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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../../../shared/enumerator/rewind', __FILE__)
require File.expand_path('../fixtures/common', __FILE__)
describe "Enumerator#rewind" do
it_behaves_like(:enum_rewind, :rewind)
it "calls the enclosed object's rewind method if one exists" do
obj = mock('rewinder')
enum = obj.to_enum
obj.should_receive(:each).at_most(1)
obj.should_receive(:rewind)
enum.rewind
end
it "does nothing if the object doesn't have a #rewind method" do
obj = mock('rewinder')
enum = obj.to_enum
obj.should_receive(:each).at_most(1)
lambda { enum.rewind.should == enum }.should_not raise_error
end
end
describe "Enumerator#rewind" do
before :each do
ScratchPad.record []
@enum = EnumeratorSpecs::Feed.new.to_enum(:each)
end
it "clears a pending #feed value" do
@enum.next
@enum.feed :a
@enum.rewind
@enum.next
@enum.next
ScratchPad.recorded.should == [nil]
end
end
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