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require "spec_helper"
require "hamster/sorted_set"
describe Hamster::SortedSet do
describe ".new" do
it "accepts a single enumerable argument and creates a new sorted set" do
sorted_set = SS.new([1,2,3])
sorted_set.size.should be(3)
sorted_set[0].should be(1)
sorted_set[1].should be(2)
sorted_set[2].should be(3)
end
it "also works with a Range" do
sorted_set = SS.new(1..3)
sorted_set.size.should be(3)
sorted_set[0].should be(1)
sorted_set[1].should be(2)
sorted_set[2].should be(3)
end
it "is amenable to overriding of #initialize" do
class SnazzySortedSet < Hamster::SortedSet
def initialize
super(['SNAZZY!!!'])
end
end
sorted_set = SnazzySortedSet.new
sorted_set.size.should be(1)
sorted_set.to_a.should == ['SNAZZY!!!']
end
it "accepts a block with arity 1" do
sorted_set = SS.new(1..3) { |a| -a }
sorted_set[0].should be(3)
sorted_set[1].should be(2)
sorted_set[2].should be(1)
end
it "accepts a block with arity 2" do
sorted_set = SS.new(1..3) { |a,b| b <=> a }
sorted_set[0].should be(3)
sorted_set[1].should be(2)
sorted_set[2].should be(1)
end
it "can use a block produced by Symbol#to_proc" do
sorted_set = SS.new([Object, BasicObject], &:name.to_proc)
sorted_set[0].should be(BasicObject)
sorted_set[1].should be(Object)
end
context "from a subclass" do
it "returns a frozen instance of the subclass" do
subclass = Class.new(Hamster::SortedSet)
instance = subclass.new(["some", "values"])
instance.class.should be subclass
instance.frozen?.should be true
end
end
end
describe ".[]" do
it "accepts a variable number of items and creates a new sorted set" do
sorted_set = SS['a', 'b']
sorted_set.size.should be(2)
sorted_set[0].should == 'a'
sorted_set[1].should == 'b'
end
end
end
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