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require "spec_helper"
require "hamster/vector"
describe Hamster::Vector do
describe "#take_while" do
[
[[], []],
[["A"], ["A"]],
[%w[A B C], %w[A B]]
].each do |values, expected|
describe "on #{values.inspect}" do
let(:vector) { V[*values] }
let(:result) { vector.take_while { |item| item < "C" }}
describe "with a block" do
it "returns #{expected.inspect}" do
result.should eql(V[*expected])
end
it "preserves the original" do
result
vector.should eql(V[*values])
end
end
describe "without a block" do
it "returns an Enumerator" do
vector.take_while.class.should be(Enumerator)
vector.take_while.each { |item| item < "C" }.should eql(V[*expected])
end
end
end
end
end
end
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