Skip main in tests for meaningful cover stats

.travis.yml

@@ -11,5 +11,5 @@ before_install:
 script:
   - go vet 
   - golint -set_exit_status
-  - go test -race -v
+  - go test -race -v -tags test -covermode=atomic -coverprofile=profile.cov
-  - $HOME/gopath/bin/goveralls -service=travis-ci
+  - $HOME/gopath/bin/goveralls -coverprofile=profile.cov -service=travis-ci

main.go

@@ -1,3 +1,5 @@
+//+build !test
+
 package main
 
 import (