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require_relative '../../../spec_helper'
require 'set'
require_relative 'shared/add'
describe "SortedSet#add" do
it_behaves_like :sorted_set_add, :add
it "takes only values which responds <=>" do
obj = mock('no_comparison_operator')
obj.stub!(:respond_to?).with(:<=>).and_return(false)
-> { SortedSet["hello"].add(obj) }.should raise_error(ArgumentError)
end
it "raises on incompatible <=> comparison" do
# Use #to_a here as elements are sorted only when needed.
# Therefore the <=> incompatibility is only noticed on sorting.
-> { SortedSet['1', '2'].add(3).to_a }.should raise_error(ArgumentError)
end
end
describe "SortedSet#add?" do
before :each do
@set = SortedSet.new
end
it "adds the passed Object to self" do
@set.add?("cat")
@set.should include("cat")
end
it "returns self when the Object has not yet been added to self" do
@set.add?("cat").should equal(@set)
end
it "returns nil when the Object has already been added to self" do
@set.add?("cat")
@set.add?("cat").should be_nil
end
end
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