Book Image

Blockchain with Hyperledger Fabric - Second Edition

By : Nitin Gaur, Anthony O'Dowd, Petr Novotny, Luc Desrosiers, Venkatraman Ramakrishna, Salman A. Baset
Book Image

Blockchain with Hyperledger Fabric - Second Edition

By: Nitin Gaur, Anthony O'Dowd, Petr Novotny, Luc Desrosiers, Venkatraman Ramakrishna, Salman A. Baset

Overview of this book

Blockchain with Hyperledger Fabric - Second Edition is a refreshed and extended version of the successful book on practical Hyperledger Fabric blockchain development. This edition includes many new chapters, alongside comprehensive updates and additions to the existing ones. Entirely reworked for Hyperledger Fabric version 2, this edition will bring you right up to date with the latest in blockchain. Using a real-world Trade Finance and Logistics example, with working code available on GitHub, you’ll really understand both how and why Hyperledger Fabric can be used to maximum effect. This book is your comprehensive guide and reference to explore and build blockchain networks using Hyperledger Fabric version 2. This edition of the book begins by outlining the evolution of blockchain, including an overview of relevant blockchain technologies. Starting from first principles, you’ll learn how to design and operate a permissioned blockchain network based on Hyperledger Fabric version 2. You will learn how to configure the main architectural components of a permissioned blockchain network including Peers, Orderers, Certificate Authorities, Channels, and Policies. You’ll then learn how to design, develop, package, and deploy smart contracts, and how they are subsequently used by applications. This edition also contains chapters on DevOps, blockchain governance, and security, making this your go-to book for Hyperledger Fabric version 2.
Table of Contents (18 chapters)
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Testing considerations for the trade network

So far in this chapter, we have focused on setting up the various artifacts to protect our code base. However, we have not covered one key element of a pipeline: providing a proper set of tests to ensure the resiliency of our solution. In this section, we will look into some of the key aspects of the testing that went into the trade network.

We will limit our focus to the trade smart contract and the exporter rest gateway, which are written in TypeScript/JavaScript. However, these concepts extend to the Java components of the solution.

Unit testing

If the smart contracts define the rules of the network, then surely the unit tests are the guardians of those rules. Well-written unit tests effectively coerce source code into delivering the business intent. The challenge is in developing quality tests that properly validate the behavior of the system while being easy to maintain and resilient to change.

We say resilient to changes...