jest-livescript

package.json

{
  "scripts": {
    "test":"jest"
  },
  "dependencies": {
    "LiveScript": "*",
    "jest-cli": "^0.1.18"
  },
  "jest": {
    "scriptPreprocessor": "preprocessor.js",
    "testFileExtensions": ["ls", "js"]
  }
}

sum-test.ls

jest.dontMock '../sum.ls'

describe 'sum', (,) ->
  it 'adds 1 + 2 to equal 3', ->
    sum = require '../sum.ls'
    expect(sum 1,2).toBe 3

sum.ls

sum = (a, b) -> a + b

module.exports = sum