MAGETWO-81428: Prevent invoice cancelation multiple times 2.2-develop [Backport] #11261

Author: Oleksii Korshenko

app/code/Magento/Sales/Model/Order/Invoice.php

@@ -407,6 +407,9 @@ public function void()
      */
     public function cancel()
     {
+        if (!$this->canCancel()) {
+            return $this;
+        }
         $order = $this->getOrder();
         $order->getPayment()->cancelInvoice($this);
         foreach ($this->getAllItems() as $item) {

app/code/Magento/Sales/Test/Unit/Model/Order/InvoiceTest.php

@@ -8,6 +8,7 @@
 
 namespace Magento\Sales\Test\Unit\Model\Order;
 
+use Magento\Sales\Api\Data\InvoiceInterface;
 use Magento\Sales\Model\Order\Invoice;
 use Magento\Sales\Model\ResourceModel\OrderFactory;
 use Magento\Sales\Model\Order;
@@ -72,7 +73,7 @@ protected function setUp()
             ->setMethods(
                 [
                     'getPayment', '__wakeup', 'load', 'setHistoryEntityName', 'getStore', 'getBillingAddress',
-                    'getShippingAddress'
+                    'getShippingAddress', 'getConfig',
                 ]
             )
             ->getMock();
@@ -83,7 +84,7 @@ protected function setUp()
         $this->paymentMock = $this->getMockBuilder(
             \Magento\Sales\Model\Order\Payment::class
         )->disableOriginalConstructor()->setMethods(
-            ['canVoid', '__wakeup', 'canCapture', 'capture', 'pay']
+            ['canVoid', '__wakeup', 'canCapture', 'capture', 'pay', 'cancelInvoice']
         )->getMock();
 
         $this->orderFactory = $this->createPartialMock(\Magento\Sales\Model\OrderFactory::class, ['create']);
@@ -407,4 +408,58 @@ private function getOrderInvoiceCollection()
 
         return $collection;
     }
+
+    /**
+     * Assert open invoice can be canceled, and its status changes
+     */
+    public function testCancelOpenInvoice()
+    {
+        $orderConfigMock = $this->getMockBuilder(\Magento\Sales\Model\Order\Config::class)
+            ->disableOriginalConstructor()->setMethods(
+                ['getStateDefaultStatus']
+            )->getMock();
+        $orderConfigMock->expects($this->once())->method('getStateDefaultStatus')
+            ->with(Order::STATE_PROCESSING)
+            ->willReturn(Order::STATE_PROCESSING);
+        $this->order->expects($this->once())->method('getPayment')->willReturn($this->paymentMock);
+        $this->order->expects($this->once())->method('getConfig')->willReturn($orderConfigMock);
+        $this->paymentMock->expects($this->once())->method('cancelInvoice')->willReturn($this->paymentMock);
+        $this->eventManagerMock->expects($this->once())
+            ->method('dispatch')
+            ->with('sales_order_invoice_cancel');
+        $this->model->setData(InvoiceInterface::ITEMS, []);
+        $this->model->setState(Invoice::STATE_OPEN);
+        $this->model->cancel();
+        self::assertEquals(Invoice::STATE_CANCELED, $this->model->getState());
+    }
+
+    /**
+     * Assert open invoice can be canceled, and its status changes
+     *
+     * @param $initialInvoiceStatus
+     * @param $finalInvoiceStatus
+     * @dataProvider getNotOpenedInvoiceStatuses
+     */
+    public function testCannotCancelNotOpenedInvoice($initialInvoiceStatus, $finalInvoiceStatus)
+    {
+        $this->order->expects($this->never())->method('getPayment');
+        $this->paymentMock->expects($this->never())->method('cancelInvoice');
+        $this->eventManagerMock->expects($this->never())
+            ->method('dispatch')
+            ->with('sales_order_invoice_cancel');
+        $this->model->setState($initialInvoiceStatus);
+        $this->model->cancel();
+        self::assertEquals($finalInvoiceStatus, $this->model->getState());
+    }
+
+    /**
+     * @return array
+     */
+    public function getNotOpenedInvoiceStatuses()
+    {
+        return [
+            [Invoice::STATE_PAID, Invoice::STATE_PAID],
+            [Invoice::STATE_CANCELED, Invoice::STATE_CANCELED],
+        ];
+    }
 }