Use Full path to sqlite database in tests

railties/test/application/initializers/frameworks_test.rb

@@ -216,7 +216,7 @@ def from_bar_helper
         require "#{app_path}/config/environment"
         orig_database_url = ENV.delete("DATABASE_URL")
         orig_rails_env, Rails.env = Rails.env, 'development'
-        database_url_db_name = "db/database_url_db.sqlite3"
+        database_url_db_name = File.join(app_path, "db/database_url_db.sqlite3")
         ENV["DATABASE_URL"] = "sqlite3://:@localhost/#{database_url_db_name}"
         ActiveRecord::Base.establish_connection
         assert ActiveRecord::Base.connection

railties/test/application/rake/dbs_test.rb

@@ -16,11 +16,11 @@ def teardown
       end
 
       def database_url_db_name
-        "db/database_url_db.sqlite3"
+        File.join(app_path, "db/database_url_db.sqlite3")
       end
 
       def set_database_url
-        ENV['DATABASE_URL'] = "sqlite3://:@localhost/#{database_url_db_name}"
+        ENV['DATABASE_URL'] = File.join("sqlite3://:@localhost", database_url_db_name)
         # ensure it's using the DATABASE_URL
         FileUtils.rm_rf("#{app_path}/config/database.yml")
       end
@@ -60,7 +60,7 @@ def db_migrate_and_status
           `rails generate model book title:string;
            bundle exec rake db:migrate`
           output = `bundle exec rake db:migrate:status`
-          assert_match(/database:\s+\S+#{expected[:database]}/, output)
+          assert_match(%r{database:\s+\S*#{Regexp.escape(expected[:database])}}, output)
           assert_match(/up\s+\d{14}\s+Create books/, output)
         end
       end