test-go

reference

https://github.com/polaris1119/The-Golang-Standard-Library-by-Example/blob/master/chapter09/09.1.md

cover

1. terminal: go test -cover
2. html

        go test -coverprofile=cover
        go tool cover -html=cover

test file or func

1. test single file go test ./base/utils_test.go
2. test single func go test ./base/utils_test.go -run AddOne