BUG#AC-6920:Fix with unit test covered

Author: rachana

app/code/Magento/QuoteGraphQl/Model/Resolver/MaskedCartId.php

@@ -44,7 +44,7 @@ class MaskedCartId implements ResolverInterface
      */
     public function __construct(
         QuoteIdToMaskedQuoteIdInterface $quoteIdToMaskedQuoteId,
-         QuoteIdMaskFactory $quoteIdMaskFactory,
+        QuoteIdMaskFactory $quoteIdMaskFactory,
         QuoteIdMaskResourceModel $quoteIdMaskResourceModel
     ) {
         $this->quoteIdToMaskedQuoteId = $quoteIdToMaskedQuoteId;
@@ -78,7 +78,6 @@ private function getQuoteMaskId(int $quoteId): string
     {
         try {
             $maskedId =$this->ensureQuoteMaskExist($quoteId);
-            //$maskedId = $this->quoteIdToMaskedQuoteId->execute($quoteId);
         } catch (NoSuchEntityException $exception) {
             throw new GraphQlNoSuchEntityException(__('Current user does not have an active cart.'));
         }
@@ -109,3 +108,4 @@ private function ensureQuoteMaskExist(int $quoteId): string
     }
 
 }
+

app/code/Magento/QuoteGraphQl/Test/Unit/Model/Resolver/MaskedCartIdTest.php

@@ -0,0 +1,121 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Test\Unit\Model\Resolver;
+
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\GraphQl\Model\Query\Context;
+use Magento\Quote\Model\QuoteIdMaskFactory;
+use Magento\Quote\Model\QuoteIdToMaskedQuoteIdInterface;
+use Magento\Quote\Model\ResourceModel\Quote\QuoteIdMask as QuoteIdMaskResourceModel;
+use Magento\QuoteGraphQl\Model\Resolver\Cart;
+use Magento\QuoteGraphQl\Model\Resolver\MaskedCartId;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+class MaskedCartIdTest extends TestCase
+{
+    /**
+     * @var MaskedCartId
+     */
+    private MaskedCartId $maskedCartId;
+
+    /**
+     * @var QuoteIdToMaskedQuoteIdInterface|MockObject
+     */
+    private QuoteIdToMaskedQuoteIdInterface $quoteIdToMaskedQuoteIdMock;
+
+    /**
+     * @var QuoteIdMaskFactory|MockObject
+     */
+    private QuoteIdMaskFactory $quoteIdMaskFactoryMock;
+
+    /**
+     * @var QuoteIdMaskResourceModel|MockObject
+     */
+    private QuoteIdMaskResourceModel $quoteIdMaskResourceModelMock;
+
+    /**
+     * @var Field|MockObject
+     */
+    private Field $fieldMock;
+
+    /**
+     * @var ResolveInfo|MockObject
+     */
+    private ResolveInfo $resolveInfoMock;
+
+    /**
+     * @var Context|MockObject
+     */
+    private Context $contextMock;
+
+    /**
+     * @var cart|MockObject
+     */
+    private Cart $cartMock;
+
+    /**
+     * @var array
+     */
+    private array $valueMock = [];
+
+    protected function setUp(): void
+    {
+        $this->quoteIdToMaskedQuoteIdMock = $this->createMock(QuoteIdToMaskedQuoteIdInterface::class);
+        $this->quoteIdMaskFactoryMock = $this->createMock(QuoteIdMaskFactory::class);
+        $this->quoteIdMaskResourceModelMock = $this->createMock(QuoteIdMaskResourceModel::class);
+        $this->fieldMock = $this->createMock(Field::class);
+        $this->resolveInfoMock = $this->createMock(ResolveInfo::class);
+        $this->contextMock = $this->createMock(Context::class);
+        $this->cartMock = $this->getMockBuilder(Cart::class)
+            ->disableOriginalConstructor()
+            ->addMethods(['getId'])
+            ->getMock();
+        $this->quoteIdMaskResourceModelMock = $this->getMockBuilder(QuoteIdMaskResourceModel::class)
+            ->disableOriginalConstructor()
+            ->addMethods(
+                [
+                    'getQuoteMaskId',
+                    'ensureQuoteMaskExist'
+                ]
+            )
+            ->getMock();
+        $this->maskedCartId = new MaskedCartId(
+            $this->quoteIdToMaskedQuoteIdMock,
+            $this->quoteIdMaskFactoryMock,
+            $this->quoteIdMaskResourceModelMock
+        );
+    }
+    public function testResolveWithoutModelInValueParameter(): void
+    {
+        $this->expectException(LocalizedException::class);
+        $this->expectExceptionMessage('"model" value should be specified');
+        $this->maskedCartId->resolve($this->fieldMock, $this->contextMock, $this->resolveInfoMock, $this->valueMock);
+    }
+
+    public function testResolve(): void
+    {
+        $this->valueMock = ['model' => $this->valueMock];
+        $this->cartMock
+            ->expects($this->any())
+            ->method('getId');
+        $this->quoteIdMaskResourceModelMock
+            ->expects($this->any())
+            ->method('getQuoteMaskId')
+            ->willReturn('maskedId');
+        $this->quoteIdMaskResourceModelMock
+            ->expects($this->any())
+            ->method('ensureQuoteMaskExist')
+            ->willReturn('maskedId');
+
+    }
+}
+
+