require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

describe "Enumerable#zip" do

  it "combines each element of the receiver with the element of the same index in arrays given as arguments" do
    EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6],[7,8,9]).should == [[1,4,7],[2,5,8],[3,6,9]]
    EnumerableSpecs::Numerous.new(1,2,3).zip.should == [[1],[2],[3]]
  end
  
  it "passes each element of the result array to a block and return nil if a block is given" do
    expected = [[1,4,7],[2,5,8],[3,6,9]]
    EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6],[7,8,9]) do |result_component|
      result_component.should == expected.shift
    end.should == nil
    expected.size.should == 0
  end
  
  it "fills resulting array with nils if an argument array is too short" do
    EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6], [7,8]).should == [[1,4,7],[2,5,8],[3,6,nil]]
  end
  
  platform_is_not :enumerable_java do
    ruby_version_is ''...'1.9' do
      it "converts arguments to arrays using #to_a" do
        convertable = EnumerableSpecs::ArrayConvertable.new(4,5,6)
        EnumerableSpecs::Numerous.new(1,2,3).zip(convertable).should == [[1,4],[2,5],[3,6]]
        convertable.called.should == :to_a
      end
    end
  end
  
  ruby_version_is '1.9' do
    it "converts arguments to arrays using #to_ary" do
      convertable = EnumerableSpecs::ArrayConvertable.new(4,5,6)
      EnumerableSpecs::Numerous.new(1,2,3).zip(convertable).should == [[1,4],[2,5],[3,6]]
      convertable.called.should == :to_ary
    end
  end
  
end

