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