text: /**
   * The MIT License (MIT)
   *
   * Copyright (c) 2018-2019 Mickael Jeanroy
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  import {countBy} from '../../../src/core/common/count-by.js';
  
  describe('countBy', () => {
    it('should count elements in array', () => {
      const array = [2, 4, 6, 4];
      const iteratee = jasmine.createSpy().and.callFake((x) =>
        x.toString()
      );
  
      const counters = countBy(array, iteratee);
  
      expect(counters).toEqual({
        2: 1,
        4: 2,
        6: 1,
      });
  
      expect(iteratee).toHaveBeenCalledWith(2, 0, array);
      expect(iteratee).toHaveBeenCalledWith(4, 1, array);
      expect(iteratee).toHaveBeenCalledWith(6, 2, array);
      expect(iteratee).toHaveBeenCalledWith(4, 3, array);
    });
  });
  