public function testCanVoidWithExistingOrderWithInvoice()
 {
     $orderMock = $this->getMockBuilder('\\Magento\\Sales\\Model\\Order')->disableOriginalConstructor()->setMethods(['getId', 'hasInvoices'])->getMock();
     $orderMock->expects($this->once())->method('getId')->willReturn(1);
     $orderMock->expects($this->once())->method('hasInvoices')->willReturn(true);
     $this->registryMock->expects($this->once())->method('registry')->with('current_order')->willReturn($orderMock);
     $this->assertEquals(false, $this->model->canVoid());
 }