transferred Code Ocean from original repository to GitHub

spec/support/database_cleaner.rb

@@ -0,0 +1,12 @@
+require 'database_cleaner'
+
+RSpec.configure do |config|
+  config.before(:suite) do
+    DatabaseCleaner.strategy = :transaction
+    DatabaseCleaner.clean_with(:truncation)
+  end
+
+  config.around(:each) do |example|
+    DatabaseCleaner.cleaning { example.run }
+  end
+end