Configure rake specs in one place

So we don't have to add it to every rake spec file.

spec/base_spec_helper.rb

@@ -145,6 +145,10 @@ RSpec.configure do |config|
     config.default_formatter = "doc"
   end
 
+  config.define_derived_metadata(file_path: %r{/spec/lib/tasks/}) do |metadata|
+    metadata[:type] = :rake
+  end
+
   # Reset locale for all specs.
   config.around(:each) do |example|
     locale = ENV.fetch('LOCALE', 'en_TST')
@@ -245,6 +249,8 @@ RSpec.configure do |config|
   # You can use `rspec -n` to run only failed specs.
   config.example_status_persistence_file_path = "tmp/rspec-status.txt"
 
+  config.include_context "rake", type: :rake
+
   # Helpers
   config.include FactoryBot::Syntax::Methods
   config.include JsonSpec::Helpers

spec/lib/tasks/data/truncate_data_rake_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe 'truncate_data.rake' do
-  include_context "rake"
-
   describe ':truncate' do
     context 'when months_to_keep is specified' do
       it 'truncates order cycles closed earlier than months_to_keep months ago' do

spec/lib/tasks/enterprises_rake_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe 'enterprises.rake' do
-  include_context "rake"
-
   describe ':remove_enterprise' do
     context 'when the enterprises exists' do
       it 'removes the enterprise' do

spec/lib/tasks/import_product_images_rake_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe 'ofn:import:product_images' do
-  include_context "rake"
-
   describe 'task' do
     context "filename is blank" do
       it 'raises an error' do

spec/lib/tasks/reset_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe "reset.rake" do
-  include_context "rake"
-
   it "clears job queues" do
     job_class = Class.new do
       include Sidekiq::Job

spec/lib/tasks/sample_data_rake_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe 'sample_data.rake' do
-  include_context "rake"
-
   before do
     # Create seed data required by the sample data.
     create(:user)

spec/lib/tasks/simplecov_spec.rb

@@ -3,8 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe "simplecov.rake" do
-  include_context "rake"
-
   describe "simplecov:collate_results" do
     context "when there are reports to merge" do
       let(:input_dir) { Rails.root.join("spec/fixtures/simplecov") }

spec/lib/tasks/users_rake_spec.rb

@@ -4,8 +4,6 @@ require 'spec_helper'
 require 'rake'
 
 RSpec.describe 'users.rake' do
-  include_context "rake"
-
   describe ':remove_enterprise_limit' do
     context 'when the user exists' do
       let(:user) { create(:user) }

spec/support/shared_contexts/rake.rb

@@ -1,13 +1,6 @@
 # frozen_string_literal: true
 
-# Let this context take care of Rake testing gotchas.
-#
-# ```rb
-# RSpec.describe "my_task.rake" do
-#   include_context "rake"
-#   # ..
-# ```
-#
+# A shared context for all rake specs
 shared_context "rake" do
   before(:all) do
     # Make sure that Rake tasks are only loaded once.