Add pagination option for all users and RSpec tests for cooresponding…

… Rspec Tests

Added a fourth option to display all users on a single page. Modified the per_page parameter to dynamically set the number of users per page based on user input or default values. Added tests for all pagination options to verify the functionality and behavior of the paginate_list method.

app/controllers/users_controller.rb

@@ -249,7 +249,7 @@ def role
 
   # For filtering the users list with proper search and pagination.
   def paginate_list
-    paginate_options = { '1' => 25, '2' => 50, '3' => 100 }
+    paginate_options = { '1' => 25, '2' => 50, '3' => 100, '4' => User.count}
 
     # If the above hash does not have a value for the key,
     # it means that we need to show all the users on the page
@@ -259,7 +259,11 @@ def paginate_list
 
     # The type of condition for the search depends on what the user has selected from the search_by dropdown
     @search_by = params[:search_by]
-    @per_page = 3
+
+    # Sets the number of users to display per page based on the 'per_page' parameter from the request.
+    # If no 'per_page' parameter is provided, it defaults to '4', which corresponds to displaying all users on one page.
+    @per_page = params[:per_page] || '4'
+
     # search for corresponding users
     # users = User.search_users(role, user_id, letter, @search_by)
 

spec/controllers/users_controller_spec.rb

@@ -392,4 +392,31 @@
       expect(response).to redirect_to('/tree_display/drill')
     end
   end
+
+  context '#paginate_list' do
+    before do
+      # Seed the database with a number of users for pagination tests
+      FactoryBot.create_list(:test_user, 110)
+    end
+
+    it 'displays 25 users per page when per_page is 25' do
+      get :list, params: { per_page: '1' }
+      expect(assigns(:paginated_users).length).to eq(25)
+    end
+
+    it 'displays 50 users per page when per_page is 50' do
+      get :list, params: { per_page: '2' }
+      expect(assigns(:paginated_users).length).to eq(50)
+    end
+
+    it 'displays 100 users per page when per_page is 100' do
+      get :list, params: { per_page: '3' }
+      expect(assigns(:paginated_users).length).to eq(100)
+    end
+
+    it 'displays all users on a single page when per_page is "all"' do
+      get :list, params: { per_page: '4' }
+      expect(assigns(:paginated_users).length).to eq(110)
+    end
+  end
 end

spec/factories/factories.rb

@@ -640,9 +640,9 @@
   end
 
   factory :test_user, class: User do
-    username 'username'
+    sequence(:username) { |n| "username#{n}" }
     name 'full name'
-    email 'abc@mailinator.com'
+    sequence(:email) { |n| "user#{n}@mailinator.com" }
   end
 
   factory :survey_deployment, class: SurveyDeployment do