test-inversion.js

var assert = require('assert')
var inversions = require('Inversions').inversions
var list = require('Data.List')

describe('The inversion counting function', function() {
  it('should find an inversion', function () {
    assert.equal(inversions(list.Cons.create(1)(list.Cons.create(2)(list.Cons.create(3)(list.Cons.create(4)(list.Nil.value))))), 0)
    assert.equal(inversions(list.Cons.create(2)(list.Cons.create(1)(list.Cons.create(3)(list.Cons.create(4)(list.Nil.value))))), 1)
  })
})