Make sure you have go installed and your $GOPATH is properly set. Then run:
go get -u github.com/matthewmcnew/primes
go install github.com/matthewmcnew/primes
This will install an executable named primes to $GOPATH/bin
We used Ginkgo for our tests.
go get github.com/onsi/ginkgo/ginkgo
go get github.com/onsi/gomega
#add $GOPATH/bin to your path if necessary
ginkgo -r src/github.com/matthewmcnew/primes