Add more test cases

spec/requests/users/destroy_spec.rb

@@ -3,25 +3,59 @@
 require 'rails_helper'
 
 RSpec.describe 'DELETE /users' do
-  let(:current_account) { create :usual_account }
-
   def make_request
     delete '/users'
   end
 
   before do
-    sign_in current_account.user
+    sign_in current_account.user if current_account&.user
   end
 
-  specify do
-    expect { make_request }.not_to change(User, :count)
-  end
-
-  context 'after request' do
-    before { make_request }
+  context 'when guest account is authenticated' do
+    let(:current_account) { create :guest_account }
 
     specify do
-      expect(response).to have_http_status :method_not_allowed
+      expect { make_request }.not_to change(User, :count)
+    end
+
+    context 'after request' do
+      before { make_request }
+
+      specify do
+        expect(response).to redirect_to new_user_session_url
+      end
+    end
+  end
+
+  context 'when usual account is authenticated' do
+    let(:current_account) { create :usual_account }
+
+    specify do
+      expect { make_request }.not_to change(User, :count)
+    end
+
+    context 'after request' do
+      before { make_request }
+
+      specify do
+        expect(response).to have_http_status :method_not_allowed
+      end
+    end
+  end
+
+  context 'when superuser account is authenticated' do
+    let(:current_account) { create :superuser_account }
+
+    specify do
+      expect { make_request }.not_to change(User, :count)
+    end
+
+    context 'after request' do
+      before { make_request }
+
+      specify do
+        expect(response).to have_http_status :method_not_allowed
+      end
     end
   end
 end