class RSpec::Core::Formatters::Protocol
This class isn’t loaded at runtime but serves to document all of the notifications implemented as part of the standard interface. The reporter will issue these during a normal test suite run, but a formatter will only receive those notifications it has registered itself to receive. To register a formatter call:
‘::RSpec::Core::Formatters.register class, :list, :of, :notifications`
e.g.
‘::RSpec::Core::Formatters.register self, :start, :example_started`
@see RSpec::Core::Formatters::BaseFormatter
@see RSpec::Core::Formatters::BaseTextFormatter
@see RSpec::Core::Reporter