Merge other basic circuits here

test/sha256.js

@@ -0,0 +1,42 @@
+const chai = require("chai");
+const path = require("path");
+const snarkjs = require("snarkjs");
+const crypto = require("crypto");
+
+const compiler = require("circom");
+
+const assert = chai.assert;
+
+const sha256 = require("./helpers/sha256");
+
+// const printSignal = require("./helpers/printsignal");
+
+
+describe("SHA256 test", () => {
+    it("Should calculate a hash", async () => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "sha256_2_test.circom"));
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        console.log("Vars: "+circuit.nVars);
+        console.log("Constraints: "+circuit.nConstraints);
+
+        const witness = circuit.calculateWitness({ "a": "1", "b": "2" });
+
+        const b = new Buffer.alloc(54);
+        b[26] = 1;
+        b[53] = 2;
+
+        const hash = crypto.createHash("sha256")
+            .update(b)
+            .digest("hex");
+        const r = "0x" + hash.slice(10);
+
+        const hash2 = sha256.hash(b.toString("hex"), {msgFormat: "hex-bytes"});
+
+        assert.equal(hash, hash2);
+
+        assert(witness[1].equals(snarkjs.bigInt(r)));
+    }).timeout(1000000);
+
+
+});