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53 lines
1.5 KiB
53 lines
1.5 KiB
const path = require("path");
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const Fr = require("ffjavascript").bn128.Fr;
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const Scalar = require("ffjavascript").Scalar;
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const tester = require("circom").tester;
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function print(circuit, w, s) {
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console.log(s + ": " + w[circuit.getSignalIdx(s)]);
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}
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async function checkSub(_a,_b, circuit) {
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let a=Scalar.e(_a);
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let b=Scalar.e(_b);
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if (Scalar.lt(a, 0)) a = Scalar.add(a, Scalar.shl(1, 16));
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if (Scalar.lt(b, 0)) b = Scalar.add(b, Scalar.shl(1, 16));
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const w = await circuit.calculateWitness({a: a, b: b}, true);
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let res = Scalar.sub(a, b);
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if (Scalar.lt(res, 0)) res = Scalar.add(res, Scalar.shl(1, 16));
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await circuit.assertOut(w, {out: res});
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}
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describe("BinSub test", function () {
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this.timeout(100000);
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let circuit;
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before( async() => {
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circuit = await tester(path.join(__dirname, "circuits", "binsub_test.circom"));
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});
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it("Should check variuos ege cases", async () => {
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await checkSub(0,0, circuit);
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await checkSub(1,0, circuit);
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await checkSub(-1,0, circuit);
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await checkSub(2,1, circuit);
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await checkSub(2,2, circuit);
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await checkSub(2,3, circuit);
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await checkSub(2,-1, circuit);
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await checkSub(2,-2, circuit);
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await checkSub(2,-3, circuit);
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await checkSub(-2,-3, circuit);
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await checkSub(-2,-2, circuit);
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await checkSub(-2,-1, circuit);
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await checkSub(-2,0, circuit);
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await checkSub(-2,1, circuit);
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await checkSub(-2,2, circuit);
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await checkSub(-2,3, circuit);
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});
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});
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