Display subcategory descriptions on browse page

[Finishes #179426091]

spec/factories.rb

@@ -1,10 +1,12 @@
 FactoryBot.define do
   factory :sqm_category do
     name { "A category" }
+    description { "A description of a category" }
   end
 
   factory :subcategory do
     name { "A subcategory" }
+    description { "A description of a subcategory" }
     sqm_category
 
     factory :subcategory_with_measures do

spec/presenters/category_presenter_spec.rb

@@ -5,7 +5,7 @@ describe CategoryPresenter do
     subcategory1 = Subcategory.new(name: 'A subcategory')
     subcategory2 = Subcategory.new(name: 'Another subcategory')
 
-    category = SqmCategory.new(name: 'Some Category', subcategories: [subcategory1, subcategory2])
+    category = SqmCategory.new(name: 'Some Category', description: 'Some category description', subcategories: [subcategory1, subcategory2])
     return CategoryPresenter.new(category: category, academic_year: AcademicYear.new, school: School.new)
   end
 
@@ -13,6 +13,10 @@ describe CategoryPresenter do
     expect(category_presenter.name).to eq 'Some Category'
   end
 
+  it 'returns the description of the category' do
+    expect(category_presenter.description).to eq 'Some category description'
+  end
+
   it 'maps subcategories to subcategory presenters' do
     expect(category_presenter.subcategories.map(&:name)).to eq ['A subcategory', 'Another subcategory']
   end

spec/presenters/subcategory_presenter_spec.rb

@@ -4,7 +4,7 @@ describe SubcategoryPresenter do
   let(:academic_year) { create(:academic_year, range: '1989-90') }
   let(:school) { create(:school, name: 'Best School') }
   let(:subcategory_presenter) do
-    subcategory = create(:subcategory, name: 'A great subcategory')
+    subcategory = create(:subcategory, name: 'A great subcategory', description: 'A great description')
 
     measure1 = create(:measure, watch_low_benchmark: 4, growth_low_benchmark: 4.25, approval_low_benchmark: 4.5, ideal_low_benchmark: 4.75, subcategory: subcategory)
     survey_item1 = create(:survey_item, measure: measure1)
@@ -25,6 +25,10 @@ describe SubcategoryPresenter do
     expect(subcategory_presenter.name).to eq 'A great subcategory'
   end
 
+  it 'returns the description of the subcategory' do
+    expect(subcategory_presenter.description).to eq 'A great description'
+  end
+
   it 'returns a gauge presenter responsible for the aggregate survey item response likert scores' do
     expect(subcategory_presenter.gauge_presenter.title).to eq 'Growth'
   end

spec/views/browse/show.html.erb_spec.rb

@@ -5,10 +5,10 @@ describe 'browse/show.html.erb' do
     academic_year = create(:academic_year, range: '1989-90')
     school = create(:school, name: 'Best School')
 
-    category = create(:sqm_category, name: 'Some Category')
+    category = create(:sqm_category, name: 'Some Category', description: 'Some description of the category')
 
-    subcategory1 = create(:subcategory, sqm_category: category, name: 'A subcategory')
-    subcategory2 = create(:subcategory_with_measures, sqm_category: category, name: 'Another subcategory')
+    subcategory1 = create(:subcategory, sqm_category: category, name: 'A subcategory', description: 'Some description of the subcategory')
+    subcategory2 = create(:subcategory_with_measures, sqm_category: category, name: 'Another subcategory', description: 'Another description of the subcategory')
 
     measure1 = create(:measure, subcategory: subcategory1, watch_low_benchmark: 1.5, growth_low_benchmark: 2.5, approval_low_benchmark: 3.5, ideal_low_benchmark: 4.5)
 
@@ -21,8 +21,9 @@ describe 'browse/show.html.erb' do
     render
   end
 
-  it 'renders the category name' do
+  it 'renders the category name and description' do
     expect(rendered).to match /Some Category/
+    expect(rendered).to match /Some description of the category/
   end
 
   context 'for each subcategory' do
@@ -31,6 +32,11 @@ describe 'browse/show.html.erb' do
       expect(rendered).to match /Another subcategory/
     end
 
+    it 'renders the subcategory description' do
+      expect(rendered).to match /Some description of the subcategory/
+      expect(rendered).to match /Another description of the subcategory/
+    end
+
     it 'renders the zone title and fill color for the gauge graph' do
       expect(rendered).to match /Growth/
       expect(rendered).to match /fill-growth/