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29 lines
836 B
Ruby
29 lines
836 B
Ruby
require_relative '../../spec_helper'
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require 'set'
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ruby_version_is "3.0" do
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describe "Set#<=>" do
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it "returns 0 if the sets are equal" do
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(Set[] <=> Set[]).should == 0
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(Set[:a, :b, :c] <=> Set[:a, :b, :c]).should == 0
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end
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it "returns -1 if the set is a proper subset of the other set" do
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(Set[] <=> Set[1]).should == -1
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(Set[1, 2] <=> Set[1, 2, 3]).should == -1
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end
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it "returns +1 if the set is a proper superset of other set" do
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(Set[1] <=> Set[]).should == +1
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(Set[1, 2, 3] <=> Set[1, 2]).should == +1
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end
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it "returns nil if the set has unique elements" do
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(Set[1, 2, 3] <=> Set[:a, :b, :c]).should be_nil
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end
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it "returns nil when the argument is not set-like" do
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(Set[] <=> false).should be_nil
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end
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end
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end
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