57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
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const chai = require("chai");
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const path = require("path");
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const snarkjs = require("snarkjs");
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const compiler = require("circom");
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const assert = chai.assert;
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const bigInt = snarkjs.bigInt;
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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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function checkSub(_a,_b, circuit) {
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let a=bigInt(_a);
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let b=bigInt(_b);
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if (a.lesser(bigInt.zero)) a = a.add(bigInt.one.shl(16));
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if (b.lesser(bigInt.zero)) b = b.add(bigInt.one.shl(16));
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const w = circuit.calculateWitness({a: a, b: b});
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let res = a.sub(b);
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if (res.lesser(bigInt.zero)) res = res.add(bigInt.one.shl(16));
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assert( w[circuit.getSignalIdx("main.out")].equals(bigInt(res)) );
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}
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describe("BinSub test", () => {
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let circuit;
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before( async() => {
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const cirDef = await compiler(path.join(__dirname, "circuits", "binsub_test.circom"));
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circuit = new snarkjs.Circuit(cirDef);
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console.log("NConstrains BinSub: " + circuit.nConstraints);
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});
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it("Should check variuos ege cases", async () => {
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checkSub(0,0, circuit);
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checkSub(1,0, circuit);
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checkSub(-1,0, circuit);
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checkSub(2,1, circuit);
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checkSub(2,2, circuit);
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checkSub(2,3, circuit);
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checkSub(2,-1, circuit);
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checkSub(2,-2, circuit);
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checkSub(2,-3, circuit);
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checkSub(-2,-3, circuit);
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checkSub(-2,-2, circuit);
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checkSub(-2,-1, circuit);
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checkSub(-2,0, circuit);
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checkSub(-2,1, circuit);
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checkSub(-2,2, circuit);
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checkSub(-2,3, circuit);
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});
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});
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