import { assert, UnitTest } from '@ephox/bedrock';
import * as PositionArray from 'ephox/polaris/api/PositionArray';
import * as Strings from 'ephox/polaris/api/Strings';
import * as Parrays from 'ephox/polaris/test/Parrays';

UnitTest.test('api.PositionArray.splits', function () {
  const subdivide = function (unit: Parrays.PArrayTestItem, positions: number[]) {
    const tokens = Strings.splits(unit.item(), positions);
    return Parrays.make(tokens);
  };

  const check = function (expected: string[], input: string[], positions: number[]) {
    const parray = Parrays.make(input);
    const actual = PositionArray.splits(parray, positions, subdivide);
    assert.eq(expected, Parrays.dump(actual));
  };

  check([], [], []);
  check([ '0->2@ ha' ], [ 'ha' ], []);
  check([ '0->5@ hallo', '5->14@ hallobalo' ], [ 'hallo', 'hallobalo' ], []);
  check([
    '0->1@ h',
    '1->2@ a',
    '2->3@ l',
    '3->5@ lo',
    '5->6@ h',
    '6->9@ all',
    '9->11@ ob',
    '11->13@ al',
    '13->14@ o'
  ], [ 'hallo', 'hallobalo' ], [ 1, 2, 3, 6, 9, 11, 13 ]);
});