ci: expand test coverage to Ruby 3.4 and Rails 7.2, fix RSpec hash formatting (#470)

* ci: add Ruby 3.4 and Rails 7.2 to test matrix

- Add Ruby 3.4 to the test matrix
- Add Gemfile.rails72 to test configurations

* test: fix hash output format compatibility across Ruby versions

- Replace hardcoded hash strings with dynamic hash.inspect in RSpec matcher tests
- Ensures test assertions work correctly with different Ruby hash formatting

Author: snaka

.github/workflows/ruby.yml

@@ -32,11 +32,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4']
         test: ['minitest', 'rspec']
         gemfile:
           - Gemfile.rails70
           - Gemfile.rails71
+          - Gemfile.rails72
           - Gemfile.rails80
           - Gemfile.railsmaster
           - Gemfile.mongo_mapper

Gemfile.rails72

@@ -0,0 +1,8 @@
+eval_gemfile('Gemfile.global')
+
+gem 'minitest', '~> 5.8'
+gem 'rails',    github: 'rails/rails', branch: '7-2-stable', require: false
+
+gem 'mongoid',  github: 'mongodb/mongoid'
+
+gem 'sqlite3', platforms: [:ruby, :mswin, :mingw]

spec/enumerize/integrations/rspec/matcher_spec.rb

@@ -107,14 +107,14 @@ def self.name
       end
 
       it 'rejects wrong keys' do
-        message = 'Expected Model to define enumerize :sex in: "{:boy=>0, :girl=>1}"'
+        message = "Expected Model to define enumerize :sex in: \"#{{boy: 0, girl: 1}.inspect}\""
         expect do
           expect(subject).to enumerize(:sex).in(boy: 0, girl: 1)
         end.to fail_with(message)
       end
 
       it 'rejects wrong values' do
-        message = 'Expected Model to define enumerize :sex in: "{:male=>2, :female=>3}"'
+        message = "Expected Model to define enumerize :sex in: \"#{{male: 2, female: 3}.inspect}\""
         expect do
         expect(subject).to enumerize(:sex).in(male: 2, female: 3)
         end.to fail_with(message)