add splitBytesToWords unit test

packages/circuits/tests/splitBytesToWords.test.ts

@@ -0,0 +1,33 @@
+import { wasm as wasm_tester } from "circom_tester";
+import path from "path";
+import { bigIntToChunkedBytes, Uint8ArrayToCharArray } from "@zk-email/helpers/src/binary-format";
+
+
+describe("SplitBytesToWords Helper unit test", () => {
+    jest.setTimeout(0.1 * 60 * 1000);
+    let circuit: any;
+
+    beforeAll(async () => {
+        circuit = await wasm_tester(
+            path.join(__dirname, "./test-circuits/splitBytesToWords-test.circom"),
+            {
+                recompile: true,
+                include: path.join(__dirname, "../../../node_modules"),
+                // output: path.join(__dirname, "./compiled-test-circuits"),
+            }
+        );
+
+    });
+
+    it("should split correctly according to bigIntToChunkedBytes function", async function () {
+        const bytes = new Uint8Array(256).map(() => Math.floor(Math.random() * 256));
+        const bytesBigInt = bytes.reduce((acc, val) => (acc << 8n) | BigInt(val), 0n);
+        const ts_split_to_words = bigIntToChunkedBytes(bytesBigInt, 121, 17);
+        const ts_split_to_words_bigint = ts_split_to_words.map((word) => BigInt(word));
+        const witness = await circuit.calculateWitness({
+            in: Uint8ArrayToCharArray(bytes)
+        });
+        await circuit.assertOut(witness, { out: ts_split_to_words_bigint });
+    });
+
+});

packages/circuits/tests/test-circuits/splitBytesToWords-test.circom

@@ -0,0 +1,6 @@
+pragma circom 2.1.6;
+
+include "../../utils/bytes.circom";
+
+component main = SplitBytesToWords(256,121,17);
+