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

Failover testing

Some parts of your system may be resilient to specific points of failure, so a great place to start destructive testing is to ensure those failovers happen successfully.

Designing destructive testing requires detailed knowledge of your system’s architecture. Which elements interact with each other, and what is the failure mode for each of them? What classes of redundancy are used by the various parts of your system? Ensure you understand these workings and how your system should behave in failure cases.

Classes of redundancy

Redundant systems could include a pair of switches both capable of routing all the traffic, multiple web servers to which traffic can be sent, and database systems such as Cassandra that are capable of continuing when one node is down, among many others. Redundancy may be at the hardware or software level, although the approach and items to check are equivalent in both cases.

The important distinction for your testing is the...