title: How to avoid deprecation warning for stub_chain in RSpec 3.0?
body: <p>When I run a test with stub_chain, I'll get a deprecation warning.</p>
  
  <pre><code>describe "stubbing a chain of methods" do
    subject { Object.new }
  
    context "given symbols representing methods" do
      it "returns the correct value" do
        subject.stub_chain(:one, :two, :three).and_return(:four)
        expect(subject.one.two.three).to eq(:four)
      end
    end
  end
  </code></pre>
  
  <p>Deprecation Warnings:
  Using <code>stub_chain</code> from rspec-mocks' old <code>:should</code> syntax without explicitly enabling the syntax is deprecated. Use the new <code>:expect</code> syntax or explicitly enable <code>:should</code> instead.</p>
  
  <p>How this warning can be avoided?</p>