upto 4.3: favourite style

Gemfile

@@ -70,6 +70,7 @@ group :test do
   gem "selenium-webdriver"
   gem "webdrivers"
   gem "rspec-rails"
+  gem "factory_bot_rails"
 end
 
 

Gemfile.lock

@@ -92,6 +92,11 @@ GEM
       reline (>= 0.3.1)
     diff-lcs (1.5.0)
     erubi (1.12.0)
+    factory_bot (6.2.1)
+      activesupport (>= 5.0.0)
+    factory_bot_rails (6.2.0)
+      factory_bot (~> 6.2.0)
+      railties (>= 5.0.0)
     globalid (1.1.0)
       activesupport (>= 5.0)
     i18n (1.13.0)
@@ -242,6 +247,7 @@ DEPENDENCIES
   bootsnap
   capybara
   debug
+  factory_bot_rails
   importmap-rails
   jbuilder
   pg

app/models/user.rb

@@ -18,4 +18,25 @@ class User < ApplicationRecord
 
     errors.add :password, "doesn't contain uppercase letter and a number"
   end
+
+  def favorite_style
+    # create hash with key being style name and value first 0 and then the score
+    styles = {}
+    self.ratings.each do |rating|
+      styles[rating.beer.style] = 0
+    end
+    self.ratings.each do |rating|
+      styles[rating.beer.style] += rating.score
+    end
+
+    # determine which style hast the most points
+    highest = {name: "", total: 0}
+    styles.each do |style|
+      if style[1] > highest[:total]
+        highest[:name] = style[0]
+        highest[:total] = style[1]
+      end
+    end
+    return highest[:name]
+  end
 end

spec/factories.rb

@@ -0,0 +1,24 @@
+FactoryBot.define do
+  factory :user do
+    username { "Möötti" }
+    password { "Unsecure1" }
+    password_confirmation { "Unsecure1" }
+  end
+
+  factory :brewery do
+    name { "Creative" }
+    year { 2023 }
+  end
+
+  factory :beer do
+    name { "Something good" }
+    style { "Yes" }
+    brewery
+  end
+
+  factory :rating do
+    score { 15 }
+    beer
+    user
+  end
+end

spec/models/user_spec.rb

@@ -27,4 +27,42 @@ RSpec.describe User, type: :model do
     expect(userMöötti).to_not be_valid
     expect(userMaatti).to_not be_valid
   end
+
+  describe "favourite_style" do
+    let(:user){ FactoryBot.create(:user) }
+    let(:brewery){ FactoryBot.create(:brewery) }
+
+    it "is defined method" do
+      expect(user).to respond_to(:favorite_style)
+    end
+
+    it "returns a string" do
+      expect(user.favorite_style).to be_a(String)
+    end
+
+    it "returns the most liked style" do
+      create_beer_with_many_ratings({user: user}, 10, 10, 20)
+      beer_with_favorite_style = FactoryBot.create(:beer, style: "No")
+      FactoryBot.create(:rating, beer: beer_with_favorite_style, score: 50, user: user)
+
+      expect(user.favorite_style).to eq "No"
+    end
+
+    it "also returns the most liked style" do
+      create_beer_with_many_ratings({user: user}, 20, 30, 20)
+      beer_with_favorite_style = FactoryBot.create(:beer, style: "No")
+      FactoryBot.create(:rating, beer: beer_with_favorite_style, score: 50, user: user)
+    end
+  end
+end
+
+def create_beer_with_rating(object, score)
+  beer = FactoryBot.create(:beer)
+  rating = FactoryBot.create(:rating, beer: beer, score: score, user: object[:user])
+end
+
+def create_beer_with_many_ratings(object, *scores)
+  scores.each do |score|
+    create_beer_with_rating(object, score)
+  end
 end