SparkPost\SparkPostResponse::hasHeader PHP Метод

    public function hasHeader($name)
    {
        return $this->response->hasHeader($name);
    }

 public function testHasHeader()
 {
     $param = 'header';
     $this->responseMock->shouldReceive('hasHeader')->andReturn($this->returnValue);
     $sparkpostResponse = new SparkPostResponse($this->responseMock);
     $this->assertEquals($this->responseMock->hasHeader($param), $sparkpostResponse->hasHeader($param));
 }