diff --git a/server/__tests__/__lib__/Mock.php b/server/__tests__/__lib__/Mock.php
new file mode 100644
index 00000000..1e8318a9
--- /dev/null
+++ b/server/__tests__/__lib__/Mock.php
@@ -0,0 +1,75 @@
+<?php
+
+class Stub {
+    private $function;
+    private $timesCalled = 0;
+    private $lastArgs = null;
+
+    public function __construct($function = null) {
+         $this->function = ($function === null) ? function (){} : $function;
+    }
+
+    public function __invoke() {
+        $this->timesCalled++;
+        $this->lastArgs = func_get_args();
+
+        return call_user_func_array($this->function, func_get_args());
+    }
+
+    public function returns($arg) {
+        $this->function = function () use ($arg) {
+            return $arg;
+        };
+
+        return $this;
+    }
+
+    public function hasBeenCalled() {
+        return !!$this->timesCalled;
+    }
+
+    public function reset() {
+        $this->timesCalled = 0;
+        $this->lastArgs = null;
+    }
+
+    public function hasBeenCalledWithArgs() {
+        $argumentsMatchAssertion = serialize(func_get_args()) === serialize($this->lastArgs);
+
+        return $this->timesCalled && $argumentsMatchAssertion;
+    }
+}
+
+class Mock {
+    public static function stub() {
+        return new Stub;
+    }
+
+    public function __construct($arguments = array()) {
+        if (!empty($arguments)) {
+            foreach ($arguments as $property => $argument) {
+                if ($argument instanceOf Closure) {
+                    $this->{$property} = self::stub($argument);
+                } else {
+                    $this->{$property} = $argument;
+                }
+            }
+        }
+    }
+
+    public function __set($key, $value){
+        if ($value instanceOf Closure) {
+            $this->{$key} = self::stub($value);
+        } else {
+            $this->{$key} = $value;
+        }
+    }
+
+    public function __call($method, $arguments) {
+        if (isset($this->{$method}) && is_callable($this->{$method})) {
+            return call_user_func_array($this->{$method}, $arguments);
+        } else {
+            throw new Exception("Fatal error: Call to undefined method stdObject::{$method}()");
+        }
+    }
+}
diff --git a/server/__tests__/__mocks__/SlimMock.php b/server/__tests__/__mocks__/SlimMock.php
new file mode 100644
index 00000000..b9bac85b
--- /dev/null
+++ b/server/__tests__/__mocks__/SlimMock.php
@@ -0,0 +1,30 @@
+<?php
+namespace Slim {
+    class Response extends \Mock {
+        protected static $instance;
+        public function __construct() {}
+
+        public static function getInstance() {
+            if (self::$instance === null ) {
+                self::$instance = new \Mock();
+                self::$instance->setBody = \Mock::stub();
+            }
+
+            return self::$instance;
+        }
+    }
+
+    class Slim extends \Mock {
+        protected static $instance;
+        public function __construct() {}
+
+        public static function getInstance() {
+            if (self::$instance === null ) {
+                self::$instance = new Slim();
+                self::$instance->response = \Mock::stub()->returns(Response::getInstance());
+            }
+
+            return self::$instance;
+        }
+    }
+}
diff --git a/server/__tests__/__models__/ResponseTest.php b/server/__tests__/__models__/ResponseTest.php
new file mode 100644
index 00000000..b5c71e49
--- /dev/null
+++ b/server/__tests__/__models__/ResponseTest.php
@@ -0,0 +1,74 @@
+<?php
+include_once '__tests__/__lib__/Mock.php';
+include_once '__tests__/__mocks__/SlimMock.php';
+include_once 'models/Response.php';
+
+//use \Mockery as Mockery;
+
+class ResponseTest extends PHPUnit_Framework_TestCase {
+    public function testErrorResponseFormat() {
+        //Mock data
+        $mockErrorValue = 'MOCK_ERROR_VALUE';
+        $mockData = array('example' => true);
+        $expectedArgument = json_encode(array(
+            'status' => 'fail',
+            'message' => $mockErrorValue,
+            'data' => $mockData
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondError($mockErrorValue, $mockData);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testErrorResponseFormatWithoutData() {
+        //Mock data
+        $mockErrorValue = 'MOCK_ERROR_VALUE';
+        $expectedArgument = json_encode(array(
+            'status' => 'fail',
+            'message' => $mockErrorValue,
+            'data' => null
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondError($mockErrorValue);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testSuccessFormat() {
+        //Mock data
+        $mockData = array('example' => true);
+        $expectedArgument = json_encode(array(
+            'status' => 'success',
