Added new config options for RSpec.

.rspec

@@ -0,0 +1,2 @@
+--color
+--require spec_helper

spec/spec_helper.rb

@@ -36,9 +36,60 @@
 Dir['./spec/support/**/*.rb'].sort.each { |f| require f }
 
 RSpec.configure do |config|
+  # These two settings work together to allow you to limit a spec run
+  # to individual examples or groups you care about by tagging them with
+  # `:focus` metadata. When nothing is tagged with `:focus`, all examples
+  # get run.
+  config.filter_run :focus
+  config.run_all_when_everything_filtered = true
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = 'doc'
+  end
+
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+
   # Run specs in random order to surface order dependencies. If you find an
   # order dependency and want to debug it, you can fix the order by providing
   # the seed, which is printed after each run.
   #     --seed 1234
-  config.order = "random"
+  config.order = :random
+
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # Enable only the newer, non-monkey-patching expect syntax.
+    # For more details, see:
+    #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax
+    expectations.syntax = :expect
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Enable only the newer, non-monkey-patching expect syntax.
+    # For more details, see:
+    #   - http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+    mocks.syntax = :expect
+
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended.
+    # mocks.verify_partial_doubles = true
+  end
 end