Refactor EBacc subjects

This refactors how we determine whether a subject is an EBacc subject.

app/models/subject.rb

@@ -3,40 +3,8 @@
 class Subject
   include ActiveModel::Model
 
-  attr_accessor :value, :name
-
-  def ebacc?
-    EBACC_VALUES.include?(value)
-  end
-
-  EBACC_VALUES = %w[
-    applied_biology
-    ancient_hebrew
-    applied_chemistry
-    applied_physics
-    arabic_languages
-    biology
-    chinese_languages
-    computer_science
-    english_studies
-    environmental_sciences
-    french_language
-    general_sciences
-    geography
-    german_language
-    history
-    italian_language
-    latin_language
-    materials_science
-    mathematics
-    portuguese_language
-    spanish_language
-    statistics
-    modern_languages
-    russian_languages
-    physics
-    chemistry
-  ].freeze
+  attr_accessor :value, :name, :ebacc
+  alias_method :ebacc?, :ebacc
 
   class << self
     def all
@@ -50,83 +18,92 @@ def find(values)
     private
 
     def create(value:)
-      Subject.new(value:, name: I18n.t("subjects.#{value}"))
+      Subject.new(
+        value:,
+        name: I18n.t("subjects.#{value}"),
+        ebacc: EBACC_VALUES.include?(value),
+      )
     end
 
-    ALL_VALUES = %w[
+    EBACC_VALUES = %w[
       ancient_hebrew
       applied_biology
       applied_chemistry
-      applied_computing
       applied_physics
       arabic_languages
-      art_and_design
       biology
+      chemistry
+      chinese_languages
+      computer_science
+      english_studies
+      environmental_sciences
+      french_language
+      general_sciences
+      geography
+      german_language
+      history
+      italian_language
+      latin_language
+      materials_science
+      mathematics
+      modern_languages
+      physics
+      portuguese_language
+      russian_languages
+      spanish_language
+      statistics
+    ].freeze
+
+    NON_EBACC_VALUES = %w[
+      applied_computing
+      art_and_design
       business_management
       business_studies
-      chemistry
       child_development
-      chinese_languages
       citizenship
       classical_greek_studies
       classical_studies
-      computer_science
       construction_and_the_built_environment
       dance
       design
       design_and_technology
       drama
       early_years_teaching
       economics
-      english_studies
-      environmental_sciences
       food_and_beverage_studies
-      french_language
       general_or_integrated_engineering
-      general_sciences
-      geography
-      german_language
       graphic_design
       hair_and_beauty_sciences
       health_and_social_care
       health_studies
       historical_linguistics
-      history
       hospitality
       information_technology
-      italian_language
-      latin_language
       law
       manufacturing_engineering
-      materials_science
-      mathematics
       media_and_communication_studies
-      modern_languages
       music_education_and_teaching
       performing_arts
       philosophy
       physical_education
-      physics
-      portuguese_language
       primary_teaching
-      production_and_manufacturing_engineering
       product_design
+      production_and_manufacturing_engineering
       psychology
       public_services
       recreation_and_leisure_studies
       religious_studies
       retail_management
-      russian_languages
       social_sciences
-      spanish_language
       specialist_teaching_primary_with_mathematics
-      sports_management
       sport_and_exercise_sciences
-      statistics
+      sports_management
       textiles_technology
       travel_and_tourism
       uk_government_parliamentary_studies
       welsh_language
     ].freeze
+
+    ALL_VALUES = (EBACC_VALUES + NON_EBACC_VALUES).sort
   end
 end

spec/models/subject_spec.rb

@@ -18,4 +18,18 @@
       expect(find.second.value).to eq("economics")
     end
   end
+
+  describe "#ebacc?" do
+    subject(:ebacc?) { described_class.find([value]).first.ebacc? }
+
+    context "with an EBacc subject" do
+      let(:value) { "ancient_hebrew" }
+      it { is_expected.to be true }
+    end
+
+    context "with a non-EBacc subject" do
+      let(:value) { "applied_computing" }
+      it { is_expected.to be false }
+    end
+  end
 end