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

ruby_version_is "1.8.7" do
  describe "Enumerable#none?" do
    it "returns true if none of the elements in self are true" do
      e = EnumerableSpecs::Numerous.new(false, nil, false)
      e.none?.should be_true
    end

    it "returns false if at least one of the elements in self are true" do
      e = EnumerableSpecs::Numerous.new(false, nil, true, false)
      e.none?.should be_false
    end

    it "gathers whole arrays as elements when each yields multiple" do
      multi = EnumerableSpecs::YieldsMultiWithFalse.new
      multi.none?.should be_false
    end
  end

  describe "Enumerable#none? with a block" do
    before(:each) do
      @e = EnumerableSpecs::Numerous.new(1,1,2,3,4)
    end

    it "passes each element to the block in turn until it returns true" do
      acc = []
      @e.none? {|e| acc << e; false }
      acc.should == [1,1,2,3,4]
    end

    it "stops passing elements to the block when it returns true" do
      acc = []
      @e.none? {|e| acc << e; e == 3 ? true : false }
      acc.should == [1,1,2,3]
    end

    it "returns true if the block never returns true" do
      @e.none? {|e| false }.should be_true
    end

    it "returns false if the block ever returns true" do
      @e.none? {|e| e == 3 ? true : false }.should be_false
    end

    ruby_version_is ""..."1.9" do
      it "gathers whole arrays as elements when each yields multiple" do
        multi = EnumerableSpecs::YieldsMulti.new
        multi.none? {|e| e == 1 }.should be_true
      end
    end

    ruby_version_is "1.9" do
      it "gathers initial args as elements when each yields multiple" do
        multi = EnumerableSpecs::YieldsMulti.new
        multi.none? {|e| e == [1, 2] }.should be_true
      end
    end

    it "yields multiple arguments when each yields multiple" do
      multi = EnumerableSpecs::YieldsMulti.new
      yielded = []
      multi.none? {|e, i| yielded << [e, i] }
      yielded.should == [[1, 2]]
    end
  end
end