@technobuddha/library/src/unescape-js.test.ts

A large library of useful functions

import { unescapeJS } from './unescape-js.ts';
import { space } from './unicode.ts';

describe('unescapeJS', () => {
  test('should unescape standard sequences', () => {
    expect(unescapeJS('\\b\\f\\n\\r\\t\\v\\\\\\\'\\"')).toBe('\b\f\n\r\t\v\\\'"');
  });

  test('should support non-standard sequences', () => {
    expect(unescapeJS('\\j\\q\\z')).toBe('jqz');
  });

  test('should unescape octal', () => {
    expect(unescapeJS('\\0')).toBe('\0');
    expect(unescapeJS('\\00')).toBe('\0');
    expect(unescapeJS('\\000')).toBe('\0');
    expect(unescapeJS('\\0000')).toBe('\u00000');
  });

  test('should unescape hex', () => {
    expect(unescapeJS('\\x00')).toBe('\0');
    expect(unescapeJS('\\x00X')).toBe('\0X');
  });

  test('should unescape unicode', () => {
    expect(unescapeJS('\\u0000')).toBe('\0');
    expect(unescapeJS('\\u00000')).toBe('\u00000');
    expect(unescapeJS('\\u0000X')).toBe('\0X');
  });

  test('should unescape extended unicode', () => {
    expect(unescapeJS('\\u{0}')).toBe('\0');
    expect(unescapeJS('\\u{0}0')).toBe('\u00000');
    expect(unescapeJS('\\u{0}X')).toBe('\0X');
  });

  test('should return ASCII, Latin1, BMP and ASTRAL as-is', () => {
    expect(unescapeJS(space)).toBe(space);
    expect(unescapeJS('ABCabc[~]')).toBe('ABCabc[~]');
    expect(unescapeJS('abcdef')).toBe('abcdef');
    expect(unescapeJS('¡¢£ýþÿ')).toBe('¡¢£ýþÿ');
    // cspell:ignore ΑΒΓΔΕΖ
    expect(unescapeJS('ΑΒΓΔΕΖ')).toBe('ΑΒΓΔΕΖ');
    expect(unescapeJS('😀😁😂😺😸😹')).toBe('😀😁😂😺😸😹');
  });
});