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require_relative '../../../spec_helper'
require 'set'
describe "SortedSet#merge" do
it "adds the elements of the passed Enumerable to self" do
SortedSet["a", "b"].merge(SortedSet["b", "c", "d"]).should == SortedSet["a", "b", "c", "d"]
SortedSet[1, 2].merge([3, 4]).should == SortedSet[1, 2, 3, 4]
end
it "returns self" do
set = SortedSet[1, 2]
set.merge([3, 4]).should equal(set)
end
it "raises an ArgumentError when passed a non-Enumerable" do
-> { SortedSet[1, 2].merge(1) }.should raise_error(ArgumentError)
-> { SortedSet[1, 2].merge(Object.new) }.should raise_error(ArgumentError)
end
end
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