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Michael C. Feathers
The average book on Agile software development describes a fairyland of greenfield projects, with wall-to-wall tests that run after every few edits, and clean & simple source code.
The average software project, in our industry, was written under some aspect of code-and-fix, and without automated unit tests. And we can't just throw this code away; it represents a significant effort debugging and maintaining. It contains many latent requirements decisions. Just as Agile processes are incremental, Agile adoption must be incremental too. No more throwing away code just because it looked at us funny.
Mike begins his book with a very diplomatic definition of "Legacy". I'l skip ahead to the undiplomatic version: Legacy code is code without unit tests.
Before cleaning that code up, and before adding new features and removing bugs, such code must be de-legacified. It needs unit tests.
To add unit tests, you must change the code. To change the code, you need unit tests to show how safe your change was.
The core of the book is a cookbook of recipes to conduct various careful attacks. Each presents a particular problem, and a relatively safe way to migrate the code towards tests.
Code undergoing this migration will begin to experience the benefits of unit tests, and these benefits will incrementally make new tests easier to write. These efforts will make aspects of a legacy codebase easy to change.
It's an unfortunate commentary on the state of our programming industry how much we need this book.
* *PHP has exploded in popularity, and is now starting to make inroads into large-scale business-critical Web systems *So far, little has been written about how to scale PHP applications to the enterprise level *Schlossnagle fills this void, providing the definitive guide to developing PHP applications for performance, stability, and extensibility
Sebastian Bergmann, Stefan Priebsch
Using real case studies from well-known companies and their PHP experts, the book presents the planning, execution, and automation of tests for the different layers and tiers of a Web software architecture, the measuring of software quality by means of software metrics, as well as establishing successful development processes and methods such as continuous integration, all in real-world scenarios. Different opinions are offered on how problems are solved to give the readers not "one single truth" but provide different approaches to problems and views on issues. There are three types of case study chapters: Enterprise Case Studies (How does company X implement their QA process?)Digg, OXID eSales, studiVZ, swoodoo Open Source Project Case Studies (How does project Y implement their QA process?) Typo3, eZ Components, Symfony, Zend Framework Case Studies that explain the implementation of a certain process or usage of a tool: Unit Testing Bad Practices, Performance Testing, Testing Database Interaction, Continuous Integration with phpUnderControl Experts presenting the case studies include: Brian Shire, Facebook's lead for PHP Internals and a developer for the Alternative PHP Cache Michel Lively, Jr. Lead PHP Developer for Selling Source, LLC. Robert Lemke and Kaarsten Dambekalns, core developers of TYPO3 and FLOW3 Fabien Potencier, CEO of Sensio and lead developer of Symfony Matthew Weir O'Phinney, Project Lead for the Zend Framework
This is a step-by-step tutorial for developing web applications using Yii. This book follows the test-first, incremental, and iterative approach to software development while developing a project task management application called "TrackStar". If you are a PHP programmer with knowledge of object oriented programming and want to rapidly develop modern, sophisticated web applications, then this book is for you. No prior knowledge of Yii is required to read this book.
Each chapter focuses on one topic, such as version control or debugging. After initially discussing essential concepts, the author takes an in-depth look at one or more tools relevant to the topic. Sample projects and plenty of well-documented code are used to work through practical application of the concepts. This book has been written for professional developers new to PHP and experienced PHP developers who want to take their skills to the next level by learning enterprise-level tools and techniques.