Adds test for plugin autoload issue (#36320, #39834).

Patch by @tohosaku.

git-svn-id: https://svn.redmine.org/redmine/trunk@22522 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/application.rb

@@ -85,6 +85,9 @@ module RedmineApp
     # for more options (same options as config.cache_store).
     config.redmine_search_cache_store = :memory_store
 
+    # Sets default plugin directory
+    config.redmine_plugins_directory = 'plugins'
+
     # Configure log level here so that additional environment file
     # can change it (environments/ENV.rb would take precedence over it)
     config.log_level = Rails.env.production? ? :info : :debug

config/environments/test.rb

@@ -18,6 +18,12 @@ Rails.application.configure do
   # preloads Rails for running tests, you may have to set it to true.
   config.eager_load = false
 
+  # Change default plugins dir if env variable is present
+  # This is used by redmine plugins autoload test.
+  if ENV["REDMINE_PLUGINS_DIRECTORY"].present?
+    config.redmine_plugins_directory = ENV["REDMINE_PLUGINS_DIRECTORY"]
+  end
+
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {

lib/redmine/plugin_loader.rb

@@ -84,7 +84,7 @@ module Redmine
   class PluginLoader
     # Absolute path to the directory where plugins are located
     cattr_accessor :directory
-    self.directory = Rails.root.join('plugins')
+    self.directory = Rails.root.join Rails.application.config.redmine_plugins_directory
 
     # Absolute path to the public directory where plugins assets are copied
     cattr_accessor :public_directory

lib/tasks/testing.rake

@@ -114,4 +114,11 @@ namespace :test do
     Rails::TestUnit::Runner.run_from_rake 'test', FileList['test/integration/routing/*_test.rb'] + FileList['test/integration/api_test/*_routing_test.rb']
   end
   Rake::Task['test:routing'].comment = "Run the routing tests"
+
+  task(:autoload) do |t|
+    $: << "test"
+    ENV["REDMINE_PLUGINS_DIRECTORY"] = "test/fixtures/plugins"
+    Rails::TestUnit::Runner.run_from_rake 'test', FileList['test/autoload/*_test.rb']
+  end
+  Rake::Task['test:autoload'].comment = "Run the plugin autoload tests"
 end

test/autoload/plugin_autoload_test.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+# Redmine - project management software
+# Copyright (C) 2006-2023  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+require_relative '../test_helper'
+class Redmine::PluginAutoloadTest < ActiveSupport::TestCase
+  if ENV['REDMINE_PLUGINS_DIRECTORY']
+    def test_autoload
+      assert_equal true, Object.const_defined?(:Foo)
+    end
+  else
+    puts 'Tests related to plugin autoloading should be run separately using "rails test:autoload"'
+  end
+end

test/fixtures/plugins/foo_plugin/app/models/foo.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+class Foo < ActiveRecord::Base
+end