This test were assuming that the list of render options will always be
the same. Fixing that so this doesn't break when we add/remove render
option in the future.

automatically call @foo.to_partial_path

Calling `render @foo` allows local variables but not options to be
passed to the partial renderer. The correct way to render an object AND
pass options to the partial renderer is to pass the object in the
`:partial` parameter. However, there were previously no tests for this
behaviour (in `render_helper_test.rb` at least).

Missing partial folder/_partial instead of folder/partial.

Closes #13002.

Same as 4d4ff531

Fix default rendered format problem when calling render method without :content_type option. Closes #11393.

Now if somebody by mistake will remove malformed files test will raise error.

+use_full_path+ option was removed in 3b3790a4 and passing the template
handler to render was deprecated in 43d27e91.

Introduced in 2c22376f

Previously rendering a partial without giving :object or :collection
would generate a local variable with the partial name by default.

This was noticed due to warnings in Ruby 2.0 of not used variables,
which turned out to be the generation of not used variables inside
partials that do not contain objects related to them.

This handler simply allows arbitrary Ruby code as a template

Fixes #2394

Allow access to current object_counter variable from layout when rendering with partial + collection

Closes #5025 part 2

Closes #5025

Reset memoized hash keys when new ActionView::Template handler is registered
Conflicts:

	actionpack/lib/action_view/template/handlers.rb

Fix deprecation warnings in action pack test suite due to passing template formats in the template name.

Allow both sym and array for details options in #render. using LC#registered_details to extract options.

For example, calling hello.erb is now deprecated. Since Rails 3.0
passing the handler had no effect whatsover. This commit simply
deprecates such cases so we can clean up the code in later releases.