native base64 encoding, fix for binary attachments (#589)

Author: benjamine

lib/cucumber/listener/json_formatter.js

@@ -1,7 +1,6 @@
 /* jshint -W106 */
 function JsonFormatter(options) {
   var Cucumber = require('../../cucumber');
-  var base64 = require('base-64');
 
   var self = Cucumber.Listener.Formatter(options);
 
@@ -86,8 +85,12 @@ function JsonFormatter(options) {
 
     if (stepResult.hasAttachments()) {
       currentStep.embeddings = stepResult.getAttachments().map(function (attachment) {
+        var data = attachment.getData();
+        if (!(data instanceof Buffer)) {
+          data = new Buffer(data);
+        }
         return {
-          data: base64.encode(attachment.getData()),
+          data: data.toString('base64'),
           mime_type: attachment.getMimeType(),
         };
       });

package.json

@@ -103,7 +103,6 @@
     "node": ">=0.10"
   },
   "dependencies": {
-    "base-64": "^0.1.0",
     "callsite": "^1.0.0",
     "camel-case": "^3.0.0",
     "cli-table": "^0.3.1",

spec/cucumber/listener/json_formatter_spec.js

@@ -3,6 +3,7 @@ require('../../support/spec_helper');
 
 describe("Cucumber.Listener.JsonFormatter", function () {
   var Cucumber = requireLib('cucumber');
+  var fs = require('fs');
   var jsonFormatter, options;
 
   beforeEach(function () {
@@ -244,7 +245,13 @@ describe("Cucumber.Listener.JsonFormatter", function () {
           beforeEach(function (){
             var attachment1 = createSpyWithStubs("first attachment", {getMimeType: "first mime type", getData: "first data"});
             var attachment2 = createSpyWithStubs("second attachment", {getMimeType: "second mime type", getData: "second data"});
-            var attachments = [attachment1, attachment2];
+            var favicon = fs.readFileSync('example/images/favicon.png');
+            var attachment3 = createSpyWithStubs("third attachment", {
+              getMimeType: "image/png",
+              getData: favicon
+            });
+            this.faviconBase64 = favicon.toString('base64');
+            var attachments = [attachment1, attachment2, attachment3];
             stepResult.hasAttachments.and.returnValue(true);
             stepResult.getAttachments.and.returnValue(attachments);
             jsonFormatter.handleStepResultEvent(stepResult);
@@ -257,7 +264,11 @@ describe("Cucumber.Listener.JsonFormatter", function () {
             var features = JSON.parse(json);
             expect(features[0].elements[0].steps[0].embeddings).toEqual([
               {data: 'Zmlyc3QgZGF0YQ==', mime_type: 'first mime type'},
-              {data: 'c2Vjb25kIGRhdGE=', mime_type: 'second mime type'}
+              {data: 'c2Vjb25kIGRhdGE=', mime_type: 'second mime type'},
+              {
+                data: this.faviconBase64,
+                mime_type: 'image/png'
+              }
             ]);
           });
         });