diff options
Diffstat (limited to 'ruby_1_8_5/test/testunit/util/test_observable.rb')
| -rw-r--r-- | ruby_1_8_5/test/testunit/util/test_observable.rb | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/ruby_1_8_5/test/testunit/util/test_observable.rb b/ruby_1_8_5/test/testunit/util/test_observable.rb new file mode 100644 index 0000000000..6cd10184f1 --- /dev/null +++ b/ruby_1_8_5/test/testunit/util/test_observable.rb @@ -0,0 +1,102 @@ +# Author:: Nathaniel Talbott. +# Copyright:: Copyright (c) 2000-2002 Nathaniel Talbott. All rights reserved. +# License:: Ruby license. + +require 'test/unit/util/observable' + +module Test + module Unit + module Util + class TC_Observable < TestCase + + class TF_Observable + include Observable + end + + def setup + @observable = TF_Observable.new + end + + 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 + + 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 + + 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 + + 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 + end + end + end +end |