diff --git a/api/run-tests.sh b/api/run-tests.sh
new file mode 100755
index 00000000..487b82e1
--- /dev/null
+++ b/api/run-tests.sh
@@ -0,0 +1,2 @@
+phpunit --colors tests/models
+phpunit --colors tests/controllers
\ No newline at end of file
diff --git a/api/tests/__lib__/Mock.php b/api/tests/__lib__/Mock.php
index 91acb362..f15e86c0 100644
--- a/api/tests/__lib__/Mock.php
+++ b/api/tests/__lib__/Mock.php
@@ -2,8 +2,8 @@
 
 class Stub {
     private $function;
-    private $timesCalled = 0;
-    private $lastArgs = null;
+    public $timesCalled = 0;
+    public $lastArgs = null;
 
     public function __construct($function = null) {
          $this->function = ($function === null) ? function (){} : $function;
@@ -48,6 +48,24 @@ class Mock {
         return new Stub;
     }
 
+    public static function setStatics($statics) {
+        foreach ($statics as $key => $static) {
+            static::$functionList[$key] = $static;
+        }
+    }
+
+    public static function __callStatic($key, $arguments) {
+        if (static::$functionList[$key]) {
+            $function =  static::$functionList[$key];
+
+            return call_user_func_array($function, $arguments);
+        }
+    }
+
+    public static function get($key) {
+        return static::$functionList[$key];
+    }
+
     public function __construct($arguments = array()) {
         if (!empty($arguments)) {
             foreach ($arguments as $property => $argument) {
@@ -71,7 +89,7 @@ class Mock {
     public function __call($method, $arguments) {
         if (isset($this->{$method}) && is_callable($this->{$method})) {
             return call_user_func_array($this->{$method}, $arguments);
-        } else {
+        } else if (!self::__callStatic($method, $arguments)) {
             throw new Exception("Fatal error: Call to undefined method stdObject::{$method}()");
         }
     }
diff --git a/api/tests/__mocks__/ControllerMock.php b/api/tests/__mocks__/ControllerMock.php
new file mode 100644
index 00000000..6f9376c5
--- /dev/null
+++ b/api/tests/__mocks__/ControllerMock.php
@@ -0,0 +1,12 @@
+<?php
+
+class Controller extends \Mock {
+    public static $functionList = array();
+
+    public static function initStubs() {
+        parent::setStatics(array(
+            'request' => parent::stub()->returns('mockRequestValue'),
+            'checkUserLogged' => parent::stub()->returns(true)
+        ));
+    }
+}
\ No newline at end of file
diff --git a/api/tests/__mocks__/RedBeanMock.php b/api/tests/__mocks__/RedBeanMock.php
index a069bc8c..3a9872b5 100644
--- a/api/tests/__mocks__/RedBeanMock.php
+++ b/api/tests/__mocks__/RedBeanMock.php
@@ -1,32 +1,14 @@
 <?php
 namespace RedBeanPHP {
     class Facade extends \Mock {
-        private static $functionList = array();
+        public static $functionList = array();
 
-        public static function initStubs(){
-            self::$functionList = array(
+        public static function initStubs() {
+            self::setStatics(array(
                 'trash' => parent::stub(),
                 'store' => parent::stub(),
                 'dispense' => parent::stub()->returns(array())
-            );
-        }
-
-        public static function setStatics($statics) {
-            foreach ($statics as $key => $static) {
-                self::$functionList[$key] = $static;
-            }
-        }
-
-        public static function __callStatic($key, $arguments) {
-            if (self::$functionList[$key]) {
-                $function =  self::$functionList[$key];
-
-                return call_user_func_array($function, $arguments);
-            }
-        }
-
-        public static function get($key) {
-            return self::$functionList[$key];
+            ));
         }
     }
 }
diff --git a/api/tests/__mocks__/ResponseMock.php b/api/tests/__mocks__/ResponseMock.php
new file mode 100644
index 00000000..568dbcdf
--- /dev/null
+++ b/api/tests/__mocks__/ResponseMock.php
@@ -0,0 +1,12 @@
+<?php
+
+class Response extends \Mock {
+    public static $functionList = array();
+
+    public static function initStubs() {
+        parent::setStatics(array(
+            'respondSuccess' => parent::stub(),
+            'respondError' => parent::stub()
+        ));
+    }
+}
\ No newline at end of file
diff --git a/api/tests/__mocks__/SessionMock.php b/api/tests/__mocks__/SessionMock.php
new file mode 100644
index 00000000..de102462
--- /dev/null
+++ b/api/tests/__mocks__/SessionMock.php
@@ -0,0 +1,27 @@
+<?php
+
+class Session extends \Mock {
+    public static $functionList = array();
+
+    public static function initStubs() {
+        self::setStatics(array(
+            'getInstance' => parent::stub()->returns(self::getInstanceMock()),
+        ));
+    }
+
+    public static function mockInstanceFunction($functionName, $functionMock) {
+        self::getInstance()->{$functionName} = $functionMock;
+    }
+
+    private static function getInstanceMock() {
+        return new \Mock(array(
+            'initSession' => parent::stub(),
+            'closeSession' => parent::stub(),
+            'createSession' => parent::stub(),
+            'getToken' => parent::stub()->returns('TEST_TOKEN'),
+            'sessionExists' => parent::stub()->returns(false),
+            'checkAuthentication' => parent::stub()->returns(true),
+            'isLoggedWithId' => parent::stub()->returns(true),
+        ));
+    }
+}
\ No newline at end of file
diff --git a/api/tests/__mocks__/SlimMock.php b/api/tests/__mocks__/SlimMock.php
index c7837f96..740bb4e8 100644
--- a/api/tests/__mocks__/SlimMock.php
+++ b/api/tests/__mocks__/SlimMock.php
@@ -2,10 +2,11 @@
 namespace Slim {
     class Response extends \Mock {
         protected static $instance;
+
         public function __construct() {}
 
