1const chai = require("chai");
 2const path = require("path");
 3
 4const tester = require("circom").tester;
 5
 6const bigInt = require("big-integer");
 7
 8const assert = chai.assert;
 9
10describe("Binary sum test", function () {
11
12    this.timeout(100000000);
13
14    it("Should create a constant circuit", async () => {
15        const circuit = await tester(path.join(__dirname, "circuits", "constants_test.circom"));
16        await circuit.loadConstraints();
17
18        assert.equal(circuit.nVars, 2);
19        assert.equal(circuit.constraints.length, 1);
20
21        const witness = await circuit.calculateWitness({ "in": bigInt("d807aa98", 16)}, true);
22
23        assert(witness[0].equals(bigInt(1)));
24        assert(witness[1].equals(bigInt("d807aa98", 16)));
25    });
26    it("Should create a sum circuit", async () => {
27        const circuit = await tester(path.join(__dirname, "circuits", "sum_test.circom"));
28        await circuit.loadConstraints();
29
30        assert.equal(circuit.constraints.length, 97);  // 32 (in1) + 32(in2) + 32(out) + 1 (carry)
31
32        const witness = await circuit.calculateWitness({ "a": "111", "b": "222" }, true);
33
34        assert(witness[0].equals(bigInt(1)));
35        assert(witness[1].equals(bigInt("333")));
36    });
37});