OpenTTCN Architecture

OpenTTCN Tester / OpenTTCN Runtime

OpenTTCN Tester for TTCN-3 is a TTCN-3 test execution tool based on a virtual machine and a hybrid just-in-time-compiler and interpreter. The tool supports TTCN-3, TTCN-2, and ASN.1. The support for CORBA IDL (Interface Definition Language) is in progress being added.

OpenTTCN Tester for TTCN-3 consists of two parts: tester, and SDK. The tester implements compiler, test components, and other functionality needed for executing test cases. The SDK provides support for TTCN-3 TRI, TCI-CD, and TCI-TM interfaces by supplying libraries needed for programming using these interfaces.

The following diagram shows the the major entities of the OpenTTCN-based test system. Each entity is described in more detail below.

Test System Applications

Test system applications are the complete test systems for specific application domain and they consists of a domain specific TTCN-3 test suite, OpenTTCN runtime or development tools, and domain specific application components and test management user interface.

Applications Components

Application components i.e. TTCN-3 SUT adapter, platform adapter, and coding and decoding are specific to the domain of interest and are usually programmed to be used with a certain TTCN-3 test suite. Application components are programmed using the ANSI C, C++, Java, and C# programming language and linked with OpenTTCN TTCN-3 libraries.

Compilers

In Windows, OpenTTCN supports Visual Studio 2008*, Visual Studio 2005, Visual Studio 2003, Visual C++ 6.0, MinGW GCC 4*, Java JDK*, and Visual Studio 2005 and Visual Studio 2008 for C# (for .NET Framework)*. * = Available in February 15th, 2008.

In Linux, OpenTTCN supports, GCC 3.3 or earlier, and GCC 3.4 or later C/C++ compiler.

Operating Systems

OpenTTCN supports Windows XP, Windows Vista, various Linux distributions, and Free-BSD operating system. In the future, OpenTTCN plans to support Apple Leopard and Sun Solaris operating systems.

Other Parts of Complete Test Setup

TTCN Editor

In the context of TTCN-3, the used editor is either user preferred text editor or a specialized TTCN-3 editor used for editing TTCN-3 modules before they are processed and compiled using OpenTTCN Tester.

In the context of TTCN-2, OpenTTCN recommends the use of Leonardo Editor Pro TTCN-2 editor for editing TTCN-2 modules before they are processed and compiled using OpenTTCN Tester. Leonardo Editor Pro is a product and a trademark of Da Vinci Communications GmbH.

System Under Test

SUT: System Under Test is the complete real system in which the Implementation Under Test (IUT) resides. Usually the SUT is somewhat complete product or implementation needed for testing the IUT.

IUT: Implementation Under Test (IUT) is an implementation of a protocol, service, feature, etc in adjacent user or provider relationship to the test system, being that part of a real SUT which is being studied by testing.

The above are adaptations of SUT and IUT definitions presented in ISO 9646-1 / IUT-T X.290.

Examples of correspondence of SUT and IUT:

SUT	IUT
WiMAX base station	WiMAX MAC protocol implementation
WiMAX subscriber station	WiMAX MAC protocol implementation
3G mobile phone	3G call control protocol implementation
GSM mobile phone	GSM mobility management protocol implementation
Router	OSPF protocol implementation
SIP proxy	SIP protocol implementation
DNS server	DNS protocol implementation