Does not create a dev:copy_db:geo task

lib/tasks/dev.rake

@@ -30,8 +30,10 @@ namespace :dev do
   databases = ActiveRecord::Tasks::DatabaseTasks.setup_initial_database_yaml
 
   namespace :copy_db do
+    ALLOWED_DATABASES = %w[ci].freeze
+
     ActiveRecord::Tasks::DatabaseTasks.for_each(databases) do |name|
-      next if name == 'main'
+      next unless ALLOWED_DATABASES.include?(name)
 
       desc "Copies the #{name} database from the main database"
       task name => :environment do

spec/tasks/dev_rake_spec.rb

@@ -40,10 +40,14 @@ RSpec.describe 'dev rake tasks' do
     end
   end
 
-  describe 'copy_db:ci' do
+  context 'multiple databases' do
     before do
       skip_if_multiple_databases_not_setup
+    end
 
+    context 'with a valid database' do
+      describe 'copy_db:ci' do
+        before do
           configurations = instance_double(ActiveRecord::DatabaseConfigurations)
           allow(ActiveRecord::Base).to receive(:configurations).and_return(configurations)
           allow(configurations).to receive(:configs_for).with(env_name: Rails.env, name: 'ci').and_return(ci_configuration)
@@ -70,4 +74,12 @@ RSpec.describe 'dev rake tasks' do
           end
         end
       end
+    end
+
+    context 'with an invalid database' do
+      it 'raises an error' do
+        expect { run_rake_task('dev:copy_db:foo') }.to raise_error(RuntimeError, /Don't know how to build task/)
+      end
+    end
+  end
 end