decodeAsXPendingSummary NPE on r.get(1) or r.get(2)

[roux-jerome]

The xpending command can return null for lowest, hightest and consumer

https://github.com/quarkusio/quarkus/blob/main/extensions/redis-client/runtime/src/main/java/io/quarkus/redis/runtime/datasource/ReactiveStreamCommandsImpl.java#L367-L381

[gsmet]

/cc @Ladicek @cescoffier

[quarkus-bot]

/cc @cescoffier (redis), @machi1990 (redis)

[Ladicek]

The Redis documentation (https://redis.io/docs/latest/commands/xpending/) doesn't mention this, but after creating an empty stream and a consumer group, this is indeed possible:

127.0.0.1:6379> XADD mystream * name Sara surname OConnor
"1737123500546-0"
# has length 1
127.0.0.1:6379> XLEN mystream
(integer) 1
127.0.0.1:6379> XTRIM mystream MAXLEN 0
(integer) 1
# is empty now
127.0.0.1:6379> XLEN mystream
(integer) 0

127.0.0.1:6379> XGROUP CREATE mystream group55 0-0
OK

# this shows the `nil` values in the XPENDING response
127.0.0.1:6379> XPENDING mystream group55
1) (integer) 0
2) (nil)
3) (nil)
4) (nil)