Add Jasmine tests to cover AJAX error notifications

cms/static/coffee/spec/main_spec.coffee

@@ -22,3 +22,37 @@ describe "main helper", ->
 
   it "setup AJAX CSRF token", ->
     expect($.ajaxSettings.headers["X-CSRFToken"]).toEqual("stubCSRFToken")
+
+describe "AJAX Errors", ->
+  tpl = readFixtures('system-feedback.underscore')
+
+  beforeEach ->
+    setFixtures($("<script>", {id: "system-feedback-tpl", type: "text/template"}).text(tpl))
+    appendSetFixtures(sandbox({id: "page-notification"}))
+    @requests = requests = []
+    @xhr = sinon.useFakeXMLHttpRequest()
+    @xhr.onCreate = (xhr) -> requests.push(xhr)
+
+  afterEach ->
+    @xhr.restore()
+
+  it "successful AJAX request does not pop an error notification", ->
+    expect($("#page-notification")).toBeEmpty()
+    $.ajax("/test")
+    expect($("#page-notification")).toBeEmpty()
+    @requests[0].respond(200)
+    expect($("#page-notification")).toBeEmpty()
+
+  it "AJAX request with error should pop an error notification", ->
+    $.ajax("/test")
+    @requests[0].respond(500)
+    expect($("#page-notification")).not.toBeEmpty()
+    expect($("#page-notification")).toContain('div.wrapper-notification-error')
+
+  it "can override AJAX request with error so it does not pop an error notification", ->
+    $.ajax
+      url: "/test"
+      notifyOnError: false
+    @requests[0].respond(500)
+    expect($("#page-notification")).toBeEmpty()
+