ENGCOM-6669: Unit test for Magento\Fedex\Plugin\Block\Tracking\PopupDeliveryDate #26487

 - Merge Pull Request #26487 from karyna-tsymbal-atwix/magento2:unit-test-fedex-plugin-popupDeliveryDate
 - Merged commits:
   1. bf77523
   2. 7d316ec
   3. 0671b7f
   4. 9f6fcbb
   5. cdc0834
   6. bcc19dc

Author: magento-engcom-team

app/code/Magento/Fedex/Test/Unit/Plugin/Block/Tracking/PopupDeliveryDateTest.php

@@ -0,0 +1,122 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\Fedex\Test\Unit\Plugin\Block\Tracking;
+
+use Magento\Fedex\Model\Carrier;
+use Magento\Fedex\Plugin\Block\Tracking\PopupDeliveryDate;
+use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
+use Magento\Shipping\Block\Tracking\Popup;
+use Magento\Shipping\Model\Tracking\Result\Status;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Unit Test for \Magento\Fedex\Plugin\Block\Tracking\PopupDeliveryDate
+ */
+class PopupDeliveryDateTest extends TestCase
+{
+    const STUB_CARRIER_CODE_NOT_FEDEX = 'not-fedex';
+    const STUB_DELIVERY_DATE = '2020-02-02';
+    const STUB_DELIVERY_TIME = '12:00';
+
+    /**
+     * @var MockObject|PopupDeliveryDate
+     */
+    private $plugin;
+
+    /**
+     * @var MockObject|Status $trackingStatusMock
+     */
+    private $trackingStatusMock;
+
+    /**
+     * @var MockObject|Popup $subjectMock
+     */
+    private $subjectMock;
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp()
+    {
+        $this->trackingStatusMock = $this->getStatusMock();
+        $this->subjectMock = $this->getPopupMock();
+        $this->subjectMock->expects($this->once())
+            ->method('getTrackingInfo')
+            ->willReturn([[$this->trackingStatusMock]]);
+
+        $objectManagerHelper = new ObjectManager($this);
+        $this->plugin = $objectManagerHelper->getObject(PopupDeliveryDate::class);
+    }
+
+    /**
+     * Test the method with Fedex carrier
+     */
+    public function testAfterFormatDeliveryDateTimeWithFedexCarrier()
+    {
+        $this->trackingStatusMock->expects($this::once())
+            ->method('getCarrier')
+            ->willReturn(Carrier::CODE);
+        $this->subjectMock->expects($this->once())->method('formatDeliveryDate');
+
+        $this->executeOriginalMethod();
+    }
+
+    /**
+     * Test the method with a different carrier
+     */
+    public function testAfterFormatDeliveryDateTimeWithOtherCarrier()
+    {
+        $this->trackingStatusMock->expects($this::once())
+            ->method('getCarrier')
+            ->willReturn(self::STUB_CARRIER_CODE_NOT_FEDEX);
+        $this->subjectMock->expects($this->never())->method('formatDeliveryDate');
+
+        $this->executeOriginalMethod();
+    }
+
+    /**
+     * Returns Mock for \Magento\Shipping\Model\Tracking\Result\Status
+     *
+     * @return MockObject
+     */
+    private function getStatusMock(): MockObject
+    {
+        return $this->getMockBuilder(Status::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['getCarrier'])
+            ->getMock();
+    }
+
+    /**
+     * Returns Mock for \Magento\Shipping\Block\Tracking\Popup
+     *
+     * @return MockObject
+     */
+    private function getPopupMock(): MockObject
+    {
+        return $this->getMockBuilder(Popup::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['formatDeliveryDate', 'getTrackingInfo'])
+            ->getMock();
+    }
+
+    /**
+     * Run plugin's original method
+     */
+    private function executeOriginalMethod()
+    {
+        $this->plugin->afterFormatDeliveryDateTime(
+            $this->subjectMock,
+            'Test Result',
+            self::STUB_DELIVERY_DATE,
+            self::STUB_DELIVERY_TIME
+        );
+    }
+}