Closes #9459.

The PR #6597 unified the configuration for `include_root_in_json`
in AM and AR to `false`.
Later on with the refactoring commit: e030f26a the value in AR was
set to `true` but I think this was not on purpose.

With this commit both AM and AR will have the same configuration
for `include_root_in_json`, which is `false`.

another value has been specified).

Previously we would just silently write the attribute. This can lead to
subtle bugs (for example, see the change in AutosaveAssociation where a
through association would wrongly gain an attribute.

Also, ensuring that we never gain any new attributes after
initialization will allow me to reduce our dependence on method_missing.

One duplicate was eliminated: test_to_xml_including_methods/
test_methods_are_called_on_object.

Refactor Active Record test connection setup. Please see the RUNNING_UNIT_TESTS file for details, but essentially you can now configure things in test/config.yml. You can also run tests directly via the command line, e.g. ruby path/to/test.rb (no rake needed, uses default db connection from test/config.yml). This will help us fix the CI by enabling us to isolate the different Rails versions to different databases.

to relevant files.

Number of assertions before refactoring:
2391 tests, 7579 assertions, 0 failures, 0 errors

Number of assertions after refactoring:
2391 tests, 7579 assertions, 0 failures, 0 errors
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8681 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8661 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8660 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

* TestCase: introduce declared setup and teardown callbacks. Pass a list of methods and an optional block to call before setup or after teardown. Setup callbacks are run in the order declared; teardown callbacks are run in reverse.  [Jeremy Kemper]


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8570 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Change JSON to encode %w(< > &) as 4 digit hex codes to be in compliance with the JSON spec.  Closes #9975 [josh, chuyeow, tpope]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8050 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Added ActiveRecord::Base#to_json/from_json (currently does not support :include like to_xml) [DHH]. Added ActiveRecord::Base#from_xml [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7519 5ecf4fe2-1ee6-0310-87b1-e25e094e27de