         public static function getInstance() {
-            if (self::$instance === null ) {
+            if (self::$instance === null) {
                 self::$instance = new \Mock();
                 self::$instance->setBody = \Mock::stub();
                 self::$instance->finalize = \Mock::stub();
@@ -17,10 +18,12 @@ namespace Slim {
 
     class Slim extends \Mock {
         protected static $instance;
-        public function __construct() {}
+
+        public function __construct() {
+        }
 
         public static function getInstance() {
-            if (self::$instance === null ) {
+            if (self::$instance === null) {
                 self::$instance = new Slim();
                 self::$instance->response = \Mock::stub()->returns(Response::getInstance());
             }
@@ -28,4 +31,4 @@ namespace Slim {
             return self::$instance;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/api/tests/__mocks__/UserMock.php b/api/tests/__mocks__/UserMock.php
new file mode 100644
index 00000000..b4447c85
--- /dev/null
+++ b/api/tests/__mocks__/UserMock.php
@@ -0,0 +1,21 @@
+<?php
+class User extends \Mock {
+    public static $functionList = array();
+
+    public static function initStubs() {
+        parent::setStatics(array(
+            'authenticate' => parent::stub()->returns(self::getUserInstanceMock()),
+        ));
+    }
+
+    private static function getUserInstanceMock() {
+        $mockUserInstance = new \stdClass();
+
+        $mockUserInstance->id = 'MOCK_ID';
+        $mockUserInstance->email = 'MOCK_EMAIL';
+        $mockUserInstance->password = 'MOCK_PASSWORD';
+        $mockUserInstance->admin = 'MOCK_ADMIN_VALUE';
+
+        return $mockUserInstance;
+    }
+}
\ No newline at end of file
diff --git a/api/tests/controllers/.gitkeep b/api/tests/controllers/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/api/tests/controllers/user/loginTest.php b/api/tests/controllers/user/loginTest.php
new file mode 100644
index 00000000..46f56f60
--- /dev/null
+++ b/api/tests/controllers/user/loginTest.php
@@ -0,0 +1,55 @@
+<?php
+// MOCKS
+include_once 'tests/__lib__/Mock.php';
+include_once 'tests/__mocks__/ResponseMock.php';
+include_once 'tests/__mocks__/ControllerMock.php';
+include_once 'tests/__mocks__/SessionMock.php';
+include_once 'tests/__mocks__/UserMock.php';
+include_once 'models/ERRORS.php';
+
+include_once 'controllers/user/login.php';
+
+class LoginControllerTest extends PHPUnit_Framework_TestCase {
+    private $loginController;
+
+    protected function setUp() {
+        Session::initStubs();
+        Controller::initStubs();
+        User::initStubs();
+        Response::initStubs();
+
+        $this->loginController = new LoginController();
+    }
+
+    public function testShouldRespondErrorIfAlreadyLoggedIn() {
+        Session::mockInstanceFunction('sessionExists', \Mock::stub()->returns(true));
+
+        $this->loginController->handler();
+
+        $this->assertTrue(Response::get('respondError')->hasBeenCalledWithArgs(ERRORS::SESSION_EXISTS));
+    }
+
+    public function testShouldCreateSessionAndRespondSuccessIfCredentialsAreValid() {
+        Session::mockInstanceFunction('sessionExists', \Mock::stub()->returns(false));
+
+        $this->loginController->handler();
+
+        $this->assertTrue(Session::getInstance()->createSession->hasBeenCalledWithArgs('MOCK_ID'));
+        $this->assertTrue(Response::get('respondSuccess')->hasBeenCalledWithArgs(array(
+            'userId' => 'MOCK_ID',
+            'userEmail' => 'MOCK_EMAIL',
+            'userIsAdmin' => 'MOCK_ADMIN_VALUE',
+            'token' => 'TEST_TOKEN'
+        )));
+    }
+
+    public function testShouldRespondErrorIfCredentialsAreInvalid() {
+        User::setStatics(array(
+            'authenticate' => \Mock::stub()->returns(null)
+        ));
+
+        $this->loginController->handler();
+
+        $this->assertTrue(Response::get('respondError')->hasBeenCalledWithArgs(ERRORS::INVALID_CREDENTIALS));
+    }
+}