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class MessageAppender
def initialize(appendage)
@appendage = appendage
end
def append_to(message)
if_told_to_yield do
message << @appendage
end
end
end
describe "a message expectation yielding to a block" do
it "should yield if told to" do
appender = MessageAppender.new("appended to")
appender.should_receive(:if_told_to_yield).and_yield
message = ""
appender.append_to(message)
message.should == "appended to"
end
it "should not yield if not told to" do
appender = MessageAppender.new("appended to")
appender.should_receive(:if_told_to_yield)
message = ""
appender.append_to(message)
message.should == ""
end
end