Add typing for barcode

barcode/barcode-tests.ts

@@ -0,0 +1,22 @@
+/// <reference path="barcode.d.ts" />
+import barcode = require('barcode');
+import path = require('path');
+
+var code39 = barcode('code39', {
+    data: "it works",
+    width: 400,
+    height: 100,
+});
+
+code39.getStream(function (err, readStream) {
+    if (err) throw err;
+
+    // 'readStream' is an instance of ReadableStream
+});
+
+var outfile = path.join(__dirname, 'imgs', 'mycode.png');
+code39.saveImage(outfile, function (err) {
+    if (err) throw err;
+
+    console.log('File has been written!');
+});