Sela

Testing the Internet of Things (IoT) – An Exploratory Workshop

Description
There is an increasing amount of publicity, information and hype around the subject of the Internet of Things (IoT) and the Internet of Everything (IoE). What on earth are people talking about? Should I be interested? Will it affect me? What does it mean to me as a tester? In this workshop, Paul will explore the scope, range, architecture, complexity and challenges of testing an IoT system. Standards are emerging, and many commercial applications are bleeding edge, speculative or exploratory. Security and privacy dominates all of the concerns being articulated by industry commentators, but for non-trivial systems, significant functional and integration complexity challenges must also be overcome. There are also broader societal risks that the IoE brings and government, companies and individuals should pay attention to them. The architecture of the IoE is beginning to reveal itself and this exploratory session presents a seven-layer architectural model that will help you to make sense of it all and expose some of the technical risks we need to focus on as testers. Most of the concepts are explored through exercises and problem-solving. Some recommendations for formulating a test strategy for the Internet of Everything are presented.

Topics

Scope
Devices
Applications
7-layer Architecture
Mobile and the 7 layers
Exercise: How many connected devices in a typical house?
Measurement and sensors
Exercise: what can you measure?
Micro-controllers
Servos, actuators, motors
Relays, switches, stepping switches
Communications
Computers
Some example objects
Exercise: Invent an IoT application, become a billionaire
Internet communications
Local communications
Machine to machine communications
IP and other protocols
Registration, identification, control and upgrades
Exercise: Draw a stock control sensor register, post stock level sequence diagram
Open loop control systems
Closed loop/feedback control systems
Exercise: which are open and which are closed loop systems?
On/off, linear and proportional control
Delay, hysteresis and damping
Steering a ship, heating a house
Data collection, aggregation
Exercise: what could go wrong in the field?
Data filtering, smoothing
Interpolation, curve-fitting
Time-serial data, segmentation, clustering, change-points
Analytics
Use and misuse
Data, analytics and risk
Exercise: what could go wrong in the analysis?
Network communications and carriers
Synchronous and asynchronous messaging
Conversations v publish and subscribe messaging
MQTT Overview, secure MQTT
Quality of Service
Secure communications
Exercise: What could go wrong with a messaging service?
Exercise: Test a publish and subscribe messaging service
HTTP/S, the web and web services
Payload formats: XML, JSON
Exercise: testing a webservice
Challenges: Scale, Complexity, Privacy, Security, Tools
Functional testing
Functional testing at scale – pattern-based test design
Modelling, Automation and Simulation

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