Fix old poseidon circuit

circuits/poseidon_old.circom

@@ -1,6 +1,6 @@
 pragma circom 2.0.0;
 
-include "./poseidon_constants.circom";
+include "./poseidon_constants_old.circom";
 
 template Sigma() {
     signal input in;

test/circuits/poseidonold3_test.circom

@@ -0,0 +1,5 @@
+pragma circom 2.0.0;
+
+include "../../circuits/poseidon_old.circom";
+
+component main = Poseidon(2);

test/poseidonoldcircuit.js

@@ -0,0 +1,41 @@
+const chai = require("chai");
+const path = require("path");
+const wasm_tester = require("circom_tester").wasm;
+
+const buildPoseidon = require("circomlibjs").buildPoseidon;
+
+const assert = chai.assert;
+
+describe("Poseidon(old) Circuit test", function () {
+    let poseidon;
+    let F;
+    let circuit3;
+    this.timeout(1000000);
+
+    before( async () => {
+        poseidon = await buildPoseidon();
+        F = poseidon.F;
+        circuit3 = await wasm_tester(path.join(__dirname, "circuits", "poseidonold3_test.circom"));
+    });
+
+    it("Should check constrain of hash([1, 2]) t=3", async () => {
+        const w = await circuit3.calculateWitness({inputs: [1, 2]});
+
+        const res2 = poseidon([1,2]);
+
+        assert(F.eq(F.e("7853200120776062878684798364095072458815029376092732009249414926327459813530"), F.e(res2)));
+        await circuit3.assertOut(w, {out : F.toObject(res2)});
+        await circuit3.checkConstraints(w);
+    });
+
+    it("Should check constrain of hash([3, 4]) t=3", async () => {
+        const w = await circuit3.calculateWitness({inputs: [3, 4]});
+
+        const res2 = poseidon([3, 4]);
+
+        assert(F.eq(F.e("14763215145315200506921711489642608356394854266165572616578112107564877678998"), F.e(res2)));
+        await circuit3.assertOut(w, {out : F.toObject(res2)});
+        await circuit3.checkConstraints(w);
+    });
+
+});