precedence_spec.rb

describe "Operator precedence" do
  let(:a) { rand(100).to_f + 1 }
  let(:b) { rand(100) + 1 }

  describe "a + 1 / b + 1" do
    let(:c) { a + 1 / b + 1 }
  
    it "is not the same as (a + 1) / (b + 1)" do
      d = (a + 1) / (b + 1)
      d.should_not eql(c)
    end

    it "is the same as a + (1 / b) + 1" do
      d = a + (1 / b) + 1
      d.should eql(c)
    end
  end

  describe "a + 1 / b" do
    let(:c) { a + 1 / b }

    it "is not the same as (a + 1) / b" do
      d = (a + 1) / b
      d.should_not eql(c)
    end

    it "is the same as a + (1 / b)" do
      d = a + (1 / b)
      d.should eql(c)
    end
  end
end