Capybara
stimulus-use
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Capybara | stimulus-use | |
---|---|---|
20 | 9 | |
9,946 | 1,374 | |
0.3% | 3.5% | |
7.7 | 8.7 | |
1 day ago | 4 days ago | |
Ruby | JavaScript | |
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Capybara
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16 Best Ruby Frameworks For Web Development [2024]
Cuba takes help from a lot of other technologies to bring the best of everything. For example, the responses in Cuba are the optimized version of the Rack responses. The templates are integrated via Tilt and testing via Cutest and Capybara.
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đź©° Scheduling automated tests
I am going to use a browser based testing tool called Playwright (But you could use Capybara, or Selenium WebDriver etc.).
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Building GitHub with Ruby on Rails
Even as a much smaller team, building Heii On-Call [0] as a lightweight alerting/monitoring/on-call rotations SaaS based on Ruby on Rails has basically been a pleasure!
And as the article highlights, perhaps the key reason for smooth deployments and upgrades is that the CI testing story is so, so good: RSpec [1] plus Capybara [2] for us. That means we have decently extensive tests of just about all behavior. The few small Rails and Ruby upgrades we've done have gone quite smoothly and confidently, with usually just a few non-Rails gem dependencies needing to be manually updated as well.
The "microservices" story is where we've pulled in the Crystal programming language [3] to great effect. After dabbling with Go and Rust, we've found that Crystal is truly a breath of fresh air. Crystal powers the parts of Heii On-Call that need to be fast and low-RAM, specifically the inbound API https://api.heiioncall.com/ and the outbound HTTP(S) prober background processes. I've ported some shared utility classes from Ruby to Crystal almost completely by just copy-and-pasting ___.rb to ___.cr; porting the tests for those classes was far more onerous than porting the class code itself. (Perhaps another point of evidence toward the superiority of RoR's testing story...)
The front-end story is nice but just a bit weaker. Using Hotwire / Turbo successfully, but I have an open PR to fix a fairly obvious stale cache bug in Turbo [4] that has been sitting unloved for nearly a month, despite other users reporting the same issue. I'm hopeful that it will get merged in the next release, but definitely less active than the backend side.
For me, the key conclusion is that the excellent Ruby on Rails testing story is what enables everything to go a lot more smoothly and have such a strong foundation. I'd be curious if any GitHubbers can talk more about whether they too are using Rspec+Capybara or something else? Are there internal guidelines for test coverage?
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Minitest vs. RSpec in Rails
Since the Capybara library drives the underlying tests, Minitest also has the same syntax.
- Is it a common practice to test JS code in a browser instead of Node.js?
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From partials to ViewComponents: writing reusable front-end code in Rails
The nice thing about partial templates is that templates are unit-testable with View specs (or similarly in Minitest) and the rendered output can even be verified using Capybara matchers.
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Tip: if you're changing all your form_for to form_with, take the opportunity to make sure all forms are being tested.
To piggyback: This would be a type of browser test, so you would want to use something like Cypress (https://github.com/testdouble/cypress-rails) or Capybara (https://github.com/teamcapybara/capybara). RSpec has a good integration with Capybara. Cypress is JS-based so it will require some additional config.
- How to use undocumented web APIs
- Don't make me think, or why I switched to Rails from JavaScript SPAs
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The Benefits of Acceptance Testing
For instance, the acceptance test above requires a log in routine. Here's where the expressive power of a DSL like Capybara manifests:
stimulus-use
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A powerful search feature with what Rails provides out of the box
You can see that I added a dependency here: stimulus-use.
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Discover Symfony UX’s Twig Components. UI without JS or BS.
“stimulus-use: Add composable behaviors to your Stimulus controllers, like debouncing, detecting outside clicks and many other things.
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RVTWS: a Ruby stack for modern web apps
Actually, Stimulus is pretty cool because you can compose multiple pre-built behaviors into one Stimulus controller, for a sort of functional approach to component behaviors. The tradeoff is that a growing web of Stimulus controllers (plus HTML data attributes associated with them) can become complex and hard to understand.
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Tailwind style CSS transitions with StimulusJS
The stimulus-use project is a collection of reusable behaviors for Stimulus. If you are familiar with React, this project is similar to React’s hooks system, but for Stimulus controllers.
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Pagination and infinite scrolling with Rails and the Hotwire stack
To make using the IntersectionObserver API easier, we will add the wonderful stimulus-use package to our application. This is not a requirement, but it does simplify the code a bit.
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Upgrade to Stimulus 3, say bye to IE11, and celebrate 🎉
Finally, as we recently added the Stimulus-Use library to our project, we made sure to upgrade it to current beta which supports Stimulus 3.
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Migrating Selenium system tests to Cuprite
For example, we have a few ”live search“ fields, backed by back-end Fetch requests, on some pages. The live search function was usually triggered by the keyup event and Cuprite was such a fast typewriter that it frequently sent multiple requests almost at once. If some of the responses got a bit late or out of sync, the front-end JavaScript code began hitting issues. We solved this by adopting a technique called debouncing and, frankly, we should have done this since the beginning. By the way, we used the useDebounce module from the marvelous Stimulus-use library to achieve this.
What are some alternatives?
Playwright - Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.
Aruba - Test command-line applications with Cucumber-Ruby, RSpec or Minitest.
shoulda-matchers - Simple one-liner tests for common Rails functionality
Emoji-RSpec - Custom Emoji Formatters for RSpec
Cucumber - A home for issues that are common to multiple cucumber repositories
Bacon - a small RSpec clone
Spinach - Spinach is a BDD framework on top of Gherkin.
RSpec - RSpec meta-gem that depends on the other components
Howitzer - A Ruby-based framework for acceptance testing
cuprite - Headless Chrome/Chromium driver for Capybara
Konacha - Test your Rails application's JavaScript with the mocha test framework and chai assertion library
dropzone - Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.