File size: 1,248 Bytes
94193b5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | import { describe, it, expect } from 'vitest';
import { arrayBufferToBase64, base64ToArrayBuffer } from '../binary-encoding';
describe('binary-encoding', () => {
it('round-trips arbitrary bytes', () => {
const bytes = new Uint8Array([0, 1, 2, 127, 128, 200, 254, 255]);
const b64 = arrayBufferToBase64(bytes.buffer);
const out = new Uint8Array(base64ToArrayBuffer(b64));
expect(Array.from(out)).toEqual(Array.from(bytes));
});
it('produces valid base64 (decodable by atob)', () => {
const bytes = new Uint8Array([137, 80, 78, 71]); // PNG magic bytes
const b64 = arrayBufferToBase64(bytes.buffer);
expect(b64).toBe('iVBORw==');
});
it('handles an empty buffer', () => {
expect(arrayBufferToBase64(new ArrayBuffer(0))).toBe('');
expect(base64ToArrayBuffer('').byteLength).toBe(0);
});
it('round-trips content larger than the chunk size', () => {
const size = 0x8000 * 2 + 123; // spans multiple 32KB chunks
const bytes = new Uint8Array(size);
for (let i = 0; i < size; i++) bytes[i] = i % 256;
const out = new Uint8Array(base64ToArrayBuffer(arrayBufferToBase64(bytes.buffer)));
expect(out.length).toBe(size);
expect(Array.from(out)).toEqual(Array.from(bytes));
});
});
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