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require 'spec_helper'
describe Immutable::Vector do
describe '#clear' do
[
[],
['A'],
%w[A B C],
].each do |values|
describe "on #{values}" do
let(:vector) { V[*values] }
it 'preserves the original' do
vector.clear
vector.should eql(V[*values])
end
it 'returns an empty vector' do
vector.clear.should equal(V.empty)
end
end
context 'from a subclass' do
it 'returns an instance of the subclass' do
subclass = Class.new(Immutable::Vector)
instance = subclass.new(%w{a b c})
instance.clear.class.should be(subclass)
instance.clear.should be_empty
end
end
end
end
end
|
