Wal-Mart Stores, Inc. (NYSE:WMT) has started testing out an online grocery delivery service in San Jose, California over the weekend. The new service is called “Walmart To Go.” The Walmart To Go service allows customers to order groceries and other goods through Walmart.com and have them delivered to their house. If Walmart decides to stay in the grocery delivery business, they will compete directly with Amazon Fresh and Peapod. [Reuters]