#13 fresh versions

.rubocop.yml

@@ -1,6 +1,8 @@
 AllCops:
   DisplayCopNames: true
   TargetRubyVersion: 2.3.3
+  NewCops: enable
+  SuggestExtensions: false
 
 Layout/EmptyLineAfterGuardClause:
   Enabled: false

Gemfile

@@ -22,3 +22,11 @@
 
 source 'https://rubygems.org'
 gemspec
+
+gem 'minitest', '5.18.0', require: false
+gem 'rake', '13.0.6', require: false
+gem 'rdoc', '6.5.0', require: false
+gem 'rubocop', '1.51.0', require: false
+gem 'rubocop-rspec', '2.22.0', require: false
+gem 'simplecov', '0.22.0', require: false
+gem 'threads', '0.3.0', require: false

lib/random-port/pool.rb

@@ -98,7 +98,7 @@ def acquire(total = 1, timeout: 4)
         end
         next if opts.any? { |p| @ports.include?(p) }
         d = total * (total - 1) / 2
-        next unless opts.inject(&:+) - total * opts.min == d
+        next unless opts.inject(&:+) - (total * opts.min) == d
         @ports += opts
         opts
       end
@@ -133,9 +133,9 @@ def take(opt = 0)
     p
   end
 
-  def safe
+  def safe(&block)
     if @sync
-      @monitor.synchronize { yield }
+      @monitor.synchronize(&block)
     else
       yield
     end

random-port.gemspec

@@ -24,11 +24,7 @@
 
 require 'English'
 Gem::Specification.new do |s|
-  s.specification_version = 2 if s.respond_to? :specification_version=
-  if s.respond_to? :required_rubygems_version=
-    s.required_rubygems_version = Gem::Requirement.new('>= 0')
-  end
-  s.rubygems_version = '2.3.3'
+  s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
   s.required_ruby_version = '>=2.3'
   s.name = 'random-port'
   s.version = '0.0.0'
@@ -39,14 +35,7 @@ Gem::Specification.new do |s|
   s.email = 'yegor256@gmail.com'
   s.homepage = 'http://github.com/yegor256/random-port'
   s.files = `git ls-files`.split($RS)
-  s.test_files = s.files.grep(%r{^(test)/})
   s.rdoc_options = ['--charset=UTF-8']
   s.extra_rdoc_files = ['README.md']
-  s.add_development_dependency 'codecov', '0.1.10'
-  s.add_development_dependency 'minitest', '5.11.3'
-  s.add_development_dependency 'rake', '12.3.1'
-  s.add_development_dependency 'rdoc', '4.3.0'
-  s.add_development_dependency 'rubocop', '0.58.1'
-  s.add_development_dependency 'rubocop-rspec', '1.27.0'
-  s.add_development_dependency 'threads', '0.3.0'
+  s.metadata['rubygems_mfa_required'] = 'true'
 end

test/test__helper.rb

@@ -20,13 +20,8 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-STDOUT.sync = true
+$stdout.sync = true
 
 require 'simplecov'
 SimpleCov.start
-if ENV['CI'] == 'true'
-  require 'codecov'
-  SimpleCov.formatter = SimpleCov::Formatter::Codecov
-end
-
 require 'minitest/autorun'