1const chai = require("chai");
 2const path = require("path");
 3
 4const wasm_tester = require("circom_tester").wasm;
 5
 6const F1Field = require("ffjavascript").F1Field;
 7const Scalar = require("ffjavascript").Scalar;
 8exports.p = Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617");
 9const Fr = new F1Field(exports.p);
10
11const assert = chai.assert;
12
13describe("Binary sum test", function () {
14    this.timeout(100000000);
15
16    it("Should create a constant circuit", async () => {
17        const circuit = await wasm_tester(path.join(__dirname, "circuits", "constants_test.circom"));
18        await circuit.loadConstraints();
19        assert.equal(circuit.nVars, 2);
20        assert.equal(circuit.constraints.length, 1);
21
22        const witness = await circuit.calculateWitness({ "in": Fr.toString(Fr.e("0xd807aa98"))}, true);
23
24        assert(Fr.eq(Fr.e(witness[0]),Fr.e(1)));
25        assert(Fr.eq(Fr.e(witness[1]),Fr.e("0xd807aa98")));
26    });
27    it("Should create a sum circuit", async () => {
28        const circuit = await wasm_tester(path.join(__dirname, "circuits", "sum_test.circom"));
29        await circuit.loadConstraints();
30
31        assert.equal(circuit.constraints.length, 97);  // 32 (in1) + 32(in2) + 32(out) + 1 (carry)
32
33        const witness = await circuit.calculateWitness({ "a": "111", "b": "222" }, true);
34
35        assert(Fr.eq(Fr.e(witness[0]),Fr.e(1)));
36        assert(Fr.eq(Fr.e(witness[1]),Fr.e("333")));
37    });
38});