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20 lines
597 B
Ruby
20 lines
597 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'set'
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describe "Set#merge" do
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it "adds the elements of the passed Enumerable to self" do
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Set[:a, :b].merge(Set[:b, :c, :d]).should == Set[:a, :b, :c, :d]
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Set[1, 2].merge([3, 4]).should == Set[1, 2, 3, 4]
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end
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it "returns self" do
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set = Set[1, 2]
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set.merge([3, 4]).should equal(set)
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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[1, 2].merge(1) }.should raise_error(ArgumentError)
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lambda { Set[1, 2].merge(Object.new) }.should raise_error(ArgumentError)
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end
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end
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