Add basic browser history test

Author: AlexHill

test/unit/pjax_fallback.js

@@ -118,6 +118,34 @@ asyncTest("sends correct HTTP referer after failed request"+s, function() {
   })
 })
 
+asyncTest("adds entry to browser history"+s, function() {
+  var frame = this.frame
+  var count = 0
+
+  frame.onpopstate = function() {
+    window.iframeLoad(frame)
+  }
+
+  this.loaded = function() {
+    count++
+
+    if (count == 1) {
+      equal(frame.location.pathname, "/hello.html")
+      ok(frame.history.length > 1)
+      frame.history.back()
+    } else if (count == 2) {
+      equal(frame.location.pathname, "/home.html")
+      frame.history.forward()
+      start()
+    }
+  }
+
+  frame.$.pjax({
+    url: "hello.html",
+    container: "#main"
+  })
+})
+
 asyncTest("scrolls to top of the page"+s, function() {
   var frame = this.frame