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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
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
-> do
EnumerableSpecs::Numerous.new(11,"22").minmax
end.should raise_error(ArgumentError)
-> 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
-> 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
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