require 'spec/runner/formatter'
require 'spec/runner/behaviour_runner'
require 'spec/runner/options'
require 'spec/runner/option_parser'
require 'spec/runner/command_line'
require 'spec/runner/drb_command_line'
require 'spec/runner/backtrace_tweaker'
require 'spec/runner/reporter'
require 'spec/runner/extensions/object'
require 'spec/runner/extensions/kernel'
require 'spec/runner/spec_parser'

module Spec
  # == Behaviours and Examples
  # 
  # Rather than expressing examples in classes, RSpec uses a custom domain specific language to 
  # describe Behaviours and Examples of those behaviours.
  # 
  # A Behaviour is the equivalent of a fixture in xUnit-speak. It is a metaphor for the context
  # in which you will run your executable example - a set of known objects in a known starting state.
  # We begin be describing
  # 
  #   describe Account do
  # 
  #     before do
  #       @account = Account.new
  #     end
  # 
  #     it "should have a balance of $0" do
  #       @account.balance.should == Money.new(0, :dollars)
  #     end
  # 
  #   end
  # 
  # We use the before block to set up the Behaviour (given), and then the #it method to
  # hold the example code that expresses the event (when) and the expected outcome (then).
  # 
  # == Helper Methods
  # 
  # A primary goal of RSpec is to keep the examples clear. We therefore prefer
  # less indirection than you might see in xUnit examples and in well factored, DRY production code. We feel
  # that duplication is OK if removing it makes it harder to understand an example without
  # having to look elsewhere to understand its context.
  # 
  # That said, RSpec does support some level of encapsulating common code in helper
  # methods that can exist within a context or within an included module.
  # 
  # == Setup and Teardown
  # 
  # You can use before and after within a Behaviour. Both methods take an optional
  # scope argument so you can run the block before :each example or before :all examples
  # 
  #   describe "..." do
  #     before :all do
  #       ...
  #     end
  # 
  #     before :each do
  #       ...
  #     end
  # 
  #     it "should do something" do
  #       ...
  #     end
  # 
  #     it "should do something else" do
  #       ...
  #     end
  # 
  #     after :each do
  #       ...
  #     end
  # 
  #     after :all do
  #       ...
  #     end
  # 
  #   end
  # 
  # The <tt>before :each</tt> block will run before each of the examples, once for each example. Likewise,
  # the <tt>after :each</tt> block will run after each of the examples.
  # 
  # It is also possible to specify a <tt>before :all</tt> and <tt>after :all</tt>
  # block that will run only once for each behaviour, respectively before the first <code>before :each</code>
  # and after the last <code>after :each</code>. The use of these is generally discouraged, because it
  # introduces dependencies between the examples. Still, it might prove useful for very expensive operations
  # if you know what you are doing.
  # 
  # == Local helper methods
  # 
  # You can include local helper methods by simply expressing them within a context:
  # 
  #   describe "..." do
  #   
  #     it "..." do
  #       helper_method
  #     end
  # 
  #     def helper_method
  #       ...
  #     end
  # 
  #   end
  # 
  # == Included helper methods
  # 
  # You can include helper methods in multiple contexts by expressing them within
  # a module, and then including that module in your context:
  # 
  #   module AccountExampleHelperMethods
  #     def helper_method
  #       ...
  #     end
  #   end
  # 
  #   describe "A new account" do
  #     include AccountExampleHelperMethods
  #     before do
  #       @account = Account.new
  #     end
  # 
  #     it "should have a balance of $0" do
  #       helper_method
  #       @account.balance.should eql(Money.new(0, :dollars))
  #     end
  #   end
  # 
  # == Shared behaviour
  # 
  # You can define a shared behaviour, that may be used on other behaviours
  #
  #  describe "All Editions", :shared => true do
  #    it "all editions behaviour" ...
  #  end
  #
  #  describe SmallEdition do
  #    it_should_behave_like "All Editions"
  #  
  #    it "should do small edition stuff" do
  #      ...
  #    end
  #  end
  module Runner
    class << self
      def configuration # :nodoc:
        @configuration ||= Spec::DSL::Configuration.new
      end
      
      # Use this to configure various configurable aspects of
      # RSpec:
      #
      #   Spec::Runner.configure do |configuration|
      #     # Configure RSpec here
      #   end
      #
      # The yielded <tt>configuration</tt> object is a
      # Spec::DSL::Configuration instance. See its RDoc
      # for details about what you can do with it.
      #
      def configure
        yield configuration if @configuration.nil?
      end
    end
  end
end