Add Ruby 3.x to CI testing

.travis.yml

@@ -2,12 +2,15 @@ language: ruby
 script: bundle exec rake rspec
 bundler_args: --without development docs
 rvm:
-  - 2.2.4
   - 2.3.0
   - 2.4
   - 2.5
   - 2.6
   - 2.7
+  - 3.0
+  - 3.1
+  - 3.2
+  - 3.3
   - jruby-9.0.5.0
 jdk:
   - openjdk8
@@ -21,9 +24,17 @@ branches:
   only:
     - master
 before_install: |
-  # Install bundler < 2.0, see https://docs.travis-ci.com/user/languages/ruby/
-  gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
-  gem install bundler -v '< 2'
+  RUBY_MAJOR=$(echo "$TRAVIS_RUBY_VERSION" | cut -d. -f1)
+  RUBY_MINOR=$(echo "$TRAVIS_RUBY_VERSION" | cut -d. -f2)
+
+  if (( $RUBY_MAJOR >= 3 && $RUBY_MINOR >= 2)); then
+    # use travis default bundler
+  else
+    # Install bundler < 2.0, see https://docs.travis-ci.com/user/languages/ruby/
+    gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+    gem install bundler -v '< 2'
+  fi 
+
   if [[ k$TRAVIS_RUBY_VERSION = kjruby* ]] ; then
     # Hack the Gemfile.lock file to indicate we're a JRuby gem, to make bundler happy.
     sed -e 's/\(cassandra-driver [^)]*\)/\1-java/' -i"" Gemfile.lock

Gemfile.lock

@@ -36,13 +36,13 @@ GEM
     delorean (2.1.0)
       chronic
     diff-lcs (1.2.5)
-    docile (1.1.5)
+    docile (1.4.0)
     ffi (1.9.25)
     ffi (1.9.25-java)
     gherkin (3.2.0)
     ione (1.2.4)
-    json (1.8.6)
-    json (1.8.6-java)
+    json (2.7.2)
+    json (2.7.2-java)
     lz4-ruby (0.3.3)
     lz4-ruby (0.3.3-java)
     minitest (4.7.5)
@@ -59,6 +59,7 @@ GEM
     rake (13.0.1)
     rake-compiler (0.9.5)
       rake
+    rbtree (0.4.6)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -84,16 +85,21 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)
-    simplecov (0.11.2)
-      docile (~> 1.1.0)
-      json (~> 1.8)
+    set (1.1.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.0)
+    simplecov-html (0.10.2)
     snappy (0.0.14)
     snappy (0.0.14-java)
       snappy-jars (~> 1.1.0)
     snappy-jars (1.1.0.1.2-java)
     thor (0.19.1)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+    sorted_set (1.0.3-java)
     unicode-display_width (1.3.0)
     yard (0.9.20)
 

cassandra-driver.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.extra_rdoc_files = ['README.md']
   s.rdoc_options << '--title' << 'Datastax Ruby Driver' << '--main' << 'README.md' << '--line-numbers'
 
-  s.required_ruby_version = '>= 2.2.0'
+  s.required_ruby_version = '>= 2.3.0'
 
   if defined?(JRUBY_VERSION)
     s.platform = 'java'
@@ -31,6 +31,7 @@ Gem::Specification.new do |s|
   end
 
   s.add_runtime_dependency 'ione', '~> 1.2'
+  s.add_runtime_dependency 'sorted_set', '~> 1.0'
 
   s.add_development_dependency 'bundler', '~> 1.6'
   s.add_development_dependency 'rake', '~> 13.0'

spec/cassandra/protocol/coder_spec.rb

@@ -38,8 +38,14 @@ module Protocol
 
       describe('RUBY-128') do
         it 'reads very large short strings and string' do
-          column_specs = ::YAML::load(::File.open(::File.dirname(__FILE__) + "/cols.yml"))
-          buffer       = ::YAML::load(::File.open(::File.dirname(__FILE__) + "/buffer.yml"))
+          # https://bugs.ruby-lang.org/issues/17866
+          if RUBY_VERSION >= "3.1"
+            column_specs = ::YAML::unsafe_load(::File.open(::File.dirname(__FILE__) + "/cols.yml"))
+            buffer       = ::YAML::unsafe_load(::File.open(::File.dirname(__FILE__) + "/buffer.yml"))
+          else
+            column_specs = ::YAML::load(::File.open(::File.dirname(__FILE__) + "/cols.yml"))
+            buffer       = ::YAML::load(::File.open(::File.dirname(__FILE__) + "/buffer.yml"))
+          end
 
           Coder.read_values_v1(buffer, column_specs)
         end