grocery_list_spec.rb

require_relative 'grocery_list'

describe GroceryList do
  # creates an object to use | consider: what's the scope of sunday_groceries?
  let(:sunday_groceries) { GroceryList.new }

  it 'creates a grocery list object' do
    expect(sunday_groceries).to be_instance_of GroceryList
  end

  it "has an empty list" do
    expect(sunday_groceries.list).to be_a Array
  end

# describe provides documentation | consider: what do you want to read in the command line about the tests?
  describe "adding things to a list" do
    describe "#add" do
      # opening of the test block
      it 'adds one new item to the list' do
        sunday_groceries.add("wine")
        # ACTUAL matched with (compared to) EXPECTED 
        expect(sunday_groceries.list).to include "wine"
      end
    end
  end

  describe "deleting items from the list" do
    describe "#remove" do
      it 'removes one item from the list' do
        sunday_groceries.add("wine")
        sunday_groceries.remove("wine")
        expect(sunday_groceries.list.length).to eq 0
      end
    end
  end

end