small fixes for neuigkeit spec

spec/models/calendar_spec.rb

@@ -2,4 +2,13 @@ require 'spec_helper'
 
 describe Calendar do
   pending "add some examples to (or delete) #{__FILE__}"
+  let(:rubrik) {FactoryGirl.create(:rubrik)}
+  let(:calendar) {FactoryGirl.build(:calendar, rubrik_id: rubrik.id)}
+  it "should be valid" do
+    expect(calendar).to be_valid
+  end
+
+  it "should be created" do
+    expect(calendar.save).to be true
+  end
 end