The Grumpy Programmer's Guide To Testing PHP Applications
The Grumpy Programmer's Guide To Testing PHP Applications
16 years of testing advice to help you learn to test your PHP code no matter what framework you use
About the Book
I’ve been trying to help people test their PHP code for a very long time, probably before some of you reading this even got started in programming. PHPUnit didn’t exist, the most commonly-used version of PHP was 5.0, and social media wasn’t a thing. GMail had just started being used. My first search engine was Altavista. Yes, I learned to test uphill, both ways, in the snow.
I feel that testing, as a concept, is hard to explain to beginning programmers: “we are going to write code that is going to make sure your other code works as expected”. The assumption that underlies all this is that you already understand how to write computer programs in your chosen language! This makes it very difficult to teach to beginner or inexperienced programmers. When you combine this with how PHP does not force any particular structure on you, you have an environment where only the folks who are really motivated end up learning about testing.
The Grumpy Programmer's Guide To Testing PHP Applications is my way to try and provide some help for developers who are looking to become more test-centric and reap the benefits of automated testing and related tooling like static analysis and automation. I believe that by learning the skills (both technical and core) surrounding testing you will be able to write tests using almost any testing framework and almost any PHP application.
The book combines all the material from my previous books, adds new material, and revisits some old topics where my experiences have changed my thoughts. I break the vast topic of testing into smaller chunks, along with providing lots of examples and explanations of how I approach testing applications. Some of the things I cover are:
- Test-Driven development
- Strategies for Test-After practices
- Test refactoring strategies
- How PHPUnit itself works
- Complementary tools and approaches like static analysis and mutation testing
- Learning the core skills you need to get other people testing their code
The Grumpy Programmer's Guide To Testing PHP Applications is designed to be the book you refer to over and over again to not only learn how to test your PHP applications but to also remind yourself about techniques and tools that lead to successful outcomes. All I've ever wanted to do is get more people testing their code so we can concentrate on solving problems instead of constantly fixing bugs that we might've caught earlier.
Changing How We Think About Tests
- It’s A Funnel, Not A Pyramid.
- Customer Tests and Developer Tests
What Are Tests?
- Manual Tests
- Semi-Automated Tests Using Real Dependencies
- Semi-Automated Tests Using Test Doubles
- Automated Tests
- Final Thoughts
How PHPUnit Works
- High-Level Overview
- How Do We Install PHPUnit?
- The PHPUnit Test Runner
- PHPUnit Test Cases
- What Is a Test Double?
- Test Stub
- Mock Objects and Test Spies
- Final Thoughts
Test-Driven Development by Example
- Getting Started
- First Test
- Next Test
- Building Further Test Cases
- Refactoring The Tests
- Handling Non-Valid Input
- Final Thoughts
Test-After Development by Example
- What’s the Difference?
- What Is the Expected Behavior?
- How Am I Going to Test This?
- Refactoring Helpers
- Response Validation
- API Schema Validation
- Why You Should Use Data Providers
- Look at All Those Tests
- Creating Data Providers
- More Complex Examples
- Data Provider Tricks
- Final Thoughts
- Wrappers From Up High
- Mature Testing Tools Are Available
- Open Source Drives Acceptance
- Proof Exists to Back the Promises
- Testing Moves Bug Fixing to a Cheaper Part of the Cycle
- Well-Documented Build Systems Encourage Continuous Deployment
- There Are Awesome Complementary Tools
Building a Testing Culture
- Primary Goal
- Tests as First Class Components
- Tests for Bugs
- Tests for New Features
- Tests for Refactoring
- Commitment to Peer Review
- Consistency in Development Environments
- Automation Is Your Friend
- Same Languages and Tools
- Same Practices
- Test Environment Bootstrapping
- Auto-Wiring Bootstrapping
No Tests? No Problem!
- How Did We End Up Without Any Tests?
- Bug Fixes Need Proof
- New Features Require Proof
- Test Suites Are Not Bulletproof
Nobody Is Running the Tests!
- Time Pressure
- Tests Are Too Slow
- Monolithic Bootstrapping
- Shared Testing Environments
- Testing Is Part of the Job
- Lost Opportunity Costs
It’s About People
- Like Kids on a Playground
- Lack of Good Docs
- Convincing People About Time
- Cowboys Above Me
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