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describe :enumerable_minmax, shared: true do
it "min should return the minimum element" do
@enum.minmax.should == [4, 10]
@strs.minmax.should == ["1010", "60"]
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 "returns [nil, nil] for an empty Enumerable" do
@empty_enum.minmax.should == [nil, nil]
end
it "raises a NoMethodError for elements without #<=>" do
-> { @incomparable_enum.minmax }.should raise_error(NoMethodError)
end
it "raises an ArgumentError when elements are incompatible" do
-> { @incompatible_enum.minmax }.should raise_error(ArgumentError)
-> { @enum.minmax{ |a, b| nil } }.should raise_error(ArgumentError)
end
end
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