public function testIsModifiedBypass()
{
$dataObjectMock = $this->getMockBuilder('Magento\\Framework\\DataObject')->disableOriginalConstructor()->setMethods(['getId', 'getData'])->getMock();
$dataObjectMock->expects($this->any())->method('getId')->willReturn(null);
$dataObjectMock->expects($this->once())->method('getData')->willReturn(['is_billing_address' => 1]);
$this->metadataMock->expects($this->once())->method('getFields')->with($dataObjectMock)->willReturn(['is_billing_address' => null]);
$this->model->registerSnapshot($dataObjectMock);
$this->assertEquals(true, $this->model->isModified($dataObjectMock));
}
