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