Remove Mutant::Delegator

* And inline its semantics into the only inclusion side
* Add mutation covered specs

lib/mutant.rb

@@ -61,7 +61,6 @@ require 'mutant/actor/sender'
 require 'mutant/actor/mailbox'
 require 'mutant/actor/env'
 require 'mutant/parser'
-require 'mutant/delegator'
 require 'mutant/isolation'
 require 'mutant/parallel'
 require 'mutant/parallel/master'

lib/mutant/delegator.rb

@@ -1,43 +0,0 @@
-module Mutant
-  # A simple delegator with opinions
-  module Delegator
-    # Class level mixins
-    module ClassMethods
-
-    private
-
-      # Create delegators to object
-      #
-      # @return [undefined]
-      def delegate(*names)
-        names.each(&method(:define_delegator))
-      end
-
-      # Create delegator to object
-      #
-      # @param [Symbol] name
-      #
-      # @return [undefined]
-      def define_delegator(name)
-        fail "method #{name} already defined" if instance_methods.include?(name)
-        define_method(name) do
-          object.public_send(name)
-        end
-        private name
-      end
-
-    end # ClassMethods
-
-    # Hook called when module is included
-    #
-    # @param [Class,Module] host
-    #
-    # @return [undefined]
-    def self.included(host)
-      super
-
-      host.extend(ClassMethods)
-    end
-
-  end # Delegator
-end # Mutant

lib/mutant/reporter/cli/printer.rb

@@ -3,10 +3,34 @@ module Mutant
     class CLI
       # CLI runner status printer base class
       class Printer
-        include AbstractType, Delegator, Adamantium::Flat, Concord.new(:output, :object), Procto.call(:run)
+        include AbstractType,
+                Adamantium::Flat,
+                Concord.new(:output, :object),
+                Procto.call(:run)
 
         private_class_method :new
 
+        # Create delegators to object
+        #
+        # @return [undefined]
+        def self.delegate(*names)
+          names.each(&method(:define_delegator))
+        end
+        private_class_method :delegate
+
+        # Create delegator to object
+        #
+        # @param [Symbol] name
+        #
+        # @return [undefined]
+        def self.define_delegator(name)
+          define_method(name) do
+            object.public_send(name)
+          end
+          private(name)
+        end
+        private_class_method :define_delegator
+
         delegate :success?
 
         NL = "\n".freeze

spec/unit/mutant/reporter/cli/printer_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
   let(:tty?)       { true                                                     }
   let(:success?)   { true                                                     }
 
-  context '.call' do
+  describe '.call' do
     let(:class_under_test) do
       Class.new(described_class) do
         def run
@@ -30,7 +30,28 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
     it_reports "foo\n"
   end
 
-  context '#status' do
+  describe '.delegate' do
+    let(:reportable) { double(foo: :bar, baz: :boz) }
+
+    let(:class_under_test) do
+      Class.new(described_class) do
+        delegate :foo, :baz
+
+        def run
+          puts(foo)
+          puts(baz)
+        end
+      end
+    end
+
+    it_reports "bar\nboz\n"
+
+    it 'sets delegation methods to private visibility' do
+      expect(class_under_test.private_instance_methods).to include(:foo, :baz)
+    end
+  end
+
+  describe '#status' do
     let(:class_under_test) do
       Class.new(described_class) do
         def run
@@ -65,7 +86,7 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
     end
   end
 
-  context '#visit_collection' do
+  describe '#visit_collection' do
     let(:class_under_test) do
       reporter = nested_reporter
       Class.new(described_class) do
@@ -86,7 +107,7 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
     it_reports "foo\nbar\n"
   end
 
-  context '#visit' do
+  describe '#visit' do
     let(:class_under_test) do
       reporter = nested_reporter
       Class.new(described_class) do
@@ -107,7 +128,7 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
     it_reports "foo\n"
   end
 
-  context '#info' do
+  describe '#info' do
     let(:class_under_test) do
       Class.new(described_class) do
         def run
@@ -119,7 +140,7 @@ RSpec.describe Mutant::Reporter::CLI::Printer do
     it_reports "foo - bar\n"
   end
 
-  context '#colorize' do
+  describe '#colorize' do
     let(:class_under_test) do
       Class.new(described_class) do
         def run