Lecture Notes in Computer Science 3472

16 TTCN-3 469
dinosaur entry is given as a collection of information about the dinosaur. It
isdescribedintermsofthename,time, place, length and location. The web
service interface offers different functionalities like search, add, remove, update
of dinosaur registrations. The purpose of our TTCN-3 based test system is to
validate the correct behavior of these operations. In TTCN-3 we define the test
data which the test cases interchange with the SUT, the test configuration by
means of test components and ports, and the validated test behavior.
The data format of the entries in the Dino web service is given in form of
XML Schema. All entries in the Dino web service must follow this structure.
A web service is a URL-addressable resource returning information in response
to client requests. Web services are integrated into other applications or
web sites, even though they exist on other servers. So for example, a web site
providing quotes for car insurance could make requests behind the scenes to a
web service to get the estimated value of a particular car model and to another
web service to get the current interest rate.
This example will be used in all following sections in order to exemplify
the presented concepts. We will introduce the language by enumerating its main
elements and in parallel we will design a complete test system for our web service
example. Similarly, we describe the components of the execution environment
by showing, on top of this example, how these components are applicable in
practice.
16.3 TTCN-3 Based Test Specification
This section is an overview of the TTCN-3 core language and it introduces almost
all its key elements. The chapter groups the concepts in four parts: Section
1.3.1 presents the structure of a TTCN-3 test suite, 1.3.2 discuses the test system
configuration, 1.3.3 groups together all possibilities to specify test data in
TTCN-3, and 1.3.4 describes how the test behavior can be defined in TTCN-3.