tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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validation.test.js (1488B)

      1 'use strict';
      2 
      3 const assert = require('assert');
      4 
      5 const { isValidUTF8 } = require('../lib/validation');
      6 
      7 describe('extension', () => {
      8  describe('isValidUTF8', () => {
      9    it('returns false if it finds invalid bytes', () => {
     10      assert.strictEqual(isValidUTF8(Buffer.from([0xf8])), false);
     11    });
     12 
     13    it('returns false for overlong encodings', () => {
     14      assert.strictEqual(isValidUTF8(Buffer.from([0xc0, 0xa0])), false);
     15      assert.strictEqual(isValidUTF8(Buffer.from([0xe0, 0x80, 0xa0])), false);
     16      assert.strictEqual(
     17        isValidUTF8(Buffer.from([0xf0, 0x80, 0x80, 0xa0])),
     18        false
     19      );
     20    });
     21 
     22    it('returns false for code points in the range U+D800 - U+DFFF', () => {
     23      for (let i = 0xa0; i < 0xc0; i++) {
     24        for (let j = 0x80; j < 0xc0; j++) {
     25          assert.strictEqual(isValidUTF8(Buffer.from([0xed, i, j])), false);
     26        }
     27      }
     28    });
     29 
     30    it('returns false for code points greater than U+10FFFF', () => {
     31      assert.strictEqual(
     32        isValidUTF8(Buffer.from([0xf4, 0x90, 0x80, 0x80])),
     33        false
     34      );
     35      assert.strictEqual(
     36        isValidUTF8(Buffer.from([0xf5, 0x80, 0x80, 0x80])),
     37        false
     38      );
     39    });
     40 
     41    it('returns true for a well-formed UTF-8 byte sequence', () => {
     42      // prettier-ignore
     43      const buf = Buffer.from([
     44        0xe2, 0x82, 0xAC, // €
     45        0xf0, 0x90, 0x8c, 0x88, // 𐍈
     46        0x24 // $
     47      ]);
     48 
     49      assert.strictEqual(isValidUTF8(buf), true);
     50    });
     51  });
     52 });