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Fable Jest Template

This template can be used to generate a simple testing app with Fable and Jest.

You can find more templates by searching Fable.Template packages in Nuget.

Requirements

npm comes bundled with node.js, but we recommend to use at least npm 5. If you have npm installed, you can upgrade it by running npm install -g npm.

Although is not a Fable requirement, on macOS and Linux you'll need Mono for other F# tooling like Paket or editor support.

Installing the template

In a terminal, run dotnet new -i Fable.Template.Jest to install or update the template to the latest version.

Creating a new project with the template

In a terminal, run dotnet new jest -lang F# to create a project in the current directory. Type dotnet new jest -n MyApp -lang F# instead to create a subfolder named MyApp and put the new project there.

The project will have the name of the directory. You may get some issues if the directory name contains some special characters like hyphens

Building and running the app

  • Install JS dependencies: npm i
  • Install F# dependencies: dotnet restore
  • Run the tests dotnet fable npm-run test
  • Run the tests and output code coverage dotnet fable npm-run coverage
  • Run the tests in watch mode:
    • In one terminal dotnet fable start
    • In a second terminal npm run test-watch
      • This will allow you to run all, or just a subset of tests, and will re-test the changed files on save.