Class: ActiveMutator::Worker

Inherits:
Object
  • Object
show all
Defined in:
lib/active_mutator/worker.rb

Overview

Runs INSIDE a fork. Order is critical: RSpec's setup phase loads the spec files, whose spec_helper/rails_helper loads the application — only THEN can the mutation be inserted over the loaded original. Insert-first would NameError on any project not preloaded in the parent (all non-Rails projects), and loading app code after insertion would silently restore the original method.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mutation, example_ids, writer) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/active_mutator/worker.rb', line 16

def initialize(mutation, example_ids, writer)
  @mutation = mutation
  @example_ids = example_ids
  @writer = writer
end

Class Method Details

.run(mutation, example_ids, writer) ⇒ Object 



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# File 'lib/active_mutator/worker.rb', line 12

def self.run(mutation, example_ids, writer)
  new(mutation, example_ids, writer).run
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/active_mutator/worker.rb', line 22

def run
  require "rspec/core"
  devnull = File.open(File::NULL, "w")
  runner = RSpec::Core::Runner.new(RSpec::Core::ConfigurationOptions.new(@example_ids))
  runner.setup(devnull, devnull)   # loads spec files -> loads the app
  Inserter.new.insert(@mutation)   # now the target constant exists
  after_fork_hygiene
  code = runner.run_specs(covering_groups)
  emit(code.zero? ? "survived" : "killed")
rescue StandardError, ScriptError => e
  emit("error", details: "#{e.class}: #{e.message}")
end