Disables warning messages about expectations being set on nil.

By default warning messages are issued when expectations are set on nil. This is to prevent false-positives and to catch potential bugs early on.

Creates an instance of RSpec::Mocks::Mock.

`name` is used for failure reporting, so you should use the role that the mock is playing in the example.

Use `stubs` to declare one or more method stubs in one statement.

@example

  book = double("book", :title => "The RSpec Book")
  book.title #=> "The RSpec Book"

  card = double("card", :suit => "Spades", :rank => "A")
  card.suit  #=> "Spades"
  card.rank  #=> "A"

Just like double

Just like double