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redis_test.go
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redis_test.go
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package ldredis
import (
"fmt"
"strconv"
"strings"
"testing"
r "github.com/gomodule/redigo/redis"
"github.com/stretchr/testify/assert"
"github.com/launchdarkly/go-sdk-common/v3/ldvalue"
"github.com/launchdarkly/go-server-sdk/v7/subsystems"
"github.com/launchdarkly/go-server-sdk/v7/testhelpers/storetest"
)
const redisURL = "redis://localhost:6379"
func TestRedisDataStore(t *testing.T) {
storetest.NewPersistentDataStoreTestSuite(makeTestStore, clearTestData).
ErrorStoreFactory(makeFailedStore(), verifyFailedStoreError).
ConcurrentModificationHook(setConcurrentModificationHook).
Run(t)
}
func makeTestStore(prefix string) subsystems.ComponentConfigurer[subsystems.PersistentDataStore] {
return DataStore().Prefix(prefix)
}
func makeFailedStore() subsystems.ComponentConfigurer[subsystems.PersistentDataStore] {
// Here we ensure that all Redis operations will fail by using an invalid hostname.
return DataStore().URL("redis://not-a-real-host")
}
func verifyFailedStoreError(t assert.TestingT, err error) {
assert.Contains(t, err.Error(), "no such host")
}
func clearTestData(prefix string) error {
if prefix == "" {
prefix = DefaultPrefix
}
client, err := r.DialURL(redisURL)
if err != nil {
return err
}
defer client.Close()
cursor := 0
for {
resp, err := client.Do("SCAN", fmt.Sprintf("%d", cursor), "MATCH", prefix+":*")
if err != nil {
return err
}
respValue, err := parseRedisResponseAsValue(resp)
badResponse := func() error {
return fmt.Errorf("unexpected format of Redis response: %s", respValue)
}
if err != nil {
return err
}
if respValue.Count() != 2 {
return badResponse()
}
cursor, err = strconv.Atoi(respValue.GetByIndex(0).StringValue())
if err != nil {
return badResponse()
}
respLines := respValue.GetByIndex(1)
if respLines.Type() != ldvalue.ArrayType {
return badResponse()
}
var failure error
for i := 0; i < respLines.Count(); i++ {
value := respLines.GetByIndex(i)
redisKey := strings.TrimPrefix(strings.TrimSuffix(value.String(), `"`), `"`)
failure = client.Send("DEL", redisKey)
if failure != nil {
break
}
}
if failure != nil {
return failure
}
if cursor == 0 { // SCAN returns 0 when the current result subset is the last one
break
}
}
return client.Flush()
}
func setConcurrentModificationHook(store subsystems.PersistentDataStore, hook func()) {
store.(*redisDataStoreImpl).testTxHook = hook
}
func parseRedisResponseAsValue(resp interface{}) (ldvalue.Value, error) {
switch t := resp.(type) {
case []interface{}:
a := ldvalue.ArrayBuild()
for _, item := range t {
v, err := parseRedisResponseAsValue(item)
if err != nil {
return ldvalue.Null(), err
}
a.Add(v)
}
return a.Build(), nil
case []byte:
return ldvalue.String(string(t)), nil
default:
return ldvalue.Null(), fmt.Errorf("unexpected data type in response: %T", resp)
}
}