A Guide to Successful Unit Testing
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A Guide to Successful Unit Testing

For your next embedded project, here is a guide to getting the right results from your unit tests.

About the Book

This book will guide you through the concept of applying unit tests to your project. It starts by showing why unit test is not only needed, but why it will help your project as a whole to succeed. It also touches on good software engineering concepts which unit test is a key part of.

This book will guide you to look for the key indicators on code that is tested correctly, also on indicators that your code is behaving correctly. So when it is integrated into the rest of your software, you will be confident that any errors in that code is minimised.

This book is tool agnostic, and will provide a list of characterstics to look during your tool selection.

This book will show several strategies on how embedded system code can be tested using mock objects.

About the Author

Tehn Yit Chin
Tehn Yit Chin

Tehn Yit has been working in the embedded space since graduating from RMIT University in 1992, creating code from the small 8bit 8051 to a multicore PowerPC. Over those years, he has seen many software development processes. This exposure has given him a good sense on what is good and what is bad.

In his current role as a lead software engineer, he is passionate in delivering reliable, robust and low risk software. He believes that the good tooling is a corner stone to achieving the target. 

Table of Contents

  • Introduction
    • Why am I writing this book
    • Who should read this book
    • I am assuming this about you
    • How to use this book
    • Thank you
    • Going Forward
  • Basic Concepts
    • Software module
    • Mocks
    • Correct behaviour of a software module
    • Requirements
    • Version Control
    • Coverage
  • Tools
    • Automatic Stub generator
    • Debugging the software module
    • Tool Langauge
    • Metric collecting and logging
    • Integration
    • Maturity of the framework
  • Lets start testing
    • Requirements
    • Design of the PWM interface
    • Test Case Design for init_pwm_if()
    • Getting access to internal variables
    • Test Script for init_pwm_if()
    • Building the code
    • Test coverage
    • Getting better coverage
  • Testing Low Level Code
    • Mocking the hardware
    • Dealing with interrupts
    • Accessing external memory
    • Dealing with watchdog driver
  • Reporting of the results
    • What is in a test report?
    • Test report generation

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