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require 'spec_helper'
describe Immutable::Vector do
describe '#each_with_index' do
describe 'with no block' do
let(:vector) { V['A', 'B', 'C'] }
it 'returns an Enumerator' do
vector.each_with_index.class.should be(Enumerator)
vector.each_with_index.to_a.should == [['A', 0], ['B', 1], ['C', 2]]
end
end
[1, 2, 31, 32, 33, 1023, 1024, 1025].each do |size|
context "on a #{size}-item vector" do
describe 'with a block' do
let(:vector) { V.new(1..size) }
it 'returns self' do
pairs = []
vector.each_with_index { |item, index| pairs << [item, index] }.should be(vector)
end
it 'iterates over the items in order' do
pairs = []
vector.each_with_index { |item, index| pairs << [item, index] }.should be(vector)
pairs.should == (1..size).zip(0..size.pred)
end
end
end
end
context 'on an empty vector' do
it "doesn't yield anything" do
V.empty.each_with_index { |item, index| fail }
end
end
end
end
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