Component-based Simulation Framework
for Testing of Software Components
Tomáš Potužák
Department of Computer Science and Engineering
Faculty of Applied Sciences
University of West Bohemia, Pilsen, Czech Republic
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Presentation Content
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Introduction and Motivation
Component Models and Frameworks
Simulation Framework Description
> Features
> Components Interactions
> Restrictions and Issues
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Live Demonstration of the Simulation Framework
Future Work
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Introduction and Motivation
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Software component approach
> System constructed from set of individual components potentially
created by various parties
> Each component considered as black-box with no externally
observable state
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Testing of components
> Often tested for extra-functional properties and quality of services
(functionality according specification often considered implied)
> Often utilization of potentially incorrect models of components
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Simulation framework for testing of real components
Component Models and Frameworks
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Component model
> Specifies the look, behavior, and interaction of the components
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Component framework
> Implementation of an specific component model
> Not to be confused with simulation framework for testing
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OSGi component framework
> Widely used in many fields of industry
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Spring DM extension of the OSGi
> Simplification of the development process
Simulation Framework for Component Testing
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A simulation framework designed using SpringDM
for testing of real components
> No need for creation of models of the tested components
> Testing of OSGi components
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Framework also constructed from components
> Modularity of the framework
> Easy to change the features of the simulation
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Implementation of the simulation framework
> Tomáš Kabíček and Matěj Prokop as two master thesis
Framework – Types of Components
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Components of the framework
> Components necessary for functionality of the framework
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Real tested components
> Components to be tested in the simulation framework
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Simulated components
> Components for providing of the services required by the real
tested components
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Intermediate components
> Components for mediating of the services between two real tested
components
Framework – Types of Components
Framework – Features I
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Possible to test one or more real components in
simulation environment
> Services required by the real tested components provided by
other real components or simulated components
> All services invocations managed by the simulation framework
using event calendar without necessity of deprecated methods
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Depiction of components
> Three variously detailed variants, automated components layout
> Depiction of the simulation run by components highlighting and
depiction of the events in the calendar
Framework – Features II
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Logging of all events of the simulation run into a
text file
> Logged all events, similar to the depiction of the calendar, but
more detailed
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Simulation scenarios described in XML files
> Description of the components and their types
> Description of external events in the simulation run
> Description of the behavior of the simulated components (in
separate XML files)
Framework – Real/Simulated Components
Framework – Real/Real Components
Framework – Restrictions and Issues
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Restriction
> Only for OSGi/SpringDM components
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Issues
> No collections of statistics/results aside the log
> Only one simple case study implemented, many aspects not
tested
> No handling of system time calls, remote services etc.
Framework – Live Demonstration
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Demonstration of the simple case study directly in
the simulation framework
Future Work
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Implementation of a component for statistics
collections
> As a master thesis of a student
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Testing of two more advanced case studies
> File manager
> Traffic crossroad
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Solving of issues
> Handling of system time calls and remote connections
Thank you for your attention
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Questions?