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require File.expand_path('../../../spec_helper', __FILE__)
describe :enum_next, :shared => true do
before(:each) do
@enum = enumerator_class.new(1, :upto, 3)
end
it "returns the next element of the enumeration" do
@enum.next.should == 1
@enum.next.should == 2
@enum.next.should == 3
end
it "raises a StopIteration exception at the end of the stream" do
3.times { @enum.next }
lambda { @enum.next }.should raise_error(StopIteration)
end
ruby_version_is ""..."1.9" do
it "is rewound after encountering a StopIteration" do
3.times { @enum.next }
lambda { @enum.next }.should raise_error(StopIteration)
@enum.next.should == 1
end
end
ruby_version_is "1.9" do
it "cannot be called again until the enumerator is rewound" do
3.times { @enum.next }
lambda { @enum.next }.should raise_error(StopIteration)
lambda { @enum.next }.should raise_error(StopIteration)
lambda { @enum.next }.should raise_error(StopIteration)
@enum.rewind
@enum.next.should == 1
end
end
end
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