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

A large library of useful functions

import { unescapePython } from './unescape-python.ts';
import { space } from './unicode.ts';

describe('unescapePython', () => {
  test('should unescape standard sequences', () => {
    expect(unescapePython('\\a\\b\\f\\n\\r\\t\\v\\\\\\\'\\"')).toBe('\u0007\b\f\n\r\t\v\\\'"');
  });

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

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

  test('should unescape hex', () => {
    expect(unescapePython('\\x00')).toBe('\0');
    expect(unescapePython('\\x000')).toBe('\u00000');
    expect(unescapePython('\\x0000')).toBe('\u000000');
  });

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

  test('should unescape extended unicode', () => {
    expect(unescapePython('\\U00000000')).toBe('\0');
    expect(unescapePython('\\U000000000')).toBe('\u00000');
    expect(unescapePython('\\U00000000X')).toBe('\0X');
  });

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

  test('does not support N', () => {
    expect(() => unescapePython('\\N')).toThrow('N escape is not supported.');
  });
});