This is a tiny application that illustrates how to run acceptance tests in milliseconds.
A test can be represented by a block that can be connected via a particular interface:
Various parts of the application as well as additional test code implement this interface/contract:
There are three kinds of blocks:
- Green blocks represent test code
- Blue blocks represent application code
- Pink blocks represent infrastructure
Tests can be connected to the top of any stack of blocks and test different assemblies of the application.
A tall stack of blocks gives more confidence at the cost of speed.
The speed doesn't depend directly on the number of blocks, but rather on the amount of I/O happening between each block and the amount of CPU processing happening inside each block.
npm install
Although this repository is intended as a demonstration of a design pattern, we want it to be as realistic as possible. So ideally you should use a database that you might use in production, like the instance we deployed with a postgres database.
If you have Postgres installed you can use that. Otherwise you can use SQlite (this is simpler as it does not require a separate installation):
createdb todo-subsecond
# Linux/OSX:
export DATABASE_URL=sqlite:./todo-subsecond.sqlite
# Windows:
set DATABASE_URL=sqlite:./todo-subsecond.sqlite
Run all the tests in a single command:
# Linux/OSX:
features/run/all
# Windows:
features\run\all
Or just one assembly at a time:
# Linux/OSX:
features/run/memory
# Windows:
features\run\memory
The webdriver-* assemblies will use Chrome by default. You can change to another browser if you want:
# Linux/OSX:
brew install geckodriver
export SELENIUM_BROWSER=firefox
# Windows:
set SELENIUM_BROWSER=firefox
npm start