Get thee to a nullery: self-aware nulls for testing

April 11, 2012

Pryce and Freeman’s Growing object-oriented software is a good practical guide to test driven development, as you’d expect from the authors of jMock. It isn’t necessarily easy to adapt piecemeal — introducing end-to-end tests after the fact would require a lot of rewriting and probably introduce more problems than it would be worth assuming you… Read more

Pre-commit Tests

January 26, 2012

Keeping the trunk stable matters a lot at Wealthfront. We do continuous deployment, and when the build is broken our deployment chain stops. We have a flashing light in the office and a pre-commit hook which prevents any commit until the build is fixed. The best way to know if a commit would break the… Read more

Beyond Java’s Access Control: the Visibility Test

December 02, 2011

It is generally a good practice to use the most restrictive access level that makes sense. However, Java’s access control is not always as expressive as one would want. In this blog post, I am going to give two examples where an access level must be artificially relaxed. Then, I’ll describe Wealthfront’s recently open sourced… Read more

Watch my dev2ops video about Wealthfront’s engineering

April 14, 2011

Damon Edwards was kind enough to post his video of me giving my talk about Wealthfront at the dev2ops meetup at Enjoy!

Video Recording & Slides: Psychology of Testing by Misko Hevery

February 09, 2011

A few weeks ago, as part of our “Lean Startup for Geeks” series of talks, we hosted Miško Hevery. Miško, who has inspired countless engineers to test effectively, spoke about the Psychology of Testing. Enjoy his slides and a recording of his presentation! Check out our next talk in the “Lean Startup for Geeks” series… Read more

Test-driving your Javascript for fun and profit

January 31, 2011

With web-based UIs growing more complicated everyday, testing your Javascript code is just as vital as testing any other part of your stack. At Wealthfront we use jsTestDriver to provide test-coverage of our javascript code. We like its similarity to JUnit and the ease with which it integrates with Hudson. In this article we’ll drum… Read more