golang单测覆盖率查询

#!/usr/bin/env bash

function ut_cover() {
  go test -coverprofile cover.out ./...
  total=$(go tool cover -func=cover.out | tail -1)
  echo ${total}
  rm cover.out
  coverage=$(echo ${total} | grep -P '\d+\.\d+(?=\%)' -o) #如果macOS 不支持grep -P选项，可以通过brew install grep更新grep
}

ut_cover

```