Poltergeist
Ruby Tests Profiling Toolbox
Poltergeist | Ruby Tests Profiling Toolbox | |
---|---|---|
2 | 7 | |
2,546 | 1,793 | |
- | 0.6% | |
0.0 | 7.8 | |
over 5 years ago | 8 days ago | |
Ruby | Ruby | |
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.
Poltergeist
-
Stripe Financial Connections
Hostile integrations using scripts to obtain financial data is trivial. Frameworks such as:
https://github.com/teampoltergeist/poltergeist
is an excellent example of such a framework. Implementing "bank drivers" using such frameworks would not be difficult.
Plaid and others seem to have done an awesome job scaling the hostile integration pattern. However, the idea that Stripe decided to build this in-house rather than rely on Plaid is perfectly reasonable.
After all, the tools to implement such a product are well known.
-
Migrating Selenium system tests to Cuprite
In our project, we’ve been running system tests (then called rather "Feature tests") since around 2016. System tests use a real browser in the background and test all layers of a Rails application at once: from the database all the way up to the nuances of JavaScript loaded together with the web pages. Back then, we wrote our system tests using Capybara with Poltergeist, a driver that ran a headless Phantom JS browser. Since this browser stopped being actively developed, we migrated our test suite to the Selenium / Webdriver wrapper around Chrome browser around ~2018. Chrome was itself fine for tests automation but the Selenium API was quite limited and we had to rewrite several Poltergeist features using 3rd party gems and tools.
Ruby Tests Profiling Toolbox
-
Must-have gems for mature Rails
gem "test-prof" - https://github.com/test-prof/test-prof | Toolkit for inspecting and optimising your test-suite, a must-have.
-
Measuring load time on fixtures
You might be able to do something with https://test-prof.evilmartians.io, but I'm not sure it has anything specific to fixtures out of the box. Maybe using the event profiler on sql.active_record events would be close enough. In the limit, you could wire together your own ActiveSupport::Notifications.instrument around the relevant blocks + an ActiveSupport::Notifications.subscribe to that event so as to log the relevant information. Docs: https://api.rubyonrails.org/classes/ActiveSupport/Notifications.html
-
How to optimize factory creation.
To have a better vision of what objects are created in our spec file we can use test-prof, a powerful gem that provides a collection of different tools to analyse your test suite performance. One of this tool is really useful to identify a factory cascade, let’s introduce factory profiler.
-
A Trick For Reading Flamegraphs
TestProf can be used to get flamegraphs for Ruby test suites.
- How to improve a test suit made with Rspec, Capybara, FactoryBot and Siteprism
-
Does pytest break a lot of coding rules?
Rspec has spec_helper.rb.
-
Learning resources to broaden the knowledge
I also love the test-prof documentation, there's a lot of good ideas on how to improve test performance.
What are some alternatives?
Selenium WebDriver - A browser automation framework and ecosystem.
DuckRails - Development tool to mock API endpoints quickly and easily (docker image available)
Watir - Watir Powered By Selenium
Spinach - Spinach is a BDD framework on top of Gherkin.
capybara-webkit
minitest - minitest provides a complete suite of testing facilities supporting TDD, BDD, mocking, and benchmarking.
Fix - Specing framework.
timecop - A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.
API Taster - A quick and easy way to visually test your Rails application's API.
factory_bot - A library for setting up Ruby objects as test data.
TapReportParser - TAP Report Parser
faker - A library for generating fake data such as names, addresses, and phone numbers.