Add rails specific environment boostrapping

lib/mutant/bootstrap.rb

@@ -31,6 +31,7 @@ module Bootstrap
  #
  # rubocop:disable Metrics/MethodLength
  def self.apply(world, config)
+ # TOOD: Have this behind a conditional.
  config = Rails.call(world, config)
 
  env = Env

lib/mutant/bootstrap/rails.rb

@@ -1,29 +1,49 @@
 module Mutant
  module Bootstrap
- module Rails
- def self.call(world, config)
+ class Rails
+ include Procto.call, Concord.new(:world, :config)
+
+ def call
  world.stdout.puts('Loading mutant config from rails environment')
 
- # TODO move to world.
+ # TODO add env to world.
+ #
+ # Make actual env configurable
  ENV['RAILS_ENV'] = 'test'
 
  world.kernel.require('./config/environment.rb')
 
  ::Rails.application.eager_load!
 
+ # TODO: preload engines, these *love* to pack things
+ # in the main project
+ #
+ # TODO: allow custom preload hooks.
+
+ add_rails_matchers
+ end
+
+ private
+
+ def add_rails_matchers
+ # This logic sucks, instead rails should be come a match expression
+ # possibly allow match expressions like: `ActionController.subclasses`
+ return config if config.matcher.match_expressions.any?
+
+ config.with(
+ matcher: config.matcher.with(match_expressions: rails_expressions)
+ )
+ end
+
+ def rails_expressions
  expressions = [
  ApplicationController,
  *ApplicationController.subclasses,
  ApplicationRecord,
  *ApplicationRecord.subclasses
  ].map { |klass| config.expression_parser.apply(klass.name).from_right }
-
- config.with(
- matcher: config.matcher.with(
- match_expressions: config.matcher.match_expressions | expressions
- )
- )
  end
+
  end # Rails
  end # Bootstrap
 end # Mutant

lib/mutant/matcher/config.rb

@@ -51,9 +51,10 @@ def add(attribute, value)
  # @return [Config]
  def merge(other)
  self.class.new(
- to_h
- .map { |name, value| [name, value + other.public_send(name)] }
- .to_h
+ ignore_expressions: other.ignore_expressions + ignore_expressions,
+ match_expressions: other.match_expressions,
+ start_expressions: other.start_expressions,
+ subject_filters: other.subject_filters + subject_filters
  )
  end