add test.js for yarn testfunc

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-env", "@babel/preset-react"]
+}

package.json

@@ -20,7 +20,8 @@
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "testback": "mocha --require @babel/register 'src/test.js'"
   },
   "eslintConfig": {
     "extends": [
@@ -39,5 +40,11 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
+  },
+  "devDependencies": {
+    "@babel/preset-env": "^7.22.5",
+    "@babel/preset-react": "^7.22.5",
+    "@babel/register": "^7.22.5",
+    "mocha": "^10.2.0"
   }
 }

src/test.js

@@ -0,0 +1,17 @@
+import { simplifyGraph, findSubstrings } from "./gen_dfa";
+function test() {
+  const text =
+    "adsfasd DKI: v=12/; d=22; a=//121; d=1; bh=xUqTs2T2FPGCOB52 sdflj";
+  const regex = "DKI: (([vad]=([12/]+); )+)bh";
+  const simp_graph = simplifyGraph(regex);
+  const matched_dfa = findSubstrings(simp_graph, text);
+  for (const subs of matched_dfa[1]) {
+    var matched = text.slice(subs[0], subs[1] + 1);
+    console.log("matched: ", matched);
+  }
+}
+describe("test backend", function () {
+  it("should print correctly", function () {
+    test();
+  });
+});