feat(poseidon): add hash test for random value

test/poseidon.ts

@@ -0,0 +1,21 @@
+import { expect } from "chai";
+import { ethers } from "hardhat";
+
+describe("Rln", function () {
+  it("Deploying", async function () {
+    const PoseidonHasher = await ethers.getContractFactory("PoseidonHasher");
+    const poseidonHasher = await PoseidonHasher.deploy();
+  
+    await poseidonHasher.deployed();
+  
+    console.log("PoseidonHasher deployed to:", poseidonHasher.address);
+  
+    // We test hashing for a random number
+    const hash = await poseidonHasher.hash("19014214495641488759237505126948346942972912379615652741039992445865937985820");
+ 
+    console.log("Hash:", hash);
+
+    //Expect 0x0c3ac305f6a4fe9bfeb3eba978bc876e2a99208b8b56c80160cfb54ba8f02368
+
+  });
+});