1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/library/observer/add_observer_spec.rb b/spec/ruby/library/observer/add_observer_spec.rb
new file mode 100644
index 0000000000..5217ae6dc4
--- /dev/null
+++ b/spec/ruby/library/observer/add_observer_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Observer#add_observer" do
+
+  before :each do
+    @observable = ObservableSpecs.new
+    @observer = ObserverCallbackSpecs.new
+  end
+
+  it "adds the observer" do
+    @observer.value.should == nil
+    @observable.changed
+    @observable.notify_observers("test")
+    @observer.value.should == nil
+
+    @observable.add_observer(@observer)
+    @observable.changed
+    @observable.notify_observers("test2")
+    @observer.value.should == "test2"
+  end
+
+end