From d464704f111d211c1f1ff9ef23ef1d755054be00 Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 15 Aug 2007 19:08:43 +0000
Subject: add tag v1_8_5_54

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_8_5_54@12952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ruby_1_8_5/test/testunit/util/test_observable.rb | 102 +++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 ruby_1_8_5/test/testunit/util/test_observable.rb

(limited to 'ruby_1_8_5/test/testunit/util/test_observable.rb')

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
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