@technobuddha/library/src/escape-java.test.ts

A large library of useful functions

import { escapeJava } from './escape-java.ts';
import { space } from './unicode.ts';

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

  test('should escape nul as \\0, unless followed by an octal digit', () => {
    expect(escapeJava('\0')).toBe('\\0');
    expect(escapeJava('\0X')).toBe('\\0X');
    expect(escapeJava('\u00000')).toBe('\\0000');
  });

  test('should not escape most ascii', () => {
    expect(escapeJava(space)).toBe(space);
    expect(escapeJava('ABCdef[~]')).toBe('ABCdef[~]');
  });

  // cspell:ignore unnnn
  test('should escape non printables as \\unnnn', () => {
    expect(escapeJava('\u0001')).toBe('\\u0001');
    expect(escapeJava('\u001f')).toBe('\\u001f');
    expect(escapeJava('\u007f')).toBe('\\u007f');
    expect(escapeJava('\u00a0')).toBe('\\u00a0');
  });

  test('should mot escape latin-1 characters', () => {
    expect(escapeJava('¡¢£ýþÿ')).toBe('¡¢£ýþÿ');
  });

  test('should unicode escape BMP characters', () => {
    // cspell:ignore ΑΒΓΔΕΖ
    expect(escapeJava('ΑΒΓΔΕΖ')).toBe('\\u0391\\u0392\\u0393\\u0394\\u0395\\u0396');
  });

  test('should encode astral characters should be UTF-16 encoded', () => {
    expect(escapeJava('😀😁😂😺😸😹')).toBe(
      '\\ud83d\\ude00\\ud83d\\ude01\\ud83d\\ude02\\ud83d\\ude3a\\ud83d\\ude38\\ud83d\\ude39',
    );
  });
});