Contemporary websites are intricate n-tier software systems equipped with web interfaces. In their quest for reliable development tools akin to those utilized in other programming environments, developers have expressed a need for enhanced support in web development. Consequently, we have introduced WebKing, a groundbreaking tool designed to help developers identify and rectify errors during the construction of n-tier web applications. By leveraging established testing methodologies that have proven effective in enhancing the quality of C/C++ and Java code, WebKing seamlessly integrates these techniques into dynamic web application development. With WebKing, web developers can automate various testing processes, including white-box, black-box, and regression testing, in addition to a novel approach known as web-box testing, which allows for unit testing of dynamic web pages. This comprehensive suite of testing capabilities empowers developers to ensure their applications are robust and dependable.