Add a 'keys' assertion
remove debug stuff
Finish the tests
Add expectation
Add refute test for keys assertion
internal is exposed
promises can resolve errors
correct default message
custom message without parameters work for internal asserts
context with fail works for internal asserts
make internal assertion reachable
Merge pull request #8 from reebalazs/master

'keys' assertion
raw testhelper
use all arguments in internal asserts
use internal assert
Removed unneeded code
explicit emit and throw failure
internal is renamed to raw
renamed internal assert test to raw asserts
Merge branch 'internal-assert'