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describe :sorted_set_difference, :shared => true do
before :each do
@set = SortedSet["a", "b", "c"]
end
it "returns a new SortedSet containting self's elements excluding the elements in the passed Enumerable" do
@set.send(@method, SortedSet["a", "b"]).should == SortedSet["c"]
@set.send(@method, ["b", "c"]).should == SortedSet["a"]
end
it "raises an ArgumentError when passed a non-Enumerable" do
lambda { @set.send(@method, 1) }.should raise_error(ArgumentError)
lambda { @set.send(@method, Object.new) }.should raise_error(ArgumentError)
end
end
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