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

describe "Enumerable#find_index" do  
  ruby_version_is "1.8.7" do
    before :each do
      @elements = [2, 4, 6, 8, 10]
      @numerous = EnumerableSpecs::Numerous.new(*@elements)
    end

    it "passes each entry in enum to block while block when block is false" do
      visited_elements = []
      @numerous.find_index do |element|
        visited_elements << element
        false
      end
      visited_elements.should == @elements
    end

    it "returns nil when the block is false" do
      @numerous.find_index {|e| false }.should == nil
    end

    it "returns the first index for which the block is not false" do
      @elements.each_with_index do |element, index|
        @numerous.find_index {|e| e > element - 1 }.should == index
      end
    end

    it "returns the first index found" do
      repeated = [10, 11, 11, 13, 11, 13, 10, 10, 13, 11]
      numerous_repeat = EnumerableSpecs::Numerous.new(*repeated)
      repeated.each do |element|
        numerous_repeat.find_index(element).should == element - 10
      end
    end

    it "returns nil when the element not found" do
      @numerous.find_index(-1).should == nil
    end

    it "ignores the block if an argument is given" do
      @numerous.find_index(-1) {|e| true }.should == nil
    end
    
    platform_is_not :enumerable_java do
      ruby_version_is '1.8.7' do
        it 'returns an Enumerator if no block given' do
          @numerous.find_index.should be_an_instance_of(enumerator_class)
        end
      end
    end

  end

end
