Test on Ruby 3.4, drop Ruby 2.7

.github/workflows/rubocop.yml

@@ -13,6 +13,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.3
+          ruby-version: 3.4
       - run: bundle install
       - run: bundle exec rake -t rubocop

.github/workflows/test.yml

@@ -15,11 +15,11 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         version:
           [
-            2.7,
             '3.0',
             3.1,
             3.2,
             3.3,
+            3.4,
             jruby,
           ]
         exclude:

.rubocop.yml

@@ -1,7 +1,7 @@
 require: rubocop-performance
 
 AllCops:
-    TargetRubyVersion: 2.7
+    TargetRubyVersion: '3.0'
     NewCops: enable
 
 # Metrics are too arbitrary.

CHANGELOG.md

@@ -2,8 +2,8 @@
 
 ## 1.3.0
 
-* Ruby 2.5 and 2.6 are no longer supported. If you're using one of these
-  versions, please use version 1.2.0 of this gem.
+* Ruby 3.0+ is now required. If you're using Ruby 2.5, 2.6, or 2.7, please
+  use version 1.2.0 of this gem.
 
 ## 1.2.0 (2023-11-22)
 

README.md

@@ -35,7 +35,7 @@ For more information see the
 
 ## Requirements
 
-This code requires Ruby version 2.7 or higher.
+This code requires Ruby version 3.0 or higher.
 
 ## Contributing
 

maxmind-db.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
     'source_code_uri' => 'https://github.com/maxmind/MaxMind-DB-Reader-ruby',
     'rubygems_mfa_required' => 'true',
   }
-  s.required_ruby_version = '>= 2.7.0'
+  s.required_ruby_version = '>= 3.0'
 
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'rake'

test/test_decoder.rb

@@ -211,11 +211,9 @@ def test_uint128
   end
 
   def validate_type_decoding(type, tests)
-    values = []
-    tests.each do |input, expected|
-      values << check_decoding(type, input, expected)
+    tests.map do |input, expected|
+      check_decoding(type, input, expected)
     end
-    values
   end
 
   def check_decoding(type, input, expected, name = nil)

test/test_reader.rb

@@ -316,10 +316,9 @@ def test_metadata_unknown_attribute
     reader = MaxMind::DB.new(
       'test/data/test-data/MaxMind-DB-test-decoder.mmdb'
     )
-    e = assert_raises NoMethodError do
+    assert_raises NoMethodError do
       reader.metadata.what
     end
-    assert(e.message.include?('undefined method `what\''))
     reader.close
   end