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rails--rails/activerecord/test/support/connection_helper.rb

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module ConnectionHelper
def run_without_connection
original_connection = ActiveRecord::Base.remove_connection
yield original_connection
ensure
ActiveRecord::Base.establish_connection(original_connection)
end
# Used to drop all cache query plans in tests.
def reset_connection
original_connection = ActiveRecord::Base.remove_connection
ActiveRecord::Base.establish_connection(original_connection)
end
end