From a3812e3439ab098845ad72dc832f38f3b4562d11 Mon Sep 17 00:00:00 2001
From: Tim van den Eijnden <t.vandeneijnden@gynzy.com>
Date: Wed, 3 Feb 2016 21:27:07 +0100
Subject: [PATCH] added support for setting responseType to array buffer

---
 pretender.js             |  7 ++++++-
 test/passthrough_test.js | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/pretender.js b/pretender.js
index 822daa9..56b0f89 100644
--- a/pretender.js
+++ b/pretender.js
@@ -146,13 +146,18 @@ function interceptor(pretender) {
 
     var xhr = fakeXHR._passthroughRequest = new pretender._nativeXMLHttpRequest();
 
+    if (fakeXHR.responseType === 'arraybuffer') {
+      lifecycleProps = ['readyState', 'response', 'status', 'statusText'];
+      xhr.responseType = fakeXHR.responseType;
+    }
+
     // Use onload if the browser supports it
     if ('onload' in xhr) {
       evts.push('load');
     }
 
     // add progress event for async calls
-    if (fakeXHR.async) {
+    if (fakeXHR.async && fakeXHR.responseType !== 'arraybuffer') {
       evts.push('progress');
     }
 
diff --git a/test/passthrough_test.js b/test/passthrough_test.js
index 8833ccd..988c80e 100644
--- a/test/passthrough_test.js
+++ b/test/passthrough_test.js
@@ -91,6 +91,34 @@ describe('passthrough requests',  function(config) {
     xhr.send('some data');
   });
 
+  asyncTest('asynchronous request with pass-through and ' +
+    'arraybuffer as responseType', function(assert) {
+    var pretender = this.pretender;
+    function testXHR() {
+      this.pretender = pretender;
+      this.open = function() {};
+      this.setRequestHeader = function() {};
+      this.upload = {};
+      this.responseType = '';
+      this.send = {
+        pretender: pretender,
+        apply: function(xhr, argument) {
+          assert.equal(xhr.responseType, 'arraybuffer');
+          this.pretender.resolve(xhr);
+          QUnit.start();
+        }
+      };
+    }
+    pretender._nativeXMLHttpRequest = testXHR;
+
+    pretender.get('/some/path', pretender.passthrough);
+
+    var xhr = new window.XMLHttpRequest();
+    xhr.open('GET', '/some/path');
+    xhr.responseType = 'arraybuffer';
+    xhr.send();
+  });
+
   asyncTest('synchronous request does not have timeout, withCredentials and onprogress event', function(assert) {
     var pretender = this.pretender;
     function testXHR() {