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

Gray-box testing

In this chapter, I have drawn a hard distinction between black-box testing with no knowledge of the code and its architecture versus white-box testing with full access. In practice, that is neither realistic nor desirable. Some code architecture will be obvious even to casual users – an app is connecting to servers, for instance, or different development teams work on separate parts of the application, so the code is never truly black-box. Then you can proceed through levels of detail. Testers without coding experience can still understand the system’s architecture, its modules, states, and transitions, which can be sketched as block diagrams. Beyond that, you can follow the flow of the functions, and finally, you can step through the code line by line.

Each level provides useful extra information; you can go as deep as time and your coding skills will allow.

In a complex, multi-layered system, for instance, it can be tempting to raise bugs against...