MC-43039: Stock source Import performance issues

Author: bubasuma

app/code/Magento/Bundle/Test/Unit/Model/ResourceModel/Selection/Collection/FilterApplierTest.php

@@ -0,0 +1,91 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Bundle\Test\Unit\Model\ResourceModel\Selection\Collection;
+
+use Magento\Bundle\Model\ResourceModel\Selection\Collection\FilterApplier;
+use Magento\Framework\DB\Select;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test selection collection filter applier
+ */
+class FilterApplierTest extends TestCase
+{
+    /**
+     * @var FilterApplier
+     */
+    private $model;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->model = new FilterApplier();
+    }
+
+    /**
+     * @param $field
+     * @param $value
+     * @param $conditionType
+     * @param $expectedCondition
+     * @param $expectedValue
+     * @dataProvider applyDataProvider
+     */
+    public function testApply($field, $value, $conditionType, $expectedCondition, $expectedValue): void
+    {
+        $tableName = 'catalog_product_bundle_selection';
+        $select = $this->createMock(Select::class);
+        $collection = $this->createMock(\Magento\Bundle\Model\ResourceModel\Selection\Collection::class);
+        $collection->method('getSelect')
+            ->willReturn($select);
+        $collection->method('getTable')
+            ->willReturnArgument(0);
+        $select->method('getPart')
+            ->willReturnMap(
+                [
+                    [
+                        'from',
+                        [
+                            'selection' => [
+                                'tableName' => $tableName
+                            ]
+                        ]
+                    ]
+                ]
+            );
+        $select->expects($this->once())
+            ->method('where')
+            ->with($expectedCondition, $expectedValue);
+        $this->model->apply($collection, $field, $value, $conditionType);
+    }
+
+    /**
+     * @return array
+     */
+    public function applyDataProvider(): array
+    {
+        return [
+            [
+                'id',
+                1,
+                'eq',
+                'selection.id = ?',
+                1
+            ],
+            [
+                'id',
+                [1, 3],
+                'in',
+                'selection.id IN (?)',
+                [1, 3]
+            ]
+        ];
+    }
+}