class Test::Unit::Util::TC_Observable

# File test-unit-3.3.4/test/util/test_observable.rb, line 16
def setup
  @observable = TF_Observable.new
end

# File test-unit-3.3.4/test/util/test_observable.rb, line 73
def test_add_remove_with_default_listener
  assert_raises(ArgumentError, "add_listener should throw an exception if no callback is supplied") do
    @observable.add_listener(:property)
  end
      
  heard = false
  callback = proc { heard = true }
  assert_equal(callback, @observable.add_listener(:property, &callback), "add_listener should return the listener that was added")
      
  count = 0
  @observable.instance_eval do
    count = notify_listeners(:property)
  end
  assert_equal(1, count, "notify_listeners should have returned the number of listeners that were notified")
  assert(heard, "Should have heard the property changed")
      
  heard = false
  assert_equal(callback, @observable.remove_listener(:property, callback), "remove_listener should return the callback")
      
  count = 1
  @observable.instance_eval do
    count = notify_listeners(:property)
  end
  assert_equal(0, count, "notify_listeners should have returned the number of listeners that were notified")
  assert(!heard, "Should not have heard the property change")
end

# File test-unit-3.3.4/test/util/test_observable.rb, line 60
def test_multiple_value_observation
  values = []
  @observable.add_listener(:property, "a") do |first_value, second_value|
    values = [first_value, second_value]
  end
  count = 0
  @observable.instance_eval do
    count = notify_listeners(:property, "stuff", "more stuff")
  end
  assert_equal(1, count, "Should have update the correct number of listeners")
  assert_equal(["stuff", "more stuff"], values, "Should have received the value as an argument to the listener")
end

# File test-unit-3.3.4/test/util/test_observable.rb, line 20
def test_simple_observation
  assert_raises(ArgumentError, "add_listener should throw an exception if no callback is supplied") do
    @observable.add_listener(:property, "a")
  end
      
  heard = false
  callback = proc { heard = true }
  assert_equal("a", @observable.add_listener(:property, "a", &callback), "add_listener should return the listener that was added")
      
  count = 0
  @observable.instance_eval do
    count = notify_listeners(:property)
  end
  assert_equal(1, count, "notify_listeners should have returned the number of listeners that were notified")
  assert(heard, "Should have heard the property changed")
      
  heard = false
  assert_equal(callback, @observable.remove_listener(:property, "a"), "remove_listener should return the callback")
  
  count = 1
  @observable.instance_eval do
    count = notify_listeners(:property)
  end
  assert_equal(0, count, "notify_listeners should have returned the number of listeners that were notified")
  assert(!heard, "Should not have heard the property change")
end

# File test-unit-3.3.4/test/util/test_observable.rb, line 47
def test_value_observation
  value = nil
  @observable.add_listener(:property, "a") do |passed_value|
    value = passed_value
  end
  count = 0
  @observable.instance_eval do
    count = notify_listeners(:property, "stuff")
  end
  assert_equal(1, count, "Should have update the correct number of listeners")
  assert_equal("stuff", value, "Should have received the value as an argument to the listener")
end