Test demonstrating blob does not handle non-ascii data correctly.

test/server.js

@@ -28,6 +28,10 @@ var routes = {
     });
     res.end('hi');
   },
+  '/nonascii': function(res) {
+    res.writeHead(200, {'Content-Type': 'text/plain'});
+    res.end(new Buffer([200, 201]));
+  },
   '/redirect/301': function(res) {
     res.writeHead(301, {'Location': '/hello'});
     res.end();

test/test.js

@@ -73,6 +73,15 @@ suite('Body mixin', function() {
       })
     })
 
+    test('blob handles non-ascii data', function() {
+      return fetch('/nonascii').then(function(response) {
+        return response.blob()
+      }).then(function(blob) {
+        assert(blob instanceof Blob, 'blob is a Blob instance')
+        assert.equal(blob.size, 2, 'blob.size is correct')
+      })
+    })
+
     test('rejects blob promise after body is consumed', function() {
       return fetch('/hello').then(function(response) {
         assert(response.blob, 'Body does not implement blob')