By default, a single session is automatically created for you, but you can
use this method to open multiple sessions that ought to be tested
simultaneously.
# File actionpack/lib/action_controller/integration.rb, line 524
def open_session
session = Integration::Session.new
# delegate the fixture accessors back to the test instance
extras = Module.new { attr_accessor :delegate, :test_result }
self.class.fixture_table_names.each do |table_name|
name = table_name.tr(".", "_")
next unless respond_to?(name)
extras.send(:define_method, name) { |*args| delegate.send(name, *args) }
end
# delegate add_assertion to the test case
extras.send(:define_method, :add_assertion) { test_result.add_assertion }
session.extend(extras)
session.delegate = self
session.test_result = @_result
yield session if block_given?
session
end