const test = require('tape')
const helpers = require('./helpers')

const AST = require('../src/ast')
const OsloError = require('../src/osloError')

test('list function', t => {
  t.plan(1)

  const tree = helpers.evaluate('(list 1 2 3)')
  t.deepEqual(tree[0], new AST.List({
    elements: [
      new AST.Number({ value: 1, line: 1 }),
      new AST.Number({ value: 2, line: 1 }),
      new AST.Number({ value: 3, line: 1 }),
    ]
  }))
})

test('length function', t => {
  t.plan(2)

  let tree = helpers.evaluate('(length (list 1 2 3))')
  t.deepEqual(tree[0], new AST.Number({ value: 3 }))

  tree = helpers.evaluate('(length 5)')
  t.deepEqual(
    tree,
    new OsloError({
      line: 1,
      message: 'length: argument is not a list'
    })
  )
})