RSPEC Controller spec #UPDATE

gistfile1.rb

describe 'PUT#update' do 
  before :each do
    @message = create(:message, name: "Aaron Sumner",
      email: "[email protected]")
  end
  
  it "locates the requested @message" do
    put :update, id: @message, message: attributes_for(:message) 
    expect(assigns(:message)).to eq(@message)
  end
  
  context "valid attributes" do
    it "changes @message's attributes" do
      put :update, id: @message, message: attributes_for(:message, firstname: "A. Sumner")
      @message.reload
      expect(@message.name).to eq("A. Sumner")
    end
    
    it "redirects to the updated message" do
      put :update, id: @message, message: attributes_for(:message)
      response.should redirect_to @message
      expect(response).to redirect_to @message
    end
  end

  context "invalid attributes" do
    it "does not change @message's attributes" do
      put :update, id: @message, message: attributes_for(:message, name: "None of your business", email: nil) 
      @message.reload
      expect(@message.name).to eq("None of your business")
    end

    it "re-renders the edit method" do
      put :update, id: @message, message: attributes_for(:invalid_message) 
      expect(response).to render_template :edit
    end
  end
end