MC-21756: Persistent Shopping Cart Issue

- Magento should process the order with the persistent information including tier pricing

Author: viktym

app/code/Magento/Checkout/view/frontend/web/js/view/form/element/email.js

@@ -185,6 +185,10 @@ define([
          * @returns {Boolean} - initial visibility state.
          */
         resolveInitialPasswordVisibility: function () {
+            if (checkoutData.getInputFieldEmailValue() !== '' && checkoutData.getCheckedEmailValue() === '') {
+                return true;
+            }
+
             if (checkoutData.getInputFieldEmailValue() !== '') {
                 return checkoutData.getInputFieldEmailValue() === checkoutData.getCheckedEmailValue();
             }

app/code/Magento/Persistent/Model/QuoteManager.php

@@ -121,7 +121,6 @@ public function convertCustomerCartToGuest()
                 ->setCustomerEmail(null)
                 ->setCustomerFirstname(null)
                 ->setCustomerLastname(null)
-                ->setCustomerGroupId(\Magento\Customer\Api\Data\GroupInterface::NOT_LOGGED_IN_ID)
                 ->setIsPersistent(false);
             $quote->getAddressesCollection()->walk('setCustomerAddressId', ['customerAddressId' => null]);
             $quote->getAddressesCollection()->walk('setCustomerId', ['customerId' => null]);

app/code/Magento/Persistent/Test/Unit/Model/QuoteManagerTest.php

@@ -258,8 +258,7 @@ public function testConvertCustomerCartToGuest()
             ->method('setCustomerFirstname')->with(null)->willReturn($this->quoteMock);
         $this->quoteMock->expects($this->once())
             ->method('setCustomerLastname')->with(null)->willReturn($this->quoteMock);
-        $this->quoteMock->expects($this->once())->method('setCustomerGroupId')
-            ->with(\Magento\Customer\Model\GroupManagement::NOT_LOGGED_IN_ID)
+        $this->quoteMock->expects($this->never())->method('setCustomerGroupId')
             ->willReturn($this->quoteMock);
         $this->quoteMock->expects($this->once())
             ->method('setIsPersistent')->with(false)->willReturn($this->quoteMock);