Search: Add unit test for PopularSearchTerms model

app/code/Magento/Search/Test/Unit/Model/PopularSearchTermsTest.php

@@ -0,0 +1,95 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Search\Test\Unit\Model;
+
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Search\Model\PopularSearchTerms;
+use Magento\Search\Model\ResourceModel\Query\Collection;
+use Magento\Store\Model\ScopeInterface;
+
+/**
+ * @covers \Magento\Search\Model\PopularSearchTerms
+ */
+class PopularSearchTermsTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * Testable Object
+     *
+     * @var PopularSearchTerms
+     */
+    private $popularSearchTerms;
+
+    /**
+     * @var ScopeConfigInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $scopeConfigMock;
+
+    /**
+     * @var Collection|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $queryCollectionMock;
+
+    /**
+     * Set Up
+     *
+     * @return void
+     */
+    protected function setUp()
+    {
+        $this->scopeConfigMock = $this->createMock(ScopeConfigInterface::class);
+        $this->queryCollectionMock = $this->createMock(Collection::class);
+        $this->popularSearchTerms = new PopularSearchTerms($this->scopeConfigMock, $this->queryCollectionMock);
+    }
+
+    /**
+     * Test isCacheableDataProvider method
+     *
+     * @dataProvider isCacheableDataProvider
+     *
+     * @param string $term
+     * @param array $terms
+     * @param $expected $terms
+     *
+     * @return void
+     */
+    public function testIsCacheable($term, $terms, $expected)
+    {
+        $storeId = 7;
+        $pageSize = 25;
+
+        $this->scopeConfigMock->expects($this->once())->method('getValue')
+            ->with(
+                PopularSearchTerms::XML_PATH_MAX_COUNT_CACHEABLE_SEARCH_TERMS,
+                ScopeInterface::SCOPE_STORE,
+                $storeId
+            )->willReturn($pageSize);
+        $this->queryCollectionMock->expects($this->once())->method('setPopularQueryFilter')->with($storeId)
+            ->willReturnSelf();
+        $this->queryCollectionMock->expects($this->once())->method('setPageSize')->with($pageSize)
+            ->willReturnSelf();
+        $this->queryCollectionMock->expects($this->once())->method('load')->willReturnSelf();
+        $this->queryCollectionMock->expects($this->once())->method('getColumnValues')->with('query_text')
+            ->willReturn($terms);
+
+        $actual = $this->popularSearchTerms->isCacheable($term, $storeId);
+        self::assertEquals($expected, $actual);
+    }
+
+    /**
+     * @return array
+     */
+    public function isCacheableDataProvider()
+    {
+        return [
+            ['test01', [], false],
+            ['test02', ['test01', 'test02'], true],
+            ['test03', ['test01', 'test02'], false],
+            ['test04', ['test04'], true],
+        ];
+    }
+}