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test/multiplexer.js

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+const chai = require("chai");
+const path = require("path");
+const zkSnark = require("zksnark");
+const compiler = require("circom");
+
+const assert = chai.assert;
+
+const bigInt = require("big-integer");
+
+
+describe("Mux4 test", () => {
+    it("Should create a constant multiplexer", async () => {
+
+        const cirDef = await compiler(path.join(__dirname, "circuits", "mux4_1.circom"));
+
+//        console.log(JSON.stringify(cirDef, null, 1));
+
+//        assert.equal(cirDef.nVars, 2);
+
+        const circuit = new zkSnark.Circuit(cirDef);
+
+        console.log("NConstrains: " + circuit.nConstraints);
+
+        for (i=0; i<16; i++) {
+            const w = circuit.calculateWitness({ "selector": zkSnark.bigInt(i).toString() });
+
+            assert(w[0].equals(zkSnark.bigInt(1)));
+
+            console.log(i + " -> " + w[circuit.getSignalIdx("main.out")].toString());
+//            assert(w[circuit.getSignalIdx("main.out")].equals(zkSnark.bigInt("100").add(zkSnark.bigInt(i))));
+        }
+    });
+});