How do I run elm-test in Elm 0.19?
Submitted by Bill St. Clair on Mon, 17 Sep 2018 00:24:33 GMT
This is a FAQ, so I'm making a blog post to answer it.
elm-test is still in beta for Elm 0.19. To install it:
$ npm install -g elm-test@beta
The tests directory no longer needs an elm-package.json file (nor does it need elm.json).
Your top-level elm.json file needs to include the following:
"test-dependencies": {
"elm-explorations/test": "1.0.0 <= v < 2.0.0"
}The easiest way to get it there is with elm-test itself. The following will create a tests directory, containing an example test file, Example.elm, and will add test-dependencies to elm.json.
$ elm-test init
That's it. There is not yet support for running elm-test in the browser, nor is there support for testing DOM output.
billstclair/elm-localstorage is configured with a tests directory to test its JSON encoders and decoders: github.com/billstclair/elm-localstorage. To run the tests:
$ git clone git@github.com:billstclair/elm-localstorage.git $ cd elm-localstorage $ elm-test
