MAGETWO-63274: Adding pager to front order view page

Author: Stanislav Idolov

app/code/Magento/Sales/Test/Unit/Block/Order/ItemsTest.php

@@ -0,0 +1,135 @@
+<?php
+/**
+ * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Sales\Block\Order;
+
+class ItemsTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var \Magento\Sales\Block\Order\Items
+     */
+    private $model;
+
+    /**
+     * @var \Magento\Framework\View\LayoutInterface
+     */
+    private $layout;
+
+    /**
+     * @var \Magento\Framework\ObjectManagerInterface
+     */
+    private $objectManager;
+
+    /**
+     * @var \Magento\Framework\Registry
+     */
+    private $registry;
+
+    protected function setUp()
+    {
+        $this->objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
+        $this->layout = $this->objectManager->get(\Magento\Framework\View\LayoutInterface::class);
+        $this->registry = $this->objectManager->get(\Magento\Framework\Registry::class);
+    }
+
+    /**
+     * @magentoDataFixture Magento/Sales/_files/order.php
+     */
+    public function testGetOrderItems()
+    {
+        $this->registerOrder();
+        $this->model = $this->layout->createBlock(\Magento\Sales\Block\Order\Items::class);
+        $this->assertTrue(count($this->model->getItems()) > 0);
+    }
+
+    /**
+     * @magentoAppIsolation enabled
+     * @magentoConfigFixture default/sales/orders/items_per_page 3
+     * @magentoDataFixture Magento/Sales/_files/order_item_list.php
+     */
+    public function testPagerIsDisplayed()
+    {
+        $this->registerOrder();
+
+        /** @var \Magento\Sales\Block\Order\Items model */
+        $this->model = $this->layout->createBlock(\Magento\Sales\Block\Order\Items::class, 'items_block');
+        $this->layout->addBlock(
+            $this->objectManager->get(\Magento\Theme\Block\Html\Pager::class),
+            'sales_order_item_pager',
+            'items_block'
+        );
+        $this->model->setLayout($this->layout);
+
+        $this->assertTrue($this->model->isPagerDisplayed());
+    }
+
+    /**
+     * @magentoDataFixture Magento/Sales/_files/order_item_list.php
+     */
+    public function testPagerIsNotDisplayed()
+    {
+        $this->registerOrder();
+
+        /** @var \Magento\Sales\Block\Order\Items model */
+        $this->model = $this->layout->createBlock(\Magento\Sales\Block\Order\Items::class, 'items_block');
+        $this->layout->addBlock(
+            $this->objectManager->get(\Magento\Theme\Block\Html\Pager::class),
+            'sales_order_item_pager',
+            'items_block'
+        );
+        $this->model->setLayout($this->layout);
+
+        $this->assertFalse($this->model->isPagerDisplayed());
+    }
+
+    /**
+     * @magentoAppIsolation enabled
+     * @magentoAppArea frontend
+     * @magentoConfigFixture default/sales/orders/items_per_page 3
+     * @magentoDataFixture Magento/Sales/_files/order_item_list.php
+     */
+    public function testGetPagerHtml()
+    {
+        $this->registerOrder();
+
+        /** @var \Magento\Sales\Block\Order\Items model */
+        $this->model = $this->layout->createBlock(\Magento\Sales\Block\Order\Items::class, 'items_block');
+        $this->layout->addBlock(
+            $this->objectManager->get(\Magento\Theme\Block\Html\Pager::class),
+            'sales_order_item_pager',
+            'items_block'
+        );
+        $this->model->setLayout($this->layout);
+
+        $this->assertNotEmpty($this->model->getPagerHtml());
+    }
+
+    /**
+     * @magentoDataFixture Magento/Sales/_files/order.php
+     */
+    public function testGetOrder()
+    {
+        $order = $this->registerOrder();
+
+        /** @var \Magento\Sales\Block\Order\Items model */
+        $this->model = $this->layout->createBlock(\Magento\Sales\Block\Order\Items::class, 'items_block');
+        $this->assertEquals($order, $this->model->getOrder());
+    }
+
+    /**
+     * Register order in registry
+     *
+     * @return \Magento\Sales\Model\Order
+     */
+    private function registerOrder()
+    {
+        /** @var \Magento\Sales\Model\Order $order */
+        $order = $this->objectManager->get(\Magento\Sales\Model\Order::class);
+        $order->loadByIncrementId('100000001');
+        $this->registry->register('current_order', $order);
+        return $order;
+    }
+}