Everyday Rails Testing with RSpec (The Book: Latest Edition)
Everyday Rails Testing with RSpec
A practical approach to test-driven development
About the Book
Built a couple of Rails applications, but struggling with reliable test coverage? Does your application testing consist of clicking around in the browser, hoping you catch everything before your customers do?
It's a common experience for new Ruby on Rails developers! Testing and test-driven development are crucial, but many tutorials don't delve deeply into these components. In Everyday Rails Testing with RSpec, you'll learn tried-and-true techniques for writing clear, effective, maintainable tests in RSpec—in turn, building more trustworthy features for your customers, and saving countless hours refreshing your browser.
Translations
About the Author
Table of Contents
- Preface to this edition
- Acknowledgements
-
1. Introduction
- Confident testing
- Why RSpec?
- Who should read this book
- My testing philosophy
- How the book is organized
- Downloading the sample code
- Code conventions
- Discussion and errata
- A note about gem versions
- A note about styling
- About the sample application
-
2. Setting up RSpec
- Dependencies
- Test database
- RSpec configuration
-
The
rspecbinstub - Try it out!
- Summary
- Exercises
-
3. Model specs
- Anatomy of a model spec
- Creating a model spec
- The RSpec syntax
- Testing validations
- Testing instance methods
- Testing class methods and scopes
- Testing all the cases
- More about matchers
- Summary
- Exercises
-
4. DRY enough specs
- Describing contexts in RSpec
- DRYer test setup and teardown
- How DRY is too DRY?
- Summary
- Exercises
-
5. Creating meaningful test data
- Factories or fixtures?
- Installing factory_bot
- Adding factories to the application
- Generating unique data with sequences
- Associations in factories
- Using factories safely
- Summary
- Exercises
-
6. Testing controllers
- Basic request specs
- Testing user authentication
- Testing user authorization
- Testing user input
- Summary
- Exercises
-
7. Next level request specs
- Testing invalid user input
- Simplifying test data with factory_bot traits
- Testing non-HTML requests and responses
- Summary
- Exercises
-
8. Testing the user interface with system specs
- Why system specs?
- System spec dependencies
- A basic system spec
- Simulating browser interactions with Capybara
- Debugging system specs
- Testing JavaScript interactions
- System testing strategies
- Summary
- Exercises
-
9. More DRY testing techniques
- Support modules
-
Lazy-loading with
let - Shared contexts
- Custom matchers
- Aggregating failures
- Summary
- Exercise
-
10. Testing in isolation
- Mocks, stubs, doubles, fakes, and spies, defined
- Testing edge cases with mocks
- Simulating external systems
- Recording HTTP transactions with VCR
- Mocking methods in factories
- When mocking goes too far
- Summary
- Exercises
- 11. Testing the rest
- 12. Toward test-driven development
-
13. Parting advice
- Practice testing the small things
- Be aware of what you’re doing
- Short spikes are OK
- Write a little, test a little is also OK
- Try to write integration specs first
- Make time for testing
- Keep it simple
- Don’t revert to old habits!
- Use your tests to make your code better
- Sell others on the benefits of automated testing
- Keep practicing
- Goodbye, for now
- More testing resources for Rails
-
More testing resources for Rails
- RSpec
- Rails testing
- About Everyday Rails
- About the author
- Colophon
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