test() add test for utils

src/utils.test.ts

@@ -0,0 +1,23 @@
+import { numberToBytes, bytesToNumber } from './utils';
+
+describe('decrypt', () => {
+  it('converts a number to bytes', async () => {
+    const value = 28482;
+    const bytes = numberToBytes(value);
+    expect(bytes).toEqual(new Uint8Array([111, 66]));
+
+    const value2 = 255;
+    const bytes2 = numberToBytes(value2);
+    expect(bytes2).toEqual(new Uint8Array([255]));
+  });
+
+  it('converts bytes to number', async () => {
+    const value = new Uint8Array([23, 200, 15]);
+    const bytes = bytesToNumber(value);
+    expect(bytes).toBe(1558543);
+
+    const value2 = new Uint8Array();
+    const bytes2 = bytesToNumber(value2);
+    expect(bytes2).toBe(0);
+  });
+});