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)
  res = T::Private::DeclState.current.without_on_method_added do
    # Allow the `let`-defined methods to be defined
    super
  end

  return res unless T::Private::DeclState.current.active_declaration

  # Force the `sig` to attach to the outer `let`-defined method,
  # not the one inside the `LetDefinitions` module. Re-running
  # `define_method` with the method we grab via reflection there
  # triggers the `method_added`, which allows the active_declaration
  # to be consumed.
  #
  # 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)
  define_method(name, method)

  res
end