Removing dead code. attribute_cast_code isn't called.

Adds missing dependency to ActionView::TestCase::Behavior

* The module is needed for the `determine_constant_from_test_name`
  method.
* Without it, the including class is required to also include
  `ActiveSupport::Testing::ConstantLookup` or a `NoMethodError` will be
  raised upon instantiation of that class.
* Issue introduced in c0a24555

Allow wrapping a logger that hasn't set a formatter. Default to our SimpleFormatter. Otherwise we try extending nil with the tagging API.

Raise generic ParseError exception when ParamsParser fails parsing request params

This reverts commit 2233f145.

Add missing inflector dependency

Fix destructive side effects from marshaling an association caused by 65843e1a

Skip tests for non-supported isolation levels

i.e. Oracle database does not support these isolation levels.
`:read_uncommitted` `:repeatable_read`

This commit also works with other databases which do not support
these isolation levels.

Skip tests for non-supported isolation levels with Oracle

Feature: set the same width and height for image if size attribute is a number

http://guides.rubyonrails.org/security.html#regular-expressions

This will set image's both width and height attributes to
value passed in size option.

Improve support for minitest's spec DSL

remove unused Mime::Type#verify_request?

Improve how helper tests to resolve the helper class from the test name.
Add tests for helper tests using the minitest spec DSL.

update Security guide with StrongParameters documentation

Improve how mailer tests to resolve mailers from the test name.
Add tests for mailer tests using the minitest spec DSL.

Allow controller tests using the spec DSL to match strings.
Add test coverage for the register_spec_type calls.