JackDanger / object_proxy

ObjectProxy provides a proxied interface to Ruby objects. It lets you add methods to objects that don't normally support them.

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object_proxy / test / test_object_proxy.rb
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fec8667a » JackDanger 2008-03-05 add all files to git 1 require 'test/unit'
2 require File.dirname(__FILE__) + '/../lib/object_proxy'
3
4 class OneHundredProxy < ObjectProxy
5 def initialize
6 @target = 100
7 end
8 end
9
10 class ObjectProxyTest < Test::Unit::TestCase
11 def test_does_not_respond_to_target
12 assert_raises(NoMethodError) { ObjectProxy.new('some_value').responds_to?(:target) }
13 end
14
15 def test_has_target_method_that_returns_the_provided_value
16 assert_equal 'target', ObjectProxy.new('target')
17 end
18
19 def test_target_object_does_not_have_identity_with_initialized_object
20 object = Object.new
21 assert !object.equal?(ObjectProxy.new(object))
22 end
23
24 def test_class_method_is_passed_to_target
25 assert_equal String, ObjectProxy.new('some value').class
26 end
27
28 def test_send_is_passed_to_target
29 object = 'ABCDEF'
30 assert_equal object.send(:length), ObjectProxy.new(object).send(:length)
31 end
32
33 def test_proxy_class_accesses_the_class_of_the_object_proxy
34 assert_equal ObjectProxy, ObjectProxy.new('value').proxy_class
35 end
36
37 def test_proxy_class_allows_methods_added_to_the_proxy_class
38 object = 'ABCDEF'
39 proxy = ObjectProxy.new(object)
40 proxy.proxy_class.class_eval do
41 define_method :return_target do
42 @target
43 end
44 end
45 assert_equal object, proxy.return_target
46 end
47
48 def test_method_missing_errors_are_raised_from_the_target_object
49 begin
50 ObjectProxy.new(12345).howzitgoin
51 rescue => e
52 assert_equal %Q(undefined method `howzitgoin' for 12345:Fixnum), e.message
53 end
54 end
55
56 def test_subclass_of_object_proxy_can_set_target_however_it_wants
57 assert_equal 100, OneHundredProxy.new.target
58 end
59 end