MOCK SERVER AND EXTENSIONS FOR APPLICATION TESTING

Techniques are described for employ a mock server that executes on a client to facilitate negative testing of an application and/or other types of testing. The mock server may intercept OData requests sent from an application toward a backend server. For at least some of the intercepted requests, the mock server may determine a mock response to be returned to the application instead of a response that would be generated by the backend server. In some examples, the mock server may employ various mock server extension components to generate the mock response. The mock response may include an error message, warning message, and/or other content, and may be provided to enable negative testing of the application. In some instances, the application employs a user interface (UI) model to provide UI elements.