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require "spec_helper"
require "hamster/sorted_set"
describe Hamster::SortedSet do
describe "#empty?" do
[
[[], true],
[["A"], false],
[%w[A B C], false],
].each do |values, expected|
context "on #{values.inspect}" do
let(:sorted_set) { SS[*values] }
it "returns #{expected.inspect}" do
sorted_set.empty?.should == expected
end
end
end
end
describe ".empty" do
it "returns the canonical empty set" do
SS.empty.size.should be(0)
SS.empty.object_id.should be(SS.empty.object_id)
end
context "from a subclass" do
it "returns an empty instance of the subclass" do
subclass = Class.new(Hamster::SortedSet)
subclass.empty.class.should be(subclass)
subclass.empty.should be_empty
end
end
end
end
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