add tests for casting
add tests for casting

cpcloud/numba,cpcloud/numba,stuartarchibald/numba,seibert/numba,cpcloud/numba,stuartarchibald/numba,IntelLabs/numba,numba/numba,stuartarchibald/numba,IntelLabs/numba,cpcloud/numba,cpcloud/numba,seibert/numba,numba/numba,IntelLabs/numba,seibert/numba,numba/numba,stuartarchibald/numba,numba/numba,IntelLabs/numba,stuartarchibald/numba,numba/numba,seibert/numba,IntelLabs/numba,seibert/numba