Really enjoyed this article. Fascinating to see the resistance to testing back when he started, and how he used a bit of clever marketing to change the way people thought about it.

Interesting that he's very happy with

  expect(expected).to.equal(actual)

I wonder if `assert` or `check` or even `test` makes us think differently about what we're doing (in the assertion itself, not in the method name to set up the test).