fix #1442

[killmenot]

Purpose (TL;DR) - mandatory

Fix issue #1442 by extending expectation with wrapped method props

Background (Problem in detail) - optional

See issue #1442

Solution

Extend expectation with wrapped method's props

How to verify - mandatory

1. Check out this branch
2. npm install
3. npm test

Checklist for author

• npm run lint passes
• References to standard library functions are cached.

[fatso83]

Thanks!

[mroderick]

Thanks!