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Diffstat (limited to 'spec/ruby/library/set/comparison_spec.rb')
-rw-r--r-- | spec/ruby/library/set/comparison_spec.rb | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/library/set/comparison_spec.rb b/spec/ruby/library/set/comparison_spec.rb new file mode 100644 index 0000000000..ddcfbae0af --- /dev/null +++ b/spec/ruby/library/set/comparison_spec.rb @@ -0,0 +1,27 @@ +require_relative '../../spec_helper' +require 'set' + +describe "Set#<=>" do + it "returns 0 if the sets are equal" do + (Set[] <=> Set[]).should == 0 + (Set[:a, :b, :c] <=> Set[:a, :b, :c]).should == 0 + end + + it "returns -1 if the set is a proper subset of the other set" do + (Set[] <=> Set[1]).should == -1 + (Set[1, 2] <=> Set[1, 2, 3]).should == -1 + end + + it "returns +1 if the set is a proper superset of other set" do + (Set[1] <=> Set[]).should == +1 + (Set[1, 2, 3] <=> Set[1, 2]).should == +1 + end + + it "returns nil if the set has unique elements" do + (Set[1, 2, 3] <=> Set[:a, :b, :c]).should be_nil + end + + it "returns nil when the argument is not set-like" do + (Set[] <=> false).should be_nil + end +end |