use bigint to compare hashes

src/test/e2e-emulated/intrinsics.spec.ts

@@ -263,16 +263,17 @@ describe("intrinsics", () => {
         expect(await contract.getGetCrc32_4()).toBe(0n);
     });
 
-    const checkSha256 = async (input: string) => {
-        const expected = sha256_sync(input).toString("hex");
-        if (expected.startsWith("0")) {
-            // Since TVM calculates sha256 as an Int, if the resulting hash starts with zero,
-            // that zero will be truncated in the TVM result, so we skip such cases.
-            return;
-        }
+    const bufferToBigInt = (buffer: Buffer): bigint => {
+        return buffer.reduce(
+            (acc, byte) => (acc << BigInt(8)) | BigInt(byte),
+            BigInt(0),
+        );
+    };
 
+    const checkSha256 = async (input: string) => {
+        const expected = bufferToBigInt(sha256_sync(input));
         const actual = await contract.getGetHashLongRuntime(input);
-        expect(actual.toString(16)).toEqual(expected);
+        expect(actual.toString(16)).toEqual(expected.toString(16));
     };
 
     const generateString = (length: number): string => {