drone学习笔记-集成测试mongodb

本以为很简单的一件事情搞了一天多的时间，郁闷啊。
目标：通过编写.drone.yml配置持续集成。最先测试的配置文件为：
.drone.yml

workspace:
  base: /go
  path: src/test/demo

pipeline:
  build:
    image: golang:latest
    commands:
      - go get
      - go build
      - go test

代码：

package main

import (
    "fmt"
)

func main() {
    fmt.Println("hello world!")
}

测试一切正常，如果就这么简单就不用往下写了。最终目标是实际生产中需要的带数据库的集成。然后就悲剧了：（
配置文件如下：
.drone.yml

workspace:
  base: /go
  path: src/test/demo

pipeline:
  build:
    image: golang:latest
    commands:
      - go get
      - go build
      - go test
services:
  database:
    image: mongo

main.go

package main

import (
    "fmt"
    "gopkg.in/mgo.v2"
    "gopkg.in/mgo.v2/bson"
)

type Person struct {
    Name  string
    Phone string
}

func main() {
    r, _ := conn_mgo()
    fmt.Println(r.Phone)
}

func conn_mgo() (*Person, error) {
    session, err := mgo.Dial("localhost:27017")
    if err != nil {
        panic(err)
    }
    defer session.Close()

    // Optional. Switch the session to a monotonic behavior.
    session.SetMode(mgo.Monotonic, true)

    c := session.DB("test").C("people")
    err = c.Insert(&Person{"Ale", "+55 53 8116 9639"},
        &Person{"Cla", "+55 53 8402 8510"})
    if err != nil {
        return nil, err
    }

    result := Person{}
    err = c.Find(bson.M{"name": "Ale"}).One(&result)
    if err != nil {
        return nil, err
    }

    // fmt.Println("Phone:", result.Phone)
    return &result, nil
}

main_test.go

package main

import (
    "testing"
)

func Test_connmgo(t *testing.T) {
    result, err := conn_mgo()

    if err != nil {
        t.Error(err)
    }

    t.Log(result.Phone)
}

编译失败。考虑几种可能

• 文档中描述的mongodb镜像未启动所以增加了 sleep选项

workspace:
  base: /go
  path: src/sunsl/demo
pipeline:
  build:
    image: golang:latest
    commands:
      - cat /etc/hosts
      - sleep 10 #休眠
      - go build
      - go test
services:
  database:
    image: mongo:latest
    commands: 
      - cat /etc/hosts

---失败！！

• 数据库连接错误

workspace:
  base: /go
  path: src/sunsl/demo

pipeline:
  build:
    image: golang:latest
    commands:
      - cat /etc/hosts
      - sleep 10
      - go build
      - go test
services:
  database:
    image: mongo:
    commands: 
      - cat /etc/hosts

意外发现在dababase下面增加name可以改变输出名称，呵呵，后面再说
.drone.yml

workspace:
  base: /go
  path: src/sunsl/demo

pipeline:
  build:
    image: golang:latest
    commands:
      - cat /etc/hosts
      - sleep 10
      - go build
      - go test
services:
  database:
    name: mongo #改变名称？
    image: mongo
    commands: 
      - cat /etc/hosts

--失败！看到输出信息中database是exit code 0 (服务直接退出了？database与build一样的IP,神马情况？）
好吧，继续阅读官方文档,在仔细阅读后发现如下说明：

Services are accessed using custom hostnames. In the above example the mysql service is assigned the hostname database and is available at database:3306.

原来如（比）啊，一夜的测试还不如仔细阅读文档，为了简单去掉build节省时间：
.drone.yml

workspace:
  base: /go
  path: src/sunsl/demo
pipeline:
  build:
    image: golang:latest
    commands:
      - go test
services:
  database:
    image: mongo:latest

service正常退出的原因是因为加了command输出信息
mgo连接字符串应该为

mgo.Dial("database:27017")

上面说的修改名称修改的mongo实际上修改的是服务名称，如果改为如下设置：

workspace:
  base: /go
  path: src/sunsl/demo

pipeline:
  build:
    image: golang:latest
    commands:
      - cat /etc/hosts
      - go test
services:
  db: #服务名称修改
    image: mongo:latest

这时连接字符串则需要修改为：

mgo.Dial("db:27017")

总算成功了，来张成功的图庆祝一下，然后睡觉！！！