Add tests for exporting library methods.
Add tests for exporting library methods.

bitpay/bitcore,bitjson/bitcore,litecoin-project/litecore,bitpay/bitcore,iobond/bitcore,litecoin-project/litecore,bitjson/bitcore,UdjinM6/bitcore-dash,iobond/bitcore,iobond/bitcore,bitjson/bitcore,bitjson/bitcore,bitpay/bitcore,iobond/bitcore,martindale/bitcore,martindale/bitcore,martindale/bitcore,martindale/bitcore,iobond/bitcore,phplaboratory/bitcore,GroestlCoin/groestlcore,phplaboratory/bitcore,bitpay/bitcore