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Diffstat (limited to 'spec/ruby/core/enumerable/minmax_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/minmax_spec.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/minmax_spec.rb b/spec/ruby/core/enumerable/minmax_spec.rb new file mode 100644 index 0000000000..10bc9b68e4 --- /dev/null +++ b/spec/ruby/core/enumerable/minmax_spec.rb @@ -0,0 +1,44 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Enumerable#minmax" do + before :each do + @enum = EnumerableSpecs::Numerous.new(6, 4, 5, 10, 8) + + @strs = EnumerableSpecs::Numerous.new("333", "2", "60", "55555", "1010", "111") + end + + it "min should return the minimum element" do + @enum.minmax.should == [4, 10] + @strs.minmax.should == ["1010", "60" ] + end + + it "returns [nil, nil] for an empty Enumerable" do + EnumerableSpecs::Empty.new.minmax.should == [nil, nil] + end + + it "raises an ArgumentError when elements are incomparable" do + lambda do + EnumerableSpecs::Numerous.new(11,"22").minmax + end.should raise_error(ArgumentError) + lambda do + EnumerableSpecs::Numerous.new(11,12,22,33).minmax{|a, b| nil} + end.should raise_error(ArgumentError) + end + + it "raises a NoMethodError for elements without #<=>" do + lambda do + EnumerableSpecs::Numerous.new(BasicObject.new, BasicObject.new).minmax + end.should raise_error(NoMethodError) + end + + it "returns the minimum when using a block rule" do + @enum.minmax {|a,b| b <=> a }.should == [10, 4] + @strs.minmax {|a,b| a.length <=> b.length }.should == ["2", "55555"] + end + + it "gathers whole arrays as elements when each yields multiple" do + multi = EnumerableSpecs::YieldsMulti.new + multi.minmax.should == [[1, 2], [6, 7, 8, 9]] + end +end |