Investigate the changes in createEmptyCart for Customer

[TomashKhamlai]

Preconditions (*)

1. Customer is registered
2. Product in stock

Steps to reproduce (*)

1. Generate Customer token
2. Create an empty Cart and add product (or add a product to Cart)
3. Use createEmptyCart > 499 times using this script:

#!/bin/bash
### The next line should look this graphql='http://gql-ce.io/graphql';
graphql='http://REPLACE/graphql';

# Create Token
function generateCustomerToken () {
  local email=$(echo "John.Doe@example.com");
  local password="123123qA";

  if [[ -z "$2" ]]; then
    local email_a=${email};
    local password_a=${password};
  else
    local email_a="$1";
    local password_a="$2";
  fi

    read -r -d '' query << 'QUERY'
mutation generateCustomerToken(
    $email: String!
    $password: String!
) {
    generateCustomerToken(
        email: $email
        password: $password
    ) {
        token
    }
}
QUERY
    read -r -d '' variables << VARIABLES
{
    "email": "${email_a}",
    "password": "${password_a}"
}
VARIABLES
    query='{"query":"'${query//[[:space:]]/ }'"'${variables:+',"variables":'}${variables:+${variables//[[:space:]]/ }}};
    query=${query//+([[:blank:]])/ };
    local response=$(curl \
        -X POST ${graphql} \
        -H 'Content-Type: application/json' \
        -d "$query"
    );
    customer_token=$(echo ${response} | jq -r '.data.generateCustomerToken.token');
}

function createEmptyCartForCustomer () {
read -r -d '' query << 'QUERY'
    mutation {
      createEmptyCart
    }
QUERY
    query='{"query":"'${query//[[:space:]]/ }'"'}
    query=${query//+([[:blank:]])/ }

    local response=$(curl \
        -X POST ${graphql} \
        -H 'Content-Type: application/json' \
        -H "Authorization: Bearer $customer_token" \
        -d "$query"
    ) && cart_id=$(echo ${response} | jq -r '.data.createEmptyCart');
}

generateCustomerToken
# 500 is a pager limit in phpstorm
for (( i = 1; i < 505; i++ )); do
	createEmptyCartForCustomer; 
done

echo "$cart_id";

4. Prepare cart for placing order
5. Place order
6. Perform query to MySQL to count the number of occurrences, If your MySQL is not on Docker then it can be simplified

mysql -uroot -p123123q -h127.0.0.1 -e'SELECT quote_id, count(*) as NUMBER FROM gqlce.quote_id_mask GROUP BY quote_id';

My result is

+----------+--------+
| quote_id | NUMBER |
+----------+--------+
|        1 |      1 |
|        2 |      1 |
|        3 |   2770 |
+----------+--------+

But your's should look like:

+----------+--------+
| quote_id | NUMBER |
+----------+--------+
|        1 |    505 |
+----------+--------+

Expected result (*)

1. Old behavior, the same quote_masked_id on every request for createEmptyCart if valid Customer token was used. Why waste memory? We have only 2,147,483,647 records available.

Actual result (*)

1. Hige amount of records referencing the same quote.
2. Haven't found the ticket about these changes.

[TomashKhamlai]

@naydav, please verify this issue

[TomashKhamlai]

Proper behavior should be protected by (integration/api-functional) tests.