Fix generator spec generator

features/generator_specs/generator_specs.feature

@@ -0,0 +1,16 @@
+Feature: Generator spec
+
+    RSpec spec(s) can be generated when generating application components. For instance, `rails generate model` will also generate an RSpec spec file for the model but you can also write your own generator. See [customizing your workflow](https://guides.rubyonrails.org/generators.html#customizing-your-workflow)
+
+    Scenario: Use custom generator
+        When I run `bundle exec rails generate generator my_generator`
+        Then the features should pass
+        Then the output should contain:
+          """
+                create  lib/generators/my_generator
+                create  lib/generators/my_generator/my_generator_generator.rb
+                create  lib/generators/my_generator/USAGE
+                create  lib/generators/my_generator/templates
+                invoke  rspec
+                create    spec/generator/my_generators_generator_spec.rb
+          """

lib/generators/rspec/generators/generator_generator.rb → lib/generators/rspec/generator/generator_generator.rb

@@ -3,8 +3,8 @@
 module Rspec
   module Generators
     # @private
-    class GeneratorsGenerator < Base
-      class_option :generator_specs, type: :boolean, default: false,  desc: "Generate generator specs"
+    class GeneratorGenerator < Base
+      class_option :generator_specs, type: :boolean, default: true,  desc: "Generate generator specs"
 
       def generate_generator_spec
         return unless options[:generator_specs]

spec/generators/rspec/generator/generator_generator_spec.rb

@@ -0,0 +1,22 @@
+require 'generators/rspec/generator/generator_generator'
+require 'support/generators'
+
+RSpec.describe Rspec::Generators::GeneratorGenerator, :type => :generator do
+  setup_default_destination
+
+  describe "generator specs" do
+    subject(:generator_spec) { file("spec/generator/posts_generator_spec.rb") }
+    before do
+      run_generator %w(posts)
+    end
+    it "creates the spec file by default" do
+      expect(generator_spec).to exist
+    end
+    it "contains 'rails_helper in the spec file'" do
+      expect(generator_spec).to contain(/require 'rails_helper'/)
+    end
+    it "includes the generator type in the metadata" do
+      expect(generator_spec).to contain(/^RSpec.describe \"Posts\", #{type_metatag(:generator)}/)
+    end
+  end
+end