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require_relative '../../../spec_helper'
require_relative '../../enumerable/fixtures/classes'
describe "Enumerator::Chain#size" do
it "returns the sum of the sizes of the elements" do
a = mock('size')
a.should_receive(:size).and_return(40)
Enumerator::Chain.new(a, [:a, :b]).size.should == 42
end
it "returns nil or Infinity for the first element of such a size" do
[nil, Float::INFINITY].each do |special|
a = mock('size')
a.should_receive(:size).and_return(40)
b = mock('special')
b.should_receive(:size).and_return(special)
c = mock('not called')
c.should_not_receive(:size)
Enumerator::Chain.new(a, b, c).size.should == special
end
end
end
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