RSPEC Controller spec #CREATE

gistfile1.rb

describe "POST#create" do
  context "with valid attributes" do
    
    it "saves the new message in the database" do 
      expect{
        post :create, message: attributes_for(:message)
      }.to change(Message, :count).by(1)
    end
    
    it "redirects to the home page" do
      post :create, message: attributes_for(:message) 
      expect(response).to redirect_to root_url
    end 
  end
  
  context "with invalid attributes" do
    
    it "does not save the new message in the database" do
      expect{
        post :create, message: attributes_for(:invalid_message)
      }.to_not change(Message, :count)
    end
    
    it "re-renders the :new template" do 
      post :create, message: attributes_for(:invalid_message)
      expect(response).to render_template :new
    end 
  end
end