`ActiveRecord::Tasks::DatabaseTasks.load_schema` has always to establish database connection

  When load schema from `structure.sql`, database connection isn't
  established. `ActiveRecord::Tasks::DatabaseTasks.load_schema` has to
  establish database connection since it executes
  ```
  ActiveRecord::InternalMetadata.create_table
  ActiveRecord::InternalMetadata[:environment] = environment
  ```

1 files changed, 8 insertions, 0 deletions

diff --git a/railties/test/application/rake/dbs_test.rb b/railties/test/application/rake/dbs_test.rb
index 3057a0a3fb..fd22477539 100644
--- a/railties/test/application/rake/dbs_test.rb
+++ b/railties/test/application/rake/dbs_test.rb
@@ -189,6 +189,14 @@ module ApplicationTests
         db_structure_dump_and_load database_url_db_name
       end
 
+      test "db:structure:dump and db:structure:load set ar_internal_metadata" do
+        require "#{app_path}/config/environment"
+        db_structure_dump_and_load ActiveRecord::Base.configurations[Rails.env]["database"]
+
+        assert_equal "test", rails("runner", "-e", "test", "puts ActiveRecord::InternalMetadata[:environment]").strip
+        assert_equal "development", rails("runner", "puts ActiveRecord::InternalMetadata[:environment]").strip
+      end
+
       test "db:structure:dump does not dump schema information when no migrations are used" do
         # create table without migrations
         rails "runner", "ActiveRecord::Base.connection.create_table(:posts) {|t| t.string :title }"