my_each spec

gistfile1.rb

class Array
  def my_each
  end
  
  def my_map
  end
  
  def my_inject
  end
end




describe "My Array Methods" do
  let(:array) { [1,2,3,4] }
 
  describe "#my_each" do
 
    it "iterates over each item" do
      sum = 0
      array.my_each do |item| sum += item end
      sum.should == 10
    end
  end
 
  describe "#my_map" do
    it "maps each value to a new value" do
      result = array.my_map { |item| item * 2 }
      result.should == [2,4,6,8]
    end
  end
 
  describe "#my_inject" do
    context "with an explicit initial" do
      it "injects an operation in the array" do
        result = array.my_inject(0) { |acc, item| acc + item }
        result.should == 10
      end
    end
 
    context "with an implicit initial" do
      it "injects an operation in the array" do
        result = array.my_inject { |acc, item| acc + item }
        result.should == 10
      end
    end
  end
end