also:
 - makes test dependencies obvious
 - makes tests runnable from within subfolders

This reverts commit 3420a145, reversing
changes made to afb66a5a.

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

This reverts commit 28492204.

Reason: `suppress` without an argument doesn't actually tell what is
supressing. Also, it can be confused with ActiveRecord::Base#suppress.

* Add default exceptions affected by suppress

    suppress { do_something_that_might_fail }

    # instead of

    begin
      do_something_that_might_fail
    rescue
    end

    # or

    do_something_that_might_fail rescue nil

* Do not add default exceptions list constant

[Rafael Mendonça França + Alexey Zapparov]

bebugger doesn't work with Ruby 2.2 so we don't need to support it
anymore

`silence_stderr`, `silence_stream`, `capture` and `quietly`.

Calling Kernel#silence_stream creates a new file descriptor which isn't
closed after it is used. As a result calling silence_stream multiple
times leads to a build up of loose file descriptors and can cause issues
in environments where garbage collection isn't run often.

To facilitate the use of ActiveSupport::Testing::Performance outside
of a Rails application conditionally check for the presence of
Rails::VERSION::STRING before including it in the environment string.

Eliminate the warnings generated by redefining methods and constants.

Removed the AS core_ext/kernel/debugger breakpoint method as this method is added by ruby-debug and should be left as is. Missing tests added.

Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

moves Object#singleton_class to Kernel#singleton_class to match Ruby also there, same for #class_eval to simplify, and adds coverage for class_eval

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8563 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

 Check whether @flash is defined? for warnings-safety.
 r4488@asus:  jeremy | 2006-04-29 12:23:15 -0700
 Check whether @flash is defined? for warnings-safety. Obviates nil? check.
 r4489@asus:  jeremy | 2006-04-29 12:45:18 -0700
 Check whether @session is defined? for warnings-safety.
 r4490@asus:  jeremy | 2006-04-29 12:50:41 -0700
 Check whether @rendering_runtime is defined? for warnings-safety.
 r4491@asus:  jeremy | 2006-04-29 12:55:01 -0700
 Check whether @_cycles is defined? for warnings-safety.
 r4492@asus:  jeremy | 2006-04-29 12:59:19 -0700
 Check whether instance variables are defined? for warnings-safety.
 r4493@asus:  jeremy | 2006-04-29 13:14:09 -0700
 Add nil @template to PrototypeHelperTest to suppress unitialized instance variable warning.
 r4494@asus:  jeremy | 2006-04-29 13:31:34 -0700
 Check whether @auto_index defined? for warnings-safety.
 r4495@asus:  jeremy | 2006-04-29 13:32:24 -0700
 Wrap content_columns redefinitions with silence_warnings.
 r4496@asus:  jeremy | 2006-04-29 13:35:28 -0700
 Wrap more redefinitions with silence_warnings.
 r4829@asus:  jeremy | 2006-07-08 10:59:20 -0700
 abstract unit, fix warnings
 r4830@asus:  jeremy | 2006-07-08 11:06:12 -0700
 Use parens to silence warning.
 r4831@asus:  jeremy | 2006-07-08 11:06:48 -0700
 Use parens to silence warning.


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4595 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4386 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

 Introduce enable_warnings counterpart to silence_warnings.


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3134 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

 silence necessary warnings in logger test.  guard against multiple requires in kernel test.


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3131 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Added Kernel#silence_stderr to silence stderr for the duration of the given block.  Changed Kernel#` to print a message to stderr (like Unix) instead of raising Errno::ENOENT on Win32.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2899 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2180 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2179 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@624 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@393 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@310 5ecf4fe2-1ee6-0310-87b1-e25e094e27de