* Use `permit` directly instead of manually building the matcher
* Some tests were being tested by calling #matches? directly when they
shouldn't have been, and some tests were duplicated
* Rename helper methods that define controllers to express intent better
* Don't make a global class (SimulatedError), keep the class local to
the example group
* Use lambdas for that use `raise_error`
Modify helper methods provided by ControllerBuilder so that we use as
much of rspec-rails's controller example group capabilities as possible.
All of this can still be improved but this is a good start for now.
* Change 'spec' Rake task to 'spec:unit'
* Require unit_spec_helper.rb in unit tests, not spec_helper.rb
* Re-namespace files in spec/support/unit under UnitTests
* Files in spec/support/unit/helpers no longer automatically add
themselves to RSpec - this happens in unit_spec_helper.rb
* Extract RecordWithDifferentErrorAttributeBuilder and
RecordValidatingConfirmationBuilder to separate files
* Move spec/shoulda to spec/unit_tests/shoulda
* Move spec/support/*.rb to spec/support/unit_tests/{helpers,matchers}
* Move spec_helper.rb to unit_spec_helper.rb
Kapil Sachdev