Add test GitHub Actions CI workflow

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y ffmpeg
+          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+          brew install taglib
+          echo "PKG_CONFIG_PATH=$(brew --prefix taglib)/lib/pkgconfig" >> $GITHUB_ENV
+          echo "LIBRARY_PATH=$(brew --prefix taglib)/lib" >> $GITHUB_ENV
+          echo "CPATH=$(brew --prefix taglib)/include" >> $GITHUB_ENV
+          echo "LD_LIBRARY_PATH=$(brew --prefix taglib)/lib" >> $GITHUB_ENV
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bundle exec rake test

.rubocop.yml

@@ -1,7 +1,7 @@
 AllCops:
   NewCops: enable
   SuggestExtensions: false
-  TargetRubyVersion: 3.1
+  TargetRubyVersion: 3.3
 
 Style/Documentation:
   Enabled: false

test/wavesync/file_converter_test.rb

@@ -54,7 +54,8 @@ def teardown
       FileUtils.touch(source_aiff)
       FileUtils.touch(File.join(@target_dir, 'track.mp3'))
 
-      audio = stub(bpm: nil)
+      Audio.any_instance.stubs(:duration).returns(0)
+      audio = stub(bpm: nil, duration: 0)
       source_format = AudioFormat.new(file_type: 'aiff', sample_rate: 44_100, bit_depth: 16)
       target_format = AudioFormat.new(file_type: 'mp3', sample_rate: nil, bit_depth: nil)
       result = @converter.convert(audio, source_aiff, @path_resolver, source_format, target_format)

wavesync.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.metadata['rubygems_mfa_required'] = 'true'
   spec.license = 'MIT'
 
-  spec.required_ruby_version = '>= 3.1'
+  spec.required_ruby_version = '>= 3.3'
 
   spec.files         = Dir['lib/**/*.rb', 'bin/*', 'config/**/*', 'LICENSE', 'README.md']
   spec.bindir        = 'bin'