net: Add support for xhr.onerror

net.js

@@ -87,11 +87,13 @@ XMLHttpRequest.prototype = {
 				result[entrie[0]] = entrie[1]
 				return result
 			}, {})
-			require(url.protocol.slice(0, -1)).request(url, function(res) {
+			var req = require(url.protocol.slice(0, -1)).request(url, function(res) {
 				head(res.statusCode, res.statusMessage, res.headers)
 				res.on("data", fillBody)
 				res.on("end", done)
-			}).end(data)
+			})
+			if (xhr.onerror) req.on("error", xhr.onerror)
+			req.end(data)
 			return
 		}
 		if (url.protocol === "data:") {

test/net.js

@@ -71,6 +71,20 @@ describe("XMLHttpRequest", function() {
 		xhr.send()
 	})
 
+	it("calls onerror", function (assert, mock) {
+		assert.setTimeout(5000)
+		var xhr = new XMLHttpRequest()
+		xhr.open("GET", "http://0.0.0.0:0")
+		xhr.onerror = function() {
+			assert.equal(xhr.status, 0)
+			assert.equal(xhr.statusText, "")
+			assert.equal(xhr.responseXML, null)
+			assert.equal(xhr.responseText, "")
+			assert.end()
+		}
+		xhr.send()
+	})
+
 	describe("Data URLs", function() {
 		var table = [
 			[ "data:,Hello%2C%20World%21", "text/plain", "Hello, World!" ],