Add channel spec generator

lib/generators/rspec/channel/channel_generator.rb

@@ -0,0 +1,12 @@
+require 'generators/rspec'
+
+module Rspec
+  module Generators
+    # @private
+    class ChannelGenerator < Base
+      def create_channel_spec
+        template 'channel_spec.rb.erb', File.join('spec/channels', class_path, "#{file_name}_channel_spec.rb")
+      end
+    end
+  end
+end

lib/generators/rspec/channel/templates/channel_spec.rb.erb

@@ -0,0 +1,7 @@
+require 'rails_helper'
+
+<% module_namespacing do -%>
+RSpec.describe <%= class_name %>Channel, <%= type_metatag(:channel) %> do
+  pending "add some examples to (or delete) #{__FILE__}"
+end
+<% end -%>

spec/generators/rspec/channel/channel_generator_spec.rb

@@ -0,0 +1,17 @@
+# Generators are not automatically loaded by Rails
+require "generators/rspec/channel/channel_generator"
+require 'support/generators'
+
+RSpec.describe Rspec::Generators::ChannelGenerator, :type => :generator, :skip => !RSpec::Rails::FeatureCheck.has_action_cable_testing? do
+  setup_default_destination
+
+  describe 'the generated files' do
+    before { run_generator %w(chat) }
+
+    subject { file("spec/channels/chat_channel_spec.rb") }
+
+    it { is_expected.to exist }
+    it { is_expected.to contain(/require 'rails_helper'/) }
+    it { is_expected.to contain(/describe ChatChannel, #{type_metatag(:channel)}/) }
+  end
+end