added example, updated tests, updated readme

README.md

@@ -19,7 +19,7 @@ const arr = [
   'https://foo.bar?some=params&over=here',
   'https://foo.bar?some=test'
 ];
-const file = 'sample.json';
+const file = '_sample.json';
 
 parser.convert(arr, file, (err, res) => {
   if (!err) console.log('success!');

example.js

@@ -0,0 +1,10 @@
+const parser = require('./');
+const arr = [
+  'https://foo.bar?some=params&over=here',
+  'https://foo.bar?some=test'
+];
+const file = '_sample.json';
+
+parser.convert(arr, file, (err, res) => {
+  if (!err) console.log('success!');
+});

index.js

@@ -5,6 +5,10 @@
   const fs = require('fs');
 
   function convert(arr, file, callback) {
+    if (!Array.isArray(arr)) {
+      callback(new Error('First argument must be an array'));
+      return false;
+    }
     const data = {};
     const final = arr.map((url) => {
       const obj = parse(url);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "query-string-json",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "description": "Parse and convert URL query strings to JSON",
   "author": "Michael Herman",
   "license": "MIT",

test/convert.js

@@ -29,6 +29,21 @@
         });
       });
     });
+    it('should return an error if the object is falsely', (done) => {
+      helpers.convert(null, '_sample.json', (err, res) => {
+        should.exist(err);
+      });
+      helpers.convert(undefined, '_sample.json', (err, res) => {
+        should.exist(err);
+      });
+      helpers.convert(false, '_sample.json', (err, res) => {
+        should.exist(err);
+      });
+      helpers.convert({}, '_sample.json', (err, res) => {
+        should.exist(err);
+      });
+      done();
+    });
   });
 
 }());