tests: add range tests to res.download

test/res.download.js

@@ -20,6 +20,33 @@ describe('res', function(){
       .expect('Content-Disposition', 'attachment; filename="user.html"')
       .expect(200, '<p>{{user.name}}</p>', done)
     })
+
+    it('should accept range requests', function (done) {
+      var app = express()
+
+      app.get('/', function (req, res) {
+        res.download('test/fixtures/user.html')
+      })
+
+      request(app)
+        .get('/')
+        .expect('Accept-Ranges', 'bytes')
+        .expect(200, '<p>{{user.name}}</p>', done)
+    })
+
+    it('should respond with requested byte range', function (done) {
+      var app = express()
+
+      app.get('/', function (req, res) {
+        res.download('test/fixtures/user.html')
+      })
+
+      request(app)
+        .get('/')
+        .set('Range', 'bytes=0-2')
+        .expect('Content-Range', 'bytes 0-2/20')
+        .expect(206, '<p>', done)
+    })
   })
 
   describe('.download(path, filename)', function(){