+            'data' => $mockData
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondSuccess($mockData);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testSuccessFormatWithoutData() {
+        //Mock data
+        $expectedArgument = json_encode(array(
+            'status' => 'success',
+            'data' => null
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondSuccess();
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+}
diff --git a/server/__tests__/lib/Mock.php b/server/__tests__/lib/Mock.php
new file mode 100644
index 00000000..1e8318a9
--- /dev/null
+++ b/server/__tests__/lib/Mock.php
@@ -0,0 +1,75 @@
+<?php
+
+class Stub {
+    private $function;
+    private $timesCalled = 0;
+    private $lastArgs = null;
+
+    public function __construct($function = null) {
+         $this->function = ($function === null) ? function (){} : $function;
+    }
+
+    public function __invoke() {
+        $this->timesCalled++;
+        $this->lastArgs = func_get_args();
+
+        return call_user_func_array($this->function, func_get_args());
+    }
+
+    public function returns($arg) {
+        $this->function = function () use ($arg) {
+            return $arg;
+        };
+
+        return $this;
+    }
+
+    public function hasBeenCalled() {
+        return !!$this->timesCalled;
+    }
+
+    public function reset() {
+        $this->timesCalled = 0;
+        $this->lastArgs = null;
+    }
+
+    public function hasBeenCalledWithArgs() {
+        $argumentsMatchAssertion = serialize(func_get_args()) === serialize($this->lastArgs);
+
+        return $this->timesCalled && $argumentsMatchAssertion;
+    }
+}
+
+class Mock {
+    public static function stub() {
+        return new Stub;
+    }
+
+    public function __construct($arguments = array()) {
+        if (!empty($arguments)) {
+            foreach ($arguments as $property => $argument) {
+                if ($argument instanceOf Closure) {
+                    $this->{$property} = self::stub($argument);
+                } else {
+                    $this->{$property} = $argument;
+                }
+            }
+        }
+    }
+
+    public function __set($key, $value){
+        if ($value instanceOf Closure) {
+            $this->{$key} = self::stub($value);
+        } else {
+            $this->{$key} = $value;
+        }
+    }
+
+    public function __call($method, $arguments) {
+        if (isset($this->{$method}) && is_callable($this->{$method})) {
+            return call_user_func_array($this->{$method}, $arguments);
+        } else {
+            throw new Exception("Fatal error: Call to undefined method stdObject::{$method}()");
+        }
+    }
+}
diff --git a/server/__tests__/models/ResponseTest.php b/server/__tests__/models/ResponseTest.php
new file mode 100644
index 00000000..b5c71e49
--- /dev/null
+++ b/server/__tests__/models/ResponseTest.php
@@ -0,0 +1,74 @@
+<?php
+include_once '__tests__/__lib__/Mock.php';
+include_once '__tests__/__mocks__/SlimMock.php';
+include_once 'models/Response.php';
+
+//use \Mockery as Mockery;
+
+class ResponseTest extends PHPUnit_Framework_TestCase {
+    public function testErrorResponseFormat() {
+        //Mock data
+        $mockErrorValue = 'MOCK_ERROR_VALUE';
+        $mockData = array('example' => true);
+        $expectedArgument = json_encode(array(
+            'status' => 'fail',
+            'message' => $mockErrorValue,
+            'data' => $mockData
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondError($mockErrorValue, $mockData);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testErrorResponseFormatWithoutData() {
+        //Mock data
+        $mockErrorValue = 'MOCK_ERROR_VALUE';
+        $expectedArgument = json_encode(array(
+            'status' => 'fail',
+            'message' => $mockErrorValue,
+            'data' => null
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondError($mockErrorValue);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testSuccessFormat() {
+        //Mock data
+        $mockData = array('example' => true);
+        $expectedArgument = json_encode(array(
+            'status' => 'success',
+            'data' => $mockData
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondSuccess($mockData);
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+
+    public function testSuccessFormatWithoutData() {
+        //Mock data
+        $expectedArgument = json_encode(array(
+            'status' => 'success',
+            'data' => null
+        ));
+        $responseInstance = \Slim\Slim::getInstance()->response();
+
+        //Execute Response
+        Response::respondSuccess();
+
+        //Should have been called with expected format
+        $this->assertTrue($responseInstance->setBody->hasBeenCalledWithArgs($expectedArgument));
+    }
+}