@akamfoad/qrcode/src/tests/QRCodeText.test.ts

The library is generating QR codes as SVG, HTML5 Canvas, PNG and JPG files, or text.

import { describe, expect, it, vi } from 'vitest';
import QRCodeText from '../QRCodeText';

describe('QRCodeText', () => {
  describe('constructor', () => {
    it('should use default params if nothing is provided', () => {
      // @ts-expect-error testing undefined case
      const qrCode = new QRCodeText();
      expect(qrCode.value).toBeUndefined();
      expect(qrCode.padding).toEqual(1);
      expect(qrCode.level).toEqual('L');
      expect(qrCode.typeNumber).toEqual(0);
      expect(qrCode.errorsEnabled).toBeFalsy();
      expect(qrCode.invert).toBeFalsy();
      expect(qrCode.blackSymbol).toEqual('▓▓');
      expect(qrCode.whiteSymbol).toEqual('  ');
    });

    it('should default params for not specified params', () => {
      const qrCode = new QRCodeText('test 42', { level: 'Q' });
      expect(qrCode.value).toEqual('test 42');
      expect(qrCode.padding).toEqual(1);
      expect(qrCode.level).toEqual('Q');
      expect(qrCode.typeNumber).toEqual(0);
      expect(qrCode.errorsEnabled).toBeFalsy();
      expect(qrCode.invert).toBeFalsy();
      expect(qrCode.blackSymbol).toEqual('▓▓');
      expect(qrCode.whiteSymbol).toEqual('  ');
    });

    it('should use specified params', () => {
      const qrCode = new QRCodeText('test 84', {
        level: 'H',
        padding: 0,
        typeNumber: 20,
        invert: true,
        errorsEnabled: true,
        blackSymbol: '1',
        whiteSymbol: '0',
      });
      expect(qrCode.value).toEqual('test 84');
      expect(qrCode.padding).toEqual(0);
      expect(qrCode.level).toEqual('H');
      expect(qrCode.typeNumber).toEqual(20);
      expect(qrCode.errorsEnabled).toBeTruthy();
      expect(qrCode.invert).toBeTruthy();
      expect(qrCode.blackSymbol).toEqual('1');
      expect(qrCode.whiteSymbol).toEqual('0');
    });
  });

  describe('_clearCache', () => {
    it('should clear qrCodeData and qrCodeText', () => {
      const qrCode = new QRCodeText('test');
      qrCode.qrCodeData = [[false], [true], [true], [false]];
      qrCode.qrCodeText = '1-2-3-4';
      qrCode._clearCache();
      expect(qrCode.qrCodeData).toBeNull();
      expect(qrCode.qrCodeText).toBeNull();
    });
  });

  describe('toString', () => {
    it('should return null if qrCodeData is empty', () => {
      const qrCode = new QRCodeText('test');
      qrCode.getData = vi.fn(() => null);
      expect(qrCode.toString()).toBeNull();
    });

    it('should return text QR code', () => {
      const qrCode = new QRCodeText('test');
      qrCode.getData = vi.fn(() => [
        [true, true, true, true, true],
        [true, false, false, false, true],
        [true, false, true, false, true],
        [true, false, false, false, true],
        [true, true, true, true, true],
      ]);
      expect(qrCode.toString()).toEqual(
        '▓▓▓▓▓▓▓▓▓▓\n▓▓      ▓▓\n▓▓  ▓▓  ▓▓\n▓▓      ▓▓\n▓▓▓▓▓▓▓▓▓▓\n',
      );
    });
  });
});