upto 4.2: beer tests

app/models/beer.rb

@@ -6,6 +6,7 @@ class Beer < ApplicationRecord
   has_many :users, through: :ratings
 
   validates :name, presence: true
+  validates :style, presence: true
 
   def to_s
     "#{name}, #{(Brewery.find_by_id brewery_id).name}"

spec/models/beer_spec.rb

@@ -0,0 +1,26 @@
+require 'rails_helper'
+
+RSpec.describe Beer, type: :model do
+  describe "creation" do
+    let(:user){ User.create username: "Möötti", password: "Unsecure1"}
+    let(:brewery){ Brewery.create name: "Creative", year: 2023 }
+
+    it "is successful with correct parameters" do
+      beer = Beer.create name: "Hyvä juoma", style: "Yes", brewery_id: brewery.id
+      expect(beer).to be_valid
+      expect(beer.name).to eq "Hyvä juoma"
+      expect(beer.style).to eq "Yes"
+      expect(beer.brewery_id).to eq brewery.id
+    end
+
+    it "fails if no name is given" do
+      beer = Beer.create style: "No", brewery_id: brewery.id
+      expect(beer).to_not be_valid
+    end
+
+    it "fails if no style is given" do
+      beer = Beer.create name: "Möötti", brewery_id: brewery.id
+      expect(beer).to_not be_valid
+    end
+  end
+end