diff options
Diffstat (limited to 'activemodel/test/cases/observing_test.rb')
-rw-r--r-- | activemodel/test/cases/observing_test.rb | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/activemodel/test/cases/observing_test.rb b/activemodel/test/cases/observing_test.rb index f6ec24ae57..f8bfcf839d 100644 --- a/activemodel/test/cases/observing_test.rb +++ b/activemodel/test/cases/observing_test.rb @@ -70,23 +70,38 @@ class ObservingTest < ActiveModel::TestCase ObservedModel.instantiate_observers end + test "raises an appropriate error when a developer accidentally adds the wrong class (i.e. Widget instead of WidgetObserver)" do + assert_raise ArgumentError do + ObservedModel.observers = ['string'] + ObservedModel.instantiate_observers + end + assert_raise ArgumentError do + ObservedModel.observers = [:string] + ObservedModel.instantiate_observers + end + assert_raise ArgumentError do + ObservedModel.observers = [String] + ObservedModel.instantiate_observers + end + end + test "passes observers to subclasses" do FooObserver.instance bar = Class.new(Foo) - assert_equal Foo.count_observers, bar.count_observers + assert_equal Foo.observers_count, bar.observers_count end end class ObserverTest < ActiveModel::TestCase def setup ObservedModel.observers = :foo_observer - FooObserver.instance_eval do + FooObserver.singleton_class.instance_eval do alias_method :original_observed_classes, :observed_classes end end def teardown - FooObserver.instance_eval do + FooObserver.singleton_class.instance_eval do undef_method :observed_classes alias_method :observed_classes, :original_observed_classes end @@ -145,4 +160,15 @@ class ObserverTest < ActiveModel::TestCase end assert_equal :in_around_save, yielded_value end + + test "observe redefines observed_classes class method" do + class BarObserver < ActiveModel::Observer + observe :foo + end + + assert_equal [Foo], BarObserver.observed_classes + + BarObserver.observe(ObservedModel) + assert_equal [ObservedModel], BarObserver.observed_classes + end end |