Fallback to kicks gem for version check in SneakersSpy

Gemfile

@@ -168,7 +168,13 @@ end
 
 # sneakers main only supports >=2.5.0
 if Gem::Version.create(RUBY_VERSION) >= Gem::Version.create('2.5.0') && !defined?(JRUBY_VERSION)
-  gem 'sneakers', github: 'jondot/sneakers', ref: 'd761dfe1493', require: nil
+  # The sneakers gem was renamed to kicks, which SneakersSpy also instruments.
+  # Set SNEAKERS_GEM=kicks to run the suite against it instead.
+  if ENV['SNEAKERS_GEM'] == 'kicks'
+    gem 'kicks', '>= 2.12.0', require: nil
+  else
+    gem 'sneakers', github: 'jondot/sneakers', ref: 'd761dfe1493', require: nil
+  end
 end
 
 if Gem::Version.create(RUBY_VERSION) <= Gem::Version.create('2.5.0')

lib/elastic_apm/spies/sneakers.rb

@@ -24,8 +24,11 @@ module Spies
     class SneakersSpy
       include Logging
 
+      # The sneakers gem was renamed to kicks, which still ships
+      # `lib/sneakers.rb` but registers under a different gem name.
       def self.supported_version?
-        Gem.loaded_specs['sneakers'].version >= Gem::Version.create('2.12.0')
+        spec = Gem.loaded_specs['sneakers'] || Gem.loaded_specs['kicks']
+        spec && spec.version >= Gem::Version.create('2.12.0')
       end
 
       def install

spec/elastic_apm/spies/sneakers_spec.rb

@@ -18,9 +18,18 @@
 # frozen_string_literal: true
 
 require 'spec_helper'
-unless Gem::Specification.find_all_by_name('sneakers', '>=2.12.0').empty? || defined?(JRUBY_VERSION)
+require 'elastic_apm/spies/sneakers'
+
+# The sneakers gem was renamed to kicks. Both ship `lib/sneakers.rb` and define
+# the `Sneakers` constant, but register under different gem names, so either one
+# satisfies the spy.
+queue_gem_bundled =
+  !defined?(JRUBY_VERSION) &&
+  !(Gem::Specification.find_all_by_name('sneakers', '>=2.12.0') +
+    Gem::Specification.find_all_by_name('kicks', '>=2.12.0')).empty?
+
+if queue_gem_bundled
   require 'sneakers'
-  require 'elastic_apm/spies/sneakers'
 
   module ElasticAPM
     RSpec.describe 'Spy: Sneakers', :intercept do
@@ -70,6 +79,10 @@ def work(_message)
         Sneakers.logger = Logger.new(nil) # silence
       end
 
+      it 'supports the version of the gem in the bundle' do
+        expect(Spies::SneakersSpy.supported_version?).to be_truthy
+      end
+
       it 'instruments job transaction' do
         with_agent do
           worker = TestWorker.new
@@ -108,4 +121,15 @@ def work(_message)
       end
     end
   end
-end
+elsif Gem.loaded_specs['sneakers'].nil? && Gem.loaded_specs['kicks'].nil?
+  # Neither gem is in the bundle (eg. JRuby, or Ruby below 2.5), so the spy has
+  # no gem spec to read a version from. It has to report the version as
+  # unsupported rather than raise.
+  module ElasticAPM
+    RSpec.describe 'Spy: Sneakers' do
+      it 'is unsupported when neither sneakers nor kicks is bundled' do
+        expect(Spies::SneakersSpy.supported_version?).to be_falsey
+      end
+    end
+  end
+end