distribution/registry/storage/cache/redis_test.go

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package cache
import (
"flag"
"os"
"testing"
"time"
"github.com/garyburd/redigo/redis"
)
var redisAddr string
func init() {
flag.StringVar(&redisAddr, "test.registry.storage.cache.redis.addr", "", "configure the address of a test instance of redis")
}
// TestRedisLayerInfoCache exercises a live redis instance using the cache
// implementation.
func TestRedisLayerInfoCache(t *testing.T) {
if redisAddr == "" {
// fallback to an environement variable
redisAddr = os.Getenv("TEST_REGISTRY_STORAGE_CACHE_REDIS_ADDR")
}
if redisAddr == "" {
// skip if still not set
t.Skip("please set -registry.storage.cache.redis to test layer info cache against redis")
}
pool := &redis.Pool{
Dial: func() (redis.Conn, error) {
return redis.Dial("tcp", redisAddr)
},
MaxIdle: 1,
MaxActive: 2,
TestOnBorrow: func(c redis.Conn, t time.Time) error {
_, err := c.Do("PING")
return err
},
Wait: false, // if a connection is not avialable, proceed without cache.
}
// Clear the database
if _, err := pool.Get().Do("FLUSHDB"); err != nil {
t.Fatalf("unexpected error flushing redis db: %v", err)
}
checkLayerInfoCache(t, NewRedisLayerInfoCache(pool))
}