Lesson 4.1: Creating a service stub

In this lesson, learn how to create a service stub from a Web Service Description Language (WSDL) specification.

About this task

Service stubs are simulations of an actual service, which can be used to functionally replace the service in a test environment. A stub server replaces the actual application server in cases where it is not practical to use the server. For example, use a stub server in these instances:
  • If you are testing a local service that uses data from a remote service, you might need to inject specific content into the service under test from the remote service. You can simulate the remote service with a service stub to ensure that the local service responds correctly to specific input.
  • Some commercial service providers charge users for each request. If you are testing such a service, you can develop and debug your test against a stub service, which is based on the WSDL of the actual service, without being charged by the service provider.
  • During integration of a large application that involves multiple clients and services, some services might not yet be operational, although their WSDL specifications are available. You can simulate the missing services with service stubs so that you can proceed with the integration work.

From the point of view of the client application, the service stub looks identical to the actual service that it simulates. To use a service stub as a replacement of the actual service, you must be able to replace the URL of the original service in the client application with the URL of the stub server.

You create a service stub by providing a current WSDL specification. The service stub is generated with the exact same ports and bindings as the original service so that it can be addressed with exactly the same interface. Each operation in the service returns a default response of the type defined by the WSDL.

See video