import { Assert, UnitTest } from '@ephox/bedrock-client';

import * as PositionArray from 'ephox/polaris/api/PositionArray';
import * as Parrays from 'ephox/polaris/test/Parrays';

UnitTest.test('api.PositionArray.sublist', () => {
  const check = (expected: string[], input: string[], start: number, finish: number) => {
    const parray = Parrays.make(input);
    const actual = PositionArray.sublist(parray, start, finish);
    Assert.eq('', expected, Parrays.dump(actual));
  };

  check([], [], 0, 0);
  check([], [ 'this', 'is', 'it' ], 2, 5);
  check([
    '0->4@ this',
    '4->6@ is',
    '6->8@ it'
  ], [ 'this', 'is', 'it' ], 0, 8);

  check([], [ 'this', 'is', 'it' ], 1, 8);
  check([
    '0->4@ this',
    '4->6@ is'
  ], [ 'this', 'is', 'it' ], 0, 6);

  check([
    '4->6@ is'
  ], [ 'this', 'is', 'it' ], 4, 6);

  check([
    '4->6@ is',
    '6->8@ it'
  ], [ 'this', 'is', 'it' ], 4, 8);

  check([], [ 'this', 'is', 'it' ], 4, 9);
});