ENGCOM-1885: issue/14056 - Coupon API not working for guest user #15320

 - Merge Pull Request #15320 from Hypo386/magento2:issue/14056
 - Merged commits:
   1. 6ad9c03
   2. 8b7bb58

Author: magento-engcom-team

app/code/Magento/Quote/Model/CouponManagement.php

@@ -56,6 +56,9 @@ public function set($cartId, $couponCode)
         if (!$quote->getItemsCount()) {
             throw new NoSuchEntityException(__('Cart %1 doesn\'t contain products', $cartId));
         }
+        if (!$quote->getStoreId()) {
+            throw new NoSuchEntityException(__('Cart isn\'t assigned to correct store'));
+        }
         $quote->getShippingAddress()->setCollectShippingRates(true);
 
         try {

app/code/Magento/Quote/Test/Unit/Model/CouponManagementTest.php

@@ -49,6 +49,7 @@ protected function setUp()
                 'save',
                 'getShippingAddress',
                 'getCouponCode',
+                'getStoreId',
                 '__wakeup'
             ]);
         $this->quoteAddressMock = $this->createPartialMock(\Magento\Quote\Model\Quote\Address::class, [
@@ -100,6 +101,9 @@ public function testSetWhenCouldNotApplyCoupon()
         $cartId = 33;
         $couponCode = '153a-ABC';
 
+        $this->storeMock->expects($this->any())->method('getId')->will($this->returnValue(1));
+        $this->quoteMock->expects($this->once())->method('getStoreId')->willReturn($this->returnValue(1));
+
         $this->quoteRepositoryMock->expects($this->once())
             ->method('getActive')->with($cartId)->will($this->returnValue($this->quoteMock));
         $this->quoteMock->expects($this->once())->method('getItemsCount')->will($this->returnValue(12));
@@ -127,6 +131,9 @@ public function testSetWhenCouponCodeIsInvalid()
         $cartId = 33;
         $couponCode = '153a-ABC';
 
+        $this->storeMock->expects($this->any())->method('getId')->will($this->returnValue(1));
+        $this->quoteMock->expects($this->once())->method('getStoreId')->willReturn($this->returnValue(1));
+
         $this->quoteRepositoryMock->expects($this->once())
             ->method('getActive')->with($cartId)->will($this->returnValue($this->quoteMock));
         $this->quoteMock->expects($this->once())->method('getItemsCount')->will($this->returnValue(12));
@@ -146,6 +153,9 @@ public function testSet()
         $cartId = 33;
         $couponCode = '153a-ABC';
 
+        $this->storeMock->expects($this->any())->method('getId')->will($this->returnValue(1));
+        $this->quoteMock->expects($this->once())->method('getStoreId')->willReturn($this->returnValue(1));
+
         $this->quoteRepositoryMock->expects($this->once())
             ->method('getActive')->with($cartId)->will($this->returnValue($this->quoteMock));
         $this->quoteMock->expects($this->once())->method('getItemsCount')->will($this->returnValue(12));