/* Copyright 2017 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { isDestArraysEqual, isDestHashesEqual } from '../../web/pdf_history';

describe('pdf_history', function() {
  describe('isDestHashesEqual', function() {
    it('should reject non-equal destination hashes', function() {
      expect(isDestHashesEqual(null, 'page.157')).toEqual(false);
      expect(isDestHashesEqual('title.0', 'page.157')).toEqual(false);
      expect(isDestHashesEqual('page=1&zoom=auto', 'page.157')).toEqual(false);

      expect(isDestHashesEqual('nameddest-page.157', 'page.157')).
        toEqual(false);
      expect(isDestHashesEqual('page.157', 'nameddest=page.157')).
        toEqual(false);

      let destArrayString = JSON.stringify(
        [{ num: 3757, gen: 0, }, { name: 'XYZ', }, 92.918, 748.972, null]);
      expect(isDestHashesEqual(destArrayString, 'page.157')).toEqual(false);
      expect(isDestHashesEqual('page.157', destArrayString)).toEqual(false);
    });

    it('should accept equal destination hashes', function() {
      expect(isDestHashesEqual('page.157', 'page.157')).toEqual(true);
      expect(isDestHashesEqual('nameddest=page.157', 'page.157')).toEqual(true);

      expect(isDestHashesEqual('nameddest=page.157&zoom=100', 'page.157')).
        toEqual(true);
    });
  });

  describe('isDestArraysEqual', function() {
    let firstDest = [{ num: 1, gen: 0, }, { name: 'XYZ', }, 0, 375, null];
    let secondDest = [{ num: 5, gen: 0, }, { name: 'XYZ', }, 0, 375, null];
    let thirdDest = [{ num: 1, gen: 0, }, { name: 'XYZ', }, 750, 0, null];
    let fourthDest = [{ num: 1, gen: 0, }, { name: 'XYZ', }, 0, 375, 1.0];
    let fifthDest = [{ gen: 0, num: 1, }, { name: 'XYZ', }, 0, 375, null];

    it('should reject non-equal destination arrays', function() {
      expect(isDestArraysEqual(firstDest, undefined)).toEqual(false);
      expect(isDestArraysEqual(firstDest, [1, 2, 3, 4, 5])).toEqual(false);

      expect(isDestArraysEqual(firstDest, secondDest)).toEqual(false);
      expect(isDestArraysEqual(firstDest, thirdDest)).toEqual(false);
      expect(isDestArraysEqual(firstDest, fourthDest)).toEqual(false);
    });

    it('should accept equal destination arrays', function() {
      expect(isDestArraysEqual(firstDest, firstDest)).toEqual(true);
      expect(isDestArraysEqual(firstDest, fifthDest)).toEqual(true);

      let firstDestCopy = firstDest.slice();
      expect(firstDest).not.toBe(firstDestCopy);

      expect(isDestArraysEqual(firstDest, firstDestCopy)).toEqual(true);
    });
  });
});