Migrate to minitest (#403)

* Migrate to minitest

Author: seuros

README.md

@@ -661,14 +661,27 @@ end
 
 ## Testing
 
-Closure tree is [tested under every valid combination](http://travis-ci.org/#!/ClosureTree/closure_tree) of
+Closure tree is [tested under every valid combination](https://github.com/ClosureTree/closure_tree/blob/master/.github/workflows/ci.yml) of
 
 * Ruby 2.7+
 * ActiveRecord 6.0+
 * PostgreSQL, MySQL, and SQLite. Concurrency tests are only run with MySQL and PostgreSQL.
 
-Assuming you're using [rbenv](https://github.com/sstephenson/rbenv), you can use ```tests.sh``` to
-run the test matrix locally.
+```shell
+$ bundle
+$ appraisal bundle # this will install the matrix of dependencies
+$ appraisal rake # this will run the tests in all combinations
+$ appraisal activerecord-7.0 rake # this will run the tests in AR 7.0 only
+$ appraisal activerecord-7.0 rake spec # this will run rspec in AR 7.0 only
+$ appraisal activerecord-7.0 rake test # this will run minitest in AR 7.0 only
+```
+
+By default the test are run with sqlite3 only. 
+You run test with other databases by passing the database url as environment variable:
+
+```shell
+$ DATABASE_URL=postgres://localhost/my_database appraisal activerecord-7.0 rake test 
+```
 
 ## Change log
 

Rakefile

@@ -2,12 +2,13 @@
 
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
+require 'rake/testtask'
 
 RSpec::Core::RakeTask.new(:spec) do |task|
   task.pattern = 'spec/closure_tree/*_spec.rb'
 end
 
-task default: :spec
+task default: [:spec, :test]
 
 namespace :spec do
   desc 'Run all spec variants'
@@ -27,6 +28,13 @@ namespace :spec do
   end
 end
 
+Rake::TestTask.new do |t|
+  t.libs.push 'lib'
+  t.libs.push 'test'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
 require 'github_changelog_generator/task'
 GitHubChangelogGenerator::RakeTask.new :changelog do |config|
   config.user = 'ClosureTree'

closure_tree.gemspec

@@ -27,6 +27,8 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'database_cleaner'
   gem.add_development_dependency 'generator_spec'
   gem.add_development_dependency 'parallel'
+  gem.add_development_dependency 'minitest'
+  gem.add_development_dependency 'minitest-reporters'
   gem.add_development_dependency 'rspec-instafail'
   gem.add_development_dependency 'rspec-rails'
   gem.add_development_dependency 'simplecov'

spec/closure_tree/model_spec.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+describe '#_ct' do
+  it 'should delegate to the Support instance on the class' do
+    assert_equal Tag._ct, Tag.new._ct
+  end
+end

test/closure_tree/model_test.rb

@@ -0,0 +1,53 @@
+require 'erb'
+require 'active_record'
+require 'with_advisory_lock'
+require 'tmpdir'
+require 'securerandom'
+require 'minitest'
+require 'minitest/autorun'
+
+ActiveRecord::Base.configurations = {
+  default_env: {
+    url: ENV.fetch('DATABASE_URL', "sqlite3://#{Dir.tmpdir}/#{SecureRandom.hex}.sqlite3"),
+    properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+  }
+}
+
+ENV['WITH_ADVISORY_LOCK_PREFIX'] ||= SecureRandom.hex
+
+ActiveRecord::Base.establish_connection
+
+def env_db
+  @env_db ||= if ActiveRecord::Base.respond_to?(:connection_db_config)
+                ActiveRecord::Base.connection_db_config.adapter
+              else
+                ActiveRecord::Base.connection_config[:adapter]
+              end.to_sym
+end
+
+ActiveRecord::Migration.verbose = false
+ActiveRecord::Base.table_name_prefix = ENV['DB_PREFIX'].to_s
+ActiveRecord::Base.table_name_suffix = ENV['DB_SUFFIX'].to_s
+ActiveRecord::Base.establish_connection
+
+def env_db
+  @env_db ||= if ActiveRecord::Base.respond_to?(:connection_db_config)
+                ActiveRecord::Base.connection_db_config.adapter
+              else
+                ActiveRecord::Base.connection_config[:adapter]
+              end.to_sym
+end
+
+# Use in specs to skip some tests
+def sqlite?
+  env_db == :sqlite3
+end
+
+ENV['WITH_ADVISORY_LOCK_PREFIX'] ||= SecureRandom.hex
+
+ActiveRecord::Base.connection.recreate_database("closure_tree_test") unless sqlite?
+puts "Testing with #{env_db} database, ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
+
+require 'closure_tree'
+require_relative '../spec/support/schema'
+require_relative '../spec/support/models'