public function testGetAddressShippingMethod()
{
$addressMock = $this->getMock('Magento\\Quote\\Model\\Quote\\Address', ['getShippingMethod', '__wakeup'], [], '', false);
$addressMock->expects($this->once())->method('getShippingMethod')->will($this->returnValue('expected shipping method'));
$this->assertEquals('expected shipping method', $this->model->getAddressShippingMethod($addressMock));
}
