public function testAddProperties()
 {
     $request = $this->getMockBuilder('\\Zumba\\VanillaJsConnect\\Request')->disableOriginalConstructor()->getMock();
     $user = $this->getMockBuilder('\\Zumba\\VanillaJsConnect\\User')->disableOriginalConstructor()->getMock();
     $config = $this->getMockBuilder('\\Zumba\\VanillaJsConnect\\Config')->disableOriginalConstructor()->getMock();
     $user->method('toArray')->will($this->returnValue(['name' => 'Foo', 'photourl' => 'imgur']));
     $config->method('getSecret')->will($this->returnValue('cake'));
     $config->method('getClientID')->will($this->returnValue('Bar007'));
     $response = new Response($request, $user, $config);
     $response->addProperties(['test' => 'more', 'cake' => 'lie']);
     $queryArray = ['cake' => 'lie', 'name' => 'Foo', 'photourl' => 'imgur', 'test' => 'more'];
     $signature = md5(http_build_query($queryArray, NULL, '&') . 'cake');
     $expectedResult = json_encode(['cake' => 'lie', 'name' => 'Foo', 'photourl' => 'imgur', 'test' => 'more', 'client_id' => 'Bar007', 'signature' => $signature]);
     $this->assertEquals($expectedResult, (string) $response);
 }