const test = require('tape')

const unitsToRanges = require('../lib/unitsToRanges.js')

test('units list to addr:flats', t => {
  t.same(
    unitsToRanges([]),
    null,
    'empty input returns empty output'
  )

  t.same(
    unitsToRanges(['1'], 100),
    '1',
    'single unit'
  )

  t.same(
    unitsToRanges(['1', '3']),
    '1;3',
    'two units without a range'
  )

  t.same(
    unitsToRanges(['1', '2']),
    '1-2',
    'two consecutive units form a range'
  )

  t.same(
    unitsToRanges(['1', '2', '3']),
    '1-3',
    'three consecutive units form a range'
  )

  t.same(
    unitsToRanges(['1', '2', '4']),
    '1-2;4',
    'range and singular'
  )

  t.same(
    unitsToRanges(['3', '1']),
    '1;3',
    'singular sorted'
  )

  t.same(
    unitsToRanges(['1', '2', '5', '4']),
    '1-2;4-5',
    'range sorted'
  )

  t.same(
    unitsToRanges(['1-2', '3-4']),
    '1-4',
    'accepted ranged input'
  )

  t.same(
    unitsToRanges(['1A', '2A']),
    '1A-2A',
    'with suffix'
  )

  t.same(
    unitsToRanges(['1A', '2A', '3']),
    '1A-2A;3',
    'partially with suffix'
  )

  t.same(
    unitsToRanges(['1A', '2B']),
    '1A;2B',
    'different suffix not merged'
  )

  t.same(
    unitsToRanges(['A1b', 'A2b']),
    'A1b-A2b',
    'prefix merged'
  )

  t.same(
    unitsToRanges(['A1b', 'C2d']),
    'A1b;C2d',
    'different prefix not merged'
  )

  t.end()
})