Module: T::CompatibilityPatches::RSpecCompatibility::MemoizedHelpers

Defined in:
lib/types/compatibility_patches.rb

Instance Method Summary collapse

Instance Method Details

#let(name, &block) ⇒ Object

‘let!`, `subject`, and `subject!` are implemented by dispatching to `let`, so this should cover those methods too.



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# File 'lib/types/compatibility_patches.rb', line 62

def let(name, &block)
  # TODO(jez) This will need to use consume!

  current_declaration = T::Private::DeclState.current.active_declaration
  return super unless current_declaration
  T::Private::DeclState.current.reset!

  # Allow the `let`-defined methods to be defined
  super

  # Stash the sig and re-define the method RSpec just defined. This
  # ensures that the `sig` attaches to the outer method, not any
  # method inside the LetDefinitions module.
  #
  # Unfortunately, this means that the runtime checks are not
  # memoized (but they never were).
  #
  # (An alternative approach of pretending that the `sig` was actually
  # written inside the `LetDefinitions` module didn't work, because
  # things like `sig {override}` broke: the `LetDefinitions` module
  # has no ancestors and thus does not override anything)

  method = instance_method(name)
  remove_method(name)
  T::Private::DeclState.current.active_declaration = current_declaration
  define_method(name, method)
end