SnowLuma v2.4.2 source snapshot

packages/core/tests/hex.test.ts

@@ -0,0 +1,65 @@
+import { describe, it, expect } from 'vitest';
+import { toHex, fromHex, hexPreview } from '@snowluma/common/hex';
+
+describe('toHex', () => {
+    it('converts empty buffer', () => {
+        expect(toHex(new Uint8Array(0))).toBe('');
+    });
+
+    it('converts single byte', () => {
+        expect(toHex(new Uint8Array([0xff]))).toBe('ff');
+        expect(toHex(new Uint8Array([0x00]))).toBe('00');
+        expect(toHex(new Uint8Array([0x0a]))).toBe('0a');
+    });
+
+    it('converts multiple bytes', () => {
+        expect(toHex(new Uint8Array([0xde, 0xad, 0xbe, 0xef]))).toBe('deadbeef');
+    });
+
+    it('works with Buffer', () => {
+        expect(toHex(Buffer.from([0x01, 0x23, 0x45]))).toBe('012345');
+    });
+});
+
+describe('fromHex', () => {
+    it('converts empty string', () => {
+        expect(fromHex('')).toEqual(Buffer.alloc(0));
+    });
+
+    it('converts hex string', () => {
+        const buf = fromHex('deadbeef');
+        expect(buf).toEqual(Buffer.from([0xde, 0xad, 0xbe, 0xef]));
+    });
+
+    it('handles uppercase', () => {
+        const buf = fromHex('DEADBEEF');
+        expect(buf).toEqual(Buffer.from([0xde, 0xad, 0xbe, 0xef]));
+    });
+
+    it('throws on odd-length string', () => {
+        expect(() => fromHex('abc')).toThrow('Invalid hex string length');
+    });
+
+    it('roundtrips with toHex', () => {
+        const original = Buffer.from([0x00, 0x7f, 0x80, 0xff]);
+        expect(fromHex(toHex(original))).toEqual(original);
+    });
+});
+
+describe('hexPreview', () => {
+    it('shows full hex for small data', () => {
+        const data = new Uint8Array([0xab, 0xcd]);
+        expect(hexPreview(data)).toBe('abcd');
+    });
+
+    it('truncates with ellipsis', () => {
+        const data = new Uint8Array(128).fill(0xaa);
+        const preview = hexPreview(data, 4);
+        expect(preview).toBe('aaaaaaaa...');
+    });
+
+    it('no ellipsis when exactly at limit', () => {
+        const data = new Uint8Array(4).fill(0xbb);
+        expect(hexPreview(data, 4)).toBe('bbbbbbbb');
+    });
+});