chore: improve tests, fix constructor

Author: tabaktoni

__tests__/utils/CairoTypes/uint256.test.ts

@@ -1,4 +1,5 @@
 /* eslint-disable no-new */
+import { Uint256 } from '../../../src';
 import {
   CairoUint256,
   UINT_256_HIGH_MAX,
@@ -100,6 +101,32 @@ describe('CairoUint256 class test', () => {
     expect(case1).toEqual(case4);
   });
 
+  test('constructor 2 should support Uint256 {low, high}', () => {
+    const cases: Uint256[] = [];
+    cases[cases.length] = new CairoUint256({ low: 0, high: 0 });
+    cases[cases.length] = new CairoUint256({ low: '0', high: '0' });
+    cases[cases.length] = new CairoUint256({ low: 0n, high: 0n });
+    cases[cases.length] = new CairoUint256({ low: '0x0', high: '0x0' });
+
+    const cases2: Uint256[] = [];
+    cases2[cases2.length] = new CairoUint256({ low: 10000, high: 10000 });
+    cases2[cases2.length] = new CairoUint256({ low: '10000', high: '10000' });
+    cases2[cases2.length] = new CairoUint256({ low: 10000n, high: 10000n });
+    cases2[cases2.length] = new CairoUint256({ low: '0x2710', high: '0x2710' });
+
+    expect(
+      cases.every((it) => {
+        return it.low === 0n && it.high === 0n;
+      })
+    ).toEqual(true);
+
+    expect(
+      cases2.every((it) => {
+        return it.low === 10000n && it.high === 10000n;
+      })
+    ).toEqual(true);
+  });
+
   test('should convert UINT_256_MAX to Uint256 dec struct', () => {
     const u256 = new CairoUint256(UINT_256_MAX);
     const u256Hex = u256.toUint256DecimalString();

src/utils/cairoDataTypes/uint256.ts

@@ -37,7 +37,7 @@ export class CairoUint256 {
   public constructor(uint256: Uint256);
 
   public constructor(...arr: any[]) {
-    if (typeof arr === 'object' && arr.length === 1 && arr[0].low && arr[0].high) {
+    if (typeof arr[0] === 'object' && arr.length === 1 && 'low' in arr[0] && 'high' in arr[0]) {
       const props = CairoUint256.validateProps(arr[0].low, arr[0].high);
       this.low = props.low;
       this.high = props.high;