Book Image

Software Test Design

By : Simon Amey
Book Image

Software Test Design

By: Simon Amey

Overview of this book

Software Test Design details best practices for testing software applications and writing comprehensive test plans. Written by an expert with over twenty years of experience in the high-tech industry, this guide will provide you with training and practical examples to improve your testing skills. Thorough testing requires a thorough understanding of the functionality under test, informed by exploratory testing and described by a detailed functional specification. This book is divided into three sections, the first of which will describe how best to complete those tasks to start testing from a solid foundation. Armed with the feature specification, functional testing verifies the visible behavior of features by identifying equivalence partitions, boundary values, and other key test conditions. This section explores techniques such as black- and white-box testing, trying error cases, finding security weaknesses, improving the user experience, and how to maintain your product in the long term. The final section describes how best to test the limits of your application. How does it behave under failure conditions and can it recover? What is the maximum load it can sustain? And how does it respond when overloaded? By the end of this book, you will know how to write detailed test plans to improve the quality of your software applications.
Table of Contents (21 chapters)
Part 1 – Preparing to Test
Part 2 – Functional Testing
Part 3 – Non-Functional Testing
Appendix – Example Feature Specification


Stress testing puts all your skills as a tester to use: you need to identify all your system’s functions: black-box and white-box testing and all the error cases that can occur, as well as using all the visibility you put in place from monitoring and logging, the degradations from destructive testing, and all the tools from load testing.

With all those tools in place, you can perform tests specific to stress testing. We saw how tests could breach transaction rates with policed and unpoliced limits. We considered the performance of the code, either deliberately handling excessive operations with graceful degradation or suffering from stress-related failures, such as positive feedback loops.

Loading on your system can take different forms – with soak testing over long periods or spikes of load, which can be mitigated with queues. Excess loading can also be caused by limiting system resources, which introduces its own class of issues, as does introducing realistic...