SoapUI
Rest OnRequest sample Groovy
http://www.soapui.org/apidocs/com/eviware/soapui/impl/rest/mock/RestMockRequest.html
http://www.soapui.org/apidocs/com/eviware/soapui/impl/rest/mock/RestMockResult.html
import com.eviware.soapui.impl.rest.mock.RestMockResult RestMockResult res = new RestMockResult( mockRequest ) String val ="{test:1234}" mockRequest.httpResponse.writer << val mockRequest.httpResponse.status = 200 mockRequest return res