The TTCN-3 Metamodel

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• The TTCN-3 Metamodel A Basis for Tool
  Integration
• Ina Schieferdecker TU Berlin/Fraunhofer Fokus
• Hajo Eichler, Zhen Ru DaiFraunhofer Fokus
• Mang Li, Wolfram Kroll
• Testing Technologies

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Contents

• Context (MDA, MOF)
• Motivation
• TTCN-3 Meta-Model
• Meta-Model based Tools in Eclipse
• Outlook

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Context

• Model-based development has gained a lot in the
  context of UML
• Model-based development is known in testing since
  years and used for
• Test generation from models
• Test validation against models
• Test coverage analysis
• With the graphical definition of tests with
• Graphical format of TTCN-3 (ETSI)
• UML 2.0 testing profile (OMG)

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The Model Driven Architecture

• Model Driven Architecture (MDA) is the new OMG
  architecture (first announced Nov 2000)
• MDA extends the OMA (Object Management
  Architecture) by integrating modelling standards
• MDA defines an approach to separate system
  functionality specification from specification of
  implementation of that functionality on a
  specific platform

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Evolutions in Software Construction
?
C O M P L E X I T Y

FLEXIBILITY
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The Meta Object Facility (MOF)

• OMG standard for defining, representing and
  managing metadata
• Design and implement metamodels and models
• Use UML classes for specification
• Discover and manipulate metadata
• Find and manage metadata repositories
• Provides a MOF-to-IDL mapping to automate
  generation of concrete object interfaces for
  specific metamodels
• Provides a MOF-to-XML mapping to automate
  generation of XML schema and documents

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Metamodel based Infrastructure
Platform Independent System Models
Platform Specific System Models
SystemCode

• Test generation
• Test compilation
• ...
• Are just model transformers

MOF Model Bus

Platform Independent Test Models
Platform Specific Test Models
TestCode
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Use of MOF for TTCN-3
Meta-meta-model
Meta-model
Models
Data
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Motivation

• Separation of concerns
• TTCN-3 concept space (the TTCN-3 metamodel)
  separated from TTCN-3 syntax (the core language
  and the presentation formats)
• Definition of the semantics on concept space
  level
• Syntax changes do not affect semantics definition
• Ease the exchange of TTCN-3 specifications (not
  only textual ones)
• Mappings of external languages to TTCN-3 can
  reuse parts of the conceptual mapping from other
  languages

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Changing view from
ASN.1 Types Values
TTCN-3 Core Language
Tabular Format
Graphical Format
Presentation Format n
Other Types Values n
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to
Improvements in tool interoperation, model
exchange, Interface to the user remains the
same, But better features can be provided
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Some insight Modules
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Some insight Scopes
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The Programming Environment Eclipse

• Eclipse is
• an universal tool platform and
• an open extensible IDE
• for anything and nothing in particular.
• Eclipse Platform Technical Overview Object
  Technology International, Inc., February 2003
• Eclipse Modeling Framework
• models and meta-models
• code generation facility
• serialization and loading

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The Resulting Repository

• Java packages
• Java interfaces that define the APIs to access
  instances of the classes in the model
• Java classes that implement those interfaces
• A generated adapter factory and a generated
  switch class (useful when implementing adapters)

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Use of the repository
Test Specification TTCN-3 GFT
Test Execution TTCN-3 Debugging
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TTCN-3 IDE an Impression
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Outlook

• Revise the metamodel for a test suite validation
  approach within TTmedal
• Development of model transformers for
• Platform independent system models to platform
• independent tests (PIM to PIT)
• Platform specific system models to platform
  specific
• tests (PSM to PST)
• ...
• See next presentation

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Thank you !