/
mongodbhelper.go
145 lines (128 loc) · 3.47 KB
/
mongodbhelper.go
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package mongodb
import (
"crypto/tls"
"errors"
"fmt"
"net"
"net/url"
"os"
"strconv"
"strings"
"testing"
"time"
"github.com/ory/dockertest"
"gopkg.in/mgo.v2"
)
// PrepareTestContainer calls PrepareTestContainerWithDatabase without a
// database name value, which results in configuring a database named "test"
func PrepareTestContainer(t *testing.T, version string) (cleanup func(), retURL string) {
return PrepareTestContainerWithDatabase(t, version, "")
}
// PrepareTestContainerWithDatabase configures a test container with a given
// database name, to test non-test/admin database configurations
func PrepareTestContainerWithDatabase(t *testing.T, version, dbName string) (cleanup func(), retURL string) {
if os.Getenv("MONGODB_URL") != "" {
return func() {}, os.Getenv("MONGODB_URL")
}
pool, err := dockertest.NewPool("")
if err != nil {
t.Fatalf("Failed to connect to docker: %s", err)
}
resource, err := pool.Run("mongo", version, []string{})
if err != nil {
t.Fatalf("Could not start local mongo docker container: %s", err)
}
cleanup = func() {
err := pool.Purge(resource)
if err != nil {
t.Fatalf("Failed to cleanup local container: %s", err)
}
}
retURL = fmt.Sprintf("mongodb://localhost:%s", resource.GetPort("27017/tcp"))
if dbName != "" {
retURL = fmt.Sprintf("%s/%s", retURL, dbName)
}
// exponential backoff-retry
if err = pool.Retry(func() error {
var err error
dialInfo, err := ParseMongoURL(retURL)
if err != nil {
return err
}
session, err := mgo.DialWithInfo(dialInfo)
if err != nil {
return err
}
defer session.Close()
session.SetSyncTimeout(1 * time.Minute)
session.SetSocketTimeout(1 * time.Minute)
return session.Ping()
}); err != nil {
cleanup()
t.Fatalf("Could not connect to mongo docker container: %s", err)
}
return
}
// ParseMongoURL will parse a connection string and return a configured dialer
func ParseMongoURL(rawURL string) (*mgo.DialInfo, error) {
url, err := url.Parse(rawURL)
if err != nil {
return nil, err
}
info := mgo.DialInfo{
Addrs: strings.Split(url.Host, ","),
Database: strings.TrimPrefix(url.Path, "/"),
Timeout: 10 * time.Second,
}
if url.User != nil {
info.Username = url.User.Username()
info.Password, _ = url.User.Password()
}
query := url.Query()
for key, values := range query {
var value string
if len(values) > 0 {
value = values[0]
}
switch key {
case "authSource":
info.Source = value
case "authMechanism":
info.Mechanism = value
case "gssapiServiceName":
info.Service = value
case "replicaSet":
info.ReplicaSetName = value
case "maxPoolSize":
poolLimit, err := strconv.Atoi(value)
if err != nil {
return nil, errors.New("bad value for maxPoolSize: " + value)
}
info.PoolLimit = poolLimit
case "ssl":
// Unfortunately, mgo doesn't support the ssl parameter in its MongoDB URI parsing logic, so we have to handle that
// ourselves. See https://github.com/go-mgo/mgo/issues/84
ssl, err := strconv.ParseBool(value)
if err != nil {
return nil, errors.New("bad value for ssl: " + value)
}
if ssl {
info.DialServer = func(addr *mgo.ServerAddr) (net.Conn, error) {
return tls.Dial("tcp", addr.String(), &tls.Config{})
}
}
case "connect":
if value == "direct" {
info.Direct = true
break
}
if value == "replicaSet" {
break
}
fallthrough
default:
return nil, errors.New("unsupported connection URL option: " + key + "=" + value)
}
}
return &info, nil
}