Install and set up Buildkite Test Analytics

We're configuring Buildkite Test Analytics [1] to gather information
about our test suite so we can detect and fix flaky and slow tests.

We use the tagging feature [2] to annotate the combination of Ruby/Rails
versions, database engine, and the presence of paperclip.

1 - https://buildkite.com/test-analytics
2 - https://buildkite.com/docs/test-analytics/ruby-collectors#tagging-duplicate-test-executions-with-a-prefix-slash-suffix

.circleci/config.yml

@@ -259,6 +259,7 @@ jobs:
       DISABLE_ACTIVE_STORAGE: << parameters.paperclip >>
       RAILS_VERSION: "~> << parameters.rails >>"
       USE_LEGACY_EVENTS: << parameters.legacy >>
+      BUILDKITE_ANALYTICS_EXECUTION_NAME_PREFIX: "(<< parameters.ruby >>:<< parameters.rails >>:<< parameters.database >>:<< parameters.paperclip >>)"
     steps:
       - setup
       - when:

Gemfile

@@ -74,6 +74,8 @@ group :utils do
   gem 'gem-release', require: false
 end
 
+gem 'buildkite-test_collector', require: false, group: :test
+
 gem 'rspec_junit_formatter', require: false, group: :ci
 
 # Documentation

api/spec/spec_helper.rb

@@ -10,6 +10,9 @@
   SimpleCov.start('rails')
 end
 
+require 'spree/testing_support/buildkite_test_collector'
+Spree::TestingSupport::BuildkiteTestCollector.enable
+
 # This file is copied to spec/ when you run 'rails generate rspec:install'
 ENV["RAILS_ENV"] ||= 'test'
 

backend/spec/spec_helper.rb

@@ -10,6 +10,9 @@
   SimpleCov.start('rails')
 end
 
+require 'spree/testing_support/buildkite_test_collector'
+Spree::TestingSupport::BuildkiteTestCollector.enable
+
 # This file is copied to ~/spec when you run 'ruby script/generate rspec'
 # from the project root directory.
 ENV["RAILS_ENV"] ||= 'test'

core/lib/spree/testing_support/buildkite_test_collector.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require "buildkite/test_collector"
+
+module Spree
+  module TestingSupport
+    module BuildkiteTestCollector
+      def self.enable
+        Buildkite::TestCollector.configure(hook: :rspec)
+      end
+    end
+  end
+end

core/spec/spec_helper.rb

@@ -10,6 +10,9 @@
   SimpleCov.start('rails')
 end
 
+require 'spree/testing_support/buildkite_test_collector'
+Spree::TestingSupport::BuildkiteTestCollector.enable
+
 require 'rspec/core'
 
 require 'spree/testing_support/partial_double_verification'