Set Test Block

Play 0x3C, client → server.

play · 0x3C · serverbound (client → server)

Sent when the player saves a test block GUI (game test framework). position is the block, mode is start, log, fail, or accept, and message is the text shown for log/fail. Operator-only; the server updates the block entity.

Sent by the client, read by the server. Listen for it with client.on("SetTestBlock", (data) => …) on the receiving side.

Fields

Field	Type	Notes
`position`	Position
`mode`	VarInt
`message`	String

Send it

await client.sendPacket("SetTestBlock", {
  position: /* Position */,
  mode: /* VarInt */,
  message: /* String */,
});

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: src/Core/Versions/776/Packets/play/serverbound/SetTestBlock.ts