class Cucumber::Core::Event

Public Class Methods

event_id() click to toggle source

@return [Symbol] the underscored name of the class to be used as the key in an event registry

# File lib/cucumber/core/event.rb, line 42
def event_id
  underscore(name.split('::').last).to_sym
end
new(*events) click to toggle source

Macro to generate new sub-classes of {Event} with attribute readers.

Calls superclass method
# File lib/cucumber/core/event.rb, line 8
def self.new(*events)
  # Use normal constructor for subclasses of Event
  return super if ancestors.index(Event) > 0

  Class.new(Event) do
    # NB: We need to use metaprogramming here instead of direct variable obtainment
    # because JRuby does not guarantee the order in which variables are defined is equivalent
    # to the order in which they are obtainable
    #
    # See https://github.com/jruby/jruby/issues/7988 for more info
    attr_reader(*events)

    define_method(:initialize) do |*attributes|
      events.zip(attributes) do |name, value|
        instance_variable_set("@#{name}".to_sym, value)
      end
    end

    define_method(:attributes) do
      events.map { |var| instance_variable_get(:"@#{var}") }
    end

    define_method(:to_h) do
      events.zip(attributes).to_h
    end

    def event_id
      self.class.event_id
    end
  end
end

Private Class Methods

underscore(string) click to toggle source
# File lib/cucumber/core/event.rb, line 48
def underscore(string)
  string
    .to_s
    .gsub('::', '/').
    gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
    gsub(/([a-z\d])([A-Z])/, '\1_\2').
    tr('-', '_').
    downcase
end

Public Instance Methods

event_id() click to toggle source
# File lib/cucumber/core/event.rb, line 34
def event_id
  self.class.event_id
end