@yoroi/common/lib/module/utils/arrays.test.js

The Common package of Yoroi SDK

"use strict";

import { difference, first, intersection } from './arrays';
describe('Array Utils', () => {
  describe('difference', () => {
    it('should return the difference of two arrays', () => {
      const a = [1, 2, 3, 4, 5];
      const b = [2, 4, 6, 7];
      const result = difference(a, b);
      expect(result).toEqual([1, 3, 5]);
    });
    it('should return an empty array when all elements are common', () => {
      const a = [1, 2, 3];
      const b = [1, 2, 3];
      const result = difference(a, b);
      expect(result).toEqual([]);
    });
    it('should return the first array when the second array is empty', () => {
      const a = [1, 2, 3];
      const b = [];
      const result = difference(a, b);
      expect(result).toEqual(a);
    });
  });
  describe('intersection', () => {
    it('should return the intersection of two arrays', () => {
      const a = [1, 2, 3, 4, 5];
      const b = [2, 4, 6];
      const result = intersection(a, b);
      expect(result).toEqual([2, 4]);
    });
    it('should return an empty array when there is no common element', () => {
      const a = [1, 3, 5];
      const b = [2, 4, 6];
      const result = intersection(a, b);
      expect(result).toEqual([]);
    });
    it('should return an empty array when one or both arrays are empty', () => {
      const a = [];
      const b = [2, 4, 6];
      const result = intersection(a, b);
      expect(result).toEqual([]);
    });
  });
  describe('predicates', () => {
    it('first', () => {
      expect(first()).toBe(true);
    });
  });
});
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