rspec inject examples

inject_spec.rb

C:\projects\ruby\enumerable\inject>rspec inject_spec.rb -fdoc

Enumerable#inject
  Array
    should respond to #inject
  Hash
    should respond to #inject
  0..100 (a Range)
    should respond to #inject
  with an explicit subject
    should respond to #inject
  when provided the name of a method as an argument
    should call that argument passing in each successive member

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5 examples, 0 failures


describe "Enumerable#inject" do

  context Array do
    it {should respond_to :inject}
  end

  context Hash do
    it {should respond_to :inject}
  end

  context (0..100), "(a Range)" do
    it {should respond_to :inject}
  end

  context "with an explicit subject" do
    subject {%w[first second third]}
    it {should respond_to :inject}
  end

  context "when provided the name of a method as an argument" do
    it "should call that argument passing in each successive member" do

      %w[this fine day].inject(:+).should == "thisfineday"

      accumulator = []
      %w[this fine day].inject(accumulator, :push)
      accumulator.should == ['this', 'fine', 'day']
    end
  end

end