--- /dev/null
+var sys = require("util")
+ , assert = require("assert")
+ , XMLHttpRequest = require("../lib/XMLHttpRequest").XMLHttpRequest
+ , xhr = new XMLHttpRequest();
+
+// Test constant values
+assert.equal(0, xhr.UNSENT);
+assert.equal(1, xhr.OPENED);
+assert.equal(2, xhr.HEADERS_RECEIVED);
+assert.equal(3, xhr.LOADING);
+assert.equal(4, xhr.DONE);
+
+sys.puts("done");