fix(Assertions): use React

[layershifter]

Preamble

In initial test-run I've expirienced problems with normal functions. Plugins wants to transform non-react code:

if (!handledProps) {
  handledProps = []

  if (autoControlledProps) pushUnique(autoControlledProps, handledProps)
  if (defaultProps) pushUnique(Object.keys(defaultProps), handledProps)
  if (propTypes) pushUnique(Object.keys(propTypes), handledProps)

  Component.handledProps = handledProps
}

Solution

Add assertions that will check that we really transforming React component.

TODO:

• fix usage of buildCodeFrameError in assertions;
• add assertions for React stateless and statefull components;
• reduce visits.