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added RSpec and RSpec on Rails
[rails.git] / vendor / gems / rspec-1.1.2 / lib / spec / mocks / mock.rb
1 module Spec
2   module Mocks
3     class Mock
4       include Methods
5
6       # Creates a new mock with a +name+ (that will be used in error messages only)
7       # == Options:
8       # * <tt>:null_object</tt> - if true, the mock object acts as a forgiving null object allowing any message to be sent to it.
9       def initialize(name, stubs_and_options={})
10         @name = name
11         @options = parse_options(stubs_and_options)
12         assign_stubs(stubs_and_options)
13       end
14       
15       # This allows for comparing the mock to other objects that proxy
16       #  such as ActiveRecords belongs_to proxy objects
17       #  By making the other object run the comparison, we're sure the call gets delegated to the proxy target
18       # This is an unfortunate side effect from ActiveRecord, but this should be safe unless the RHS redefines == in a nonsensical manner
19       def ==(other)
20         other == __mock_proxy
21       end
22
23       def method_missing(sym, *args, &block)
24         __mock_proxy.instance_eval {@messages_received << [sym, args, block]}
25         begin
26           return self if __mock_proxy.null_object?
27           super(sym, *args, &block)
28         rescue NameError
29           __mock_proxy.raise_unexpected_message_error sym, *args
30         end
31       end
32       
33       def inspect
34         "#<#{self.class}:#{sprintf '0x%x', self.object_id} @name=#{@name.inspect}>"
35       end
36       
37       private
38       
39         def parse_options(options)
40           options.has_key?(:null_object) ? {:null_object => options.delete(:null_object)} : {}
41         end
42         
43         def assign_stubs(stubs)
44           stubs.each_pair do |message, response|
45             stub!(message).and_return(response)
46           end
47         end
48     end
49   end
50 end