Test Block

Test Block

Rarity tier	Epic
Renewable	No
Stackable	Yes (64)
Tool	None
Blast resistance	3,600,000
Hardness	-1
Luminous	No
Transparent	No
Flammable	No
Catches fire from lava	No
Map color	44 TERRACOTTA_LIGHT_GRAY
Note block instrument	Default (Harp)

{
    "title": "Test Block",
    "rows": [
        {
            "field": "<span style=\"white-space: nowrap;\"><span style=\"display: inline-block; background-color: #f5f; border: 1px solid #888; border-radius: 0.3em; color: transparent; width: 1em; height: 1em; vertical-align: -0.36em; margin-right: -0.1em\"><br></span> </span> Epic",
            "label": "(link to Rarity article, displayed as Rarity tier)"
        },
        {
            "field": "No",
            "label": "(link to Renewable resource article, displayed as Renewable)"
        },
        {
            "field": "Yes (64)",
            "label": "Stackable"
        },
        {
            "field": "None",
            "label": "Tool"
        },
        {
            "field": "3,600,000",
            "label": "(link to Explosion#Blast resistance article, displayed as Blast resistance)"
        },
        {
            "field": "-1",
            "label": "(link to Breaking#Blocks by hardness article, displayed as Hardness)"
        },
        {
            "field": "No",
            "label": "(link to Light article, displayed as Luminous)"
        },
        {
            "field": "No",
            "label": "(link to Opacity article, displayed as Transparent)"
        },
        {
            "field": "No",
            "label": "(link to Flammable article, displayed as Flammable)"
        },
        {
            "field": "No",
            "label": "Catches fire<br>from (link to lava article, displayed as lava)"
        },
        {
            "field": "<span style=\"white-space: nowrap;\"><span style=\"display: inline-block; background-color: rgb(135, 107, 98); border: 1px solid #888; border-radius: 0.3em; color: transparent; width: 1em; height: 1em; vertical-align: -0.36em; margin-right: -0.1em\"><br></span> 44 TERRACOTTA<wbr/>_LIGHT<wbr/>_GRAY</span>",
            "label": "(link to Map color article, displayed as Map color)"
        },
        {
            "field": "Default (Harp)",
            "label": "(link to Note Block#Instruments article, displayed as Note block instrument)"
        }
    ],
    "invimages": [
        "[&dTest Block]Test Block start",
        "[&dTest Block]Test Block log",
        "[&dTest Block]Test Block fail",
        "[&dTest Block]Test Block accept"
    ],
    "images": [
        "Test Block start.png",
        "Test Block log.png",
        "Test Block fail.png",
        "Test Block accept.png"
    ]
}

A test block is a technical block that is used for game tests.

Obtaining

Test blocks are available in the Creative inventory, under the Operator Utilities tab, and using the /setblock, /fill, or /give commands. When placed, test blocks are unbreakable in Survival and have the same blast resistance as bedrock.

Usage

Cannot be placed in Survival. When placed, use the test block to open its GUI. The GUI opens only if the player is in Creative mode, and has permission level 2 or higher.

Start

Emits a constant redstone signal, similarly to a block of redstone, when the test starts. This block is required to be part of the structure of a block-based test.

Log

Logs a message to the server log every time it receives a redstone signal. The message is set in the block's GUI. This has a speech bubble texture.

Fail

Causes a test to fail when it receives a redstone signal. This has a frowning face texture.

Accept

Causes a test to pass when it receives a redstone signal. This block is required to be part of the structure of a block-based test. This has a smiling face texture.

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Data values

ID

Java Edition:

Name	Identifier	Form	Translation key
Test Block	test_block	Block & Item	block.minecraft.test_block

Block states

Java Edition:

Name	Default value	Allowed values	Description
mode	start	start log fail accept	The state the test block is in.

History

Java Edition
1.21.5			25w03a				Added test blocks.
			25w04a				The name of block state has been changed from test_block_mode to mode.
			25w10a				The textures of test blocks have been changed.

Issues

Issues relating to "Test Block" are maintained on the bug tracker. Issues should be reported and viewed there.