($repeated);
+             $xml = simplexml_load_string($xml);
+             $xml->nested[0]->id should eq 1;
+             $xml->nested[1]->id should eq 2;
+             $xml->nested[2]->id should eq 3;
+         end.
+
+        it. "a complex message"
+
+            $book = new Tests\AddressBook();
+            $person = new Tests\Person();
+            $person->name = 'John Doe';
+            $person->id = 2051;
+            $person->email = 'john.doe@gmail.com';
+            $phone = new Tests\Person\PhoneNumber;
+            $phone->number = '1231231212';
+            $phone->type = Tests\Person\PhoneType::HOME;
+            $person->addPhone($phone);
+            $phone = new Tests\Person\PhoneNumber;
+            $phone->number = '55512321312';
+            $phone->type = Tests\Person\PhoneType::MOBILE;
+            $person->addPhone($phone);
+            $book->addPerson($person);
+
+            $person = new Tests\Person();
+            $person->name = 'Iván Montes';
+            $person->id = 23;
+            $person->email = 'drslump@pollinimini.net';
+            $phone = new Tests\Person\PhoneNumber;
+            $phone->number = '3493123123';
+            $phone->type = Tests\Person\PhoneType::WORK;
+            $person->addPhone($phone);
+            $book->addPerson($person);
+
+            $xml = Protobuf::encode($book);
+            $xml = simplexml_load_string($xml);
+
+            $xml->person[0]->name should eq "John Doe";
+            $xml->person[0]->phone[1]->number should eq "55512321312";
+            $xml->person[1]->id should eq 23;
+            $xml->person[1]->phone[0]->type should eq 2;
+        end.
+    end;
+
+    describe "unserialize"
+
+        it "should unserialize a simple message"
+            $xml = new SimpleXmlElement('<root></root>');
+            $xml->addChild('string', 'FOO');
+            $xml->addChild('int32', 1000);
+
+            $simple = Protobuf::decode('Tests\Simple', $xml);
+            $simple should be instanceof 'Tests\Simple';
+            $simple->string should equal 'FOO';
+            $simple->int32 should equal 1000;
+        end.
+
+        it "a message with repeated fields"
+
+            $xml = new SimpleXMLElement('<root></root>');
+            $xml->addChild('string', 'one');
+            $xml->addChild('string', 'two');
+            $xml->addChild('string', 'three');
+
+            $repeated = Protobuf::decode('Tests\Repeated', $xml);
+            $repeated->getString() should eq array('one', 'two', 'three');
+
+            $xml = new SimpleXMLElement('<root></root>');
+            $xml->addChild('int', 1);
+            $xml->addChild('int', 2);
+            $xml->addChild('int', 3);
+
+            $repeated = Protobuf::decode('Tests\Repeated', $xml);
+            $repeated should be instanceof 'Tests\Repeated';
+            $repeated->getInt() should eq array(1,2,3);
+
+            $xml = new SimpleXMLElement('<root></root>');
+            $xml->addChild('nested')->addChild('id', 1);
+            $xml->addChild('nested')->addChild('id', 2);
+            $xml->addChild('nested')->addChild('id', 3);
+
+            $repeated = Protobuf::decode('Tests\Repeated', $xml);
+            $repeated should be instanceof 'Tests\Repeated';
+            foreach ($repeated->getNested() as $i=>$nested) {
+                $nested->getId() should eq ($i+1);
+            }
+        end.
+
+        it "a complex message"
+
+            $xml = new SimpleXMLElement('<root></root>');
+            $p = $xml->addChild('person');
+                $p->addChild('name', 'John Doe');
+                $p->addChild('id', 2051);
+                $p->addChild('email', 'john.doe@gmail.com');
+                $p = $p->addChild('phone');
+                    $p->addChild('number', '1231231212');
+                    $p->addChild('type', 1);
+            $p = $xml->addChild('person');
+                $p->addChild('name', 'Iván Montes');
+                $p->addChild('id', 23);
+                $p->addChild('email', 'drslump@pollinimini.net');
+                $p = $p->addChild('phone');
+                    $p->addChild('number', '3493123123');
+                    $p->addChild('type', 2);
+
+            $complex = Protobuf::decode('Tests\AddressBook', $xml->asXML());
+            count($complex->person) should eq 2;
+            $complex->getPerson(0)->name should eq 'John Doe';
+            $complex->getPerson(1)->name should eq 'Iván Montes';
+            $complex->getPerson(1)->getPhone(0)->number should eq '3493123123';
+        end.
+
+    end;
+end;
+