66 lines
2.0 KiB
TypeScript
66 lines
2.0 KiB
TypeScript
import { describe, it, expect } from 'vitest';
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import { toHex, fromHex, hexPreview } from '@snowluma/common/hex';
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describe('toHex', () => {
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it('converts empty buffer', () => {
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expect(toHex(new Uint8Array(0))).toBe('');
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});
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it('converts single byte', () => {
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expect(toHex(new Uint8Array([0xff]))).toBe('ff');
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expect(toHex(new Uint8Array([0x00]))).toBe('00');
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expect(toHex(new Uint8Array([0x0a]))).toBe('0a');
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});
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it('converts multiple bytes', () => {
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expect(toHex(new Uint8Array([0xde, 0xad, 0xbe, 0xef]))).toBe('deadbeef');
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});
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it('works with Buffer', () => {
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expect(toHex(Buffer.from([0x01, 0x23, 0x45]))).toBe('012345');
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});
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});
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describe('fromHex', () => {
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it('converts empty string', () => {
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expect(fromHex('')).toEqual(Buffer.alloc(0));
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});
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it('converts hex string', () => {
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const buf = fromHex('deadbeef');
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expect(buf).toEqual(Buffer.from([0xde, 0xad, 0xbe, 0xef]));
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});
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it('handles uppercase', () => {
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const buf = fromHex('DEADBEEF');
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expect(buf).toEqual(Buffer.from([0xde, 0xad, 0xbe, 0xef]));
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});
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it('throws on odd-length string', () => {
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expect(() => fromHex('abc')).toThrow('Invalid hex string length');
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});
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it('roundtrips with toHex', () => {
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const original = Buffer.from([0x00, 0x7f, 0x80, 0xff]);
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expect(fromHex(toHex(original))).toEqual(original);
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});
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});
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describe('hexPreview', () => {
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it('shows full hex for small data', () => {
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const data = new Uint8Array([0xab, 0xcd]);
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expect(hexPreview(data)).toBe('abcd');
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});
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it('truncates with ellipsis', () => {
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const data = new Uint8Array(128).fill(0xaa);
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const preview = hexPreview(data, 4);
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expect(preview).toBe('aaaaaaaa...');
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});
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it('no ellipsis when exactly at limit', () => {
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const data = new Uint8Array(4).fill(0xbb);
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expect(hexPreview(data, 4)).toBe('bbbbbbbb');
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});
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});
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