feat: handle non-string inputs

Author: anonrig

lib/errors.js

@@ -0,0 +1,13 @@
+function createError(name, message) {
+  const error = new Error();
+  error.message = message;
+  error.name = name;
+  return error;
+}
+const codes = {
+  FST_QS_INVALID_INPUT: createError("FST_QS_INVALID_INPUT", "Invalid Input"),
+};
+
+module.exports = {
+  codes,
+};

lib/index.js

@@ -1,7 +1,9 @@
 "use strict";
 
+const errors = require("./errors");
 const parse = require("./parse");
 
 module.exports = {
+  errors,
   parse,
 };

lib/parse.js

@@ -1,10 +1,15 @@
 "use strict";
 
+const errors = require("./errors");
+
 /**
  * @callback parse
  * @param {string} input
  */
 function parse(input) {
+  if (typeof input !== "string") {
+    throw errors.codes.FST_QS_INVALID_INPUT;
+  }
   const result = Object.create(null);
 
   let key = "";

test/basics.test.ts

@@ -25,3 +25,7 @@ test("should parse the basics", () => {
     assert.deepEqual(qs.parse(t[0]), t[1]);
   });
 });
+
+test("should throw error on invalid type", () => {
+  assert.throws(() => qs.parse(5), "Invalid Input");
+});