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Paper Abstract and Keywords
Presentation 2021-03-05 14:05
Model-Based Testing Environment Equipped with a Network Simulator
Kosuke Fukuda (Univ. of Tokyo), Yoshinori Tanabe (Tsurumi Univ.), Masami Hagiya (Univ. of Tokyo) KBSE2020-36
Abstract (in Japanese) (See Japanese page) 
(in English) The application of IoT devices is expanding. Model-based testing is one of the testing methods which fit well for IoT devices. In model-based testing, the model with which the system under test (SUT) interacts is expressed as an extended finite state machine and a testing tool like Modbat executes the model and checks its correctness. In our research, we extended Modbat's capability for IoT software testing.

First, we implemented a simulator of an MQTT broker in Modbat. This allows the simulation of networking over MQTT protocol to be performed coordinately with the virtual time in Modbat and enables faster testing of SUT. In addition, we made it possible to simulate the delay of the communication between devices using the simulator, which extends the range of testing. Along with those, we also improved a library of virtual-time scheduler so that it can also schedule tasks based on real time and that tasks can schedule tasks recursively. Finally, we introduced new libraries that allow the exploitation of Modbat functionalities also from SUT, like virtual-time speedup and networking simulation, with just a small modification of original SUT code, which consequently enables testing SUT by executing the SUT program as a thread running independently to Modbat.

With these improvements and new features, we conducted a case study on a simple drone controller program and observed their effectiveness.
Keyword (in Japanese) (See Japanese page) 
(in English) IoT / model-based testing / MQTT / virtual time / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 423, KBSE2020-36, pp. 13-18, March 2021.
Paper # KBSE2020-36 
Date of Issue 2021-02-26 (KBSE) 
ISSN Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF KBSE2020-36

Conference Information
Committee KBSE  
Conference Date 2021-03-05 - 2021-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To KBSE 
Conference Code 2021-03-KBSE 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Model-Based Testing Environment Equipped with a Network Simulator 
Sub Title (in English)  
Keyword(1) IoT  
Keyword(2) model-based testing  
Keyword(3) MQTT  
Keyword(4) virtual time  
1st Author's Name Kosuke Fukuda  
1st Author's Affiliation University of Tokyo (Univ. of Tokyo)
2nd Author's Name Yoshinori Tanabe  
2nd Author's Affiliation Tsurumi University (Tsurumi Univ.)
3rd Author's Name Masami Hagiya  
3rd Author's Affiliation University of Tokyo (Univ. of Tokyo)
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Speaker Author-1 
Date Time 2021-03-05 14:05:00 
Presentation Time 30 minutes 
Registration for KBSE 
Paper # KBSE2020-36 
Volume (vol) vol.120 
Number (no) no.423 
Page pp.13-18 
Date of Issue 2021-02-26 (KBSE) 

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