Tester Mod

A Minecraft NeoForge 1.21.1 mod that provides a configurable damage testing entity.

Features

Tester Entity

• High Health: 1000 HP, sufficient for extensive damage testing
• Damage Tracking: Real-time damage output including raw damage and actual damage (after invulnerability reduction)
• Invulnerability: Tester won't take real damage but simulates damage invulnerability logic
• Multi-Tester Identification: Damage output includes tester name prefix for distinguishing multiple testers
• Fire Resistance: Ignores fire-type damage if the tester has Fire Resistance effect

Tester Setter Item

Obtain from the Tools creative tab, or use command /give @s tester_mod:tester_setter

Usage

Action	Effect
Right-click on block	Spawn a tester entity at the clicked position
Right-click on tester	Toggle knockback state (enabled/disabled)
Shift + Right-click on tester	Toggle zero-damage output visibility

Damage Output Format

[Tester Name] Damage: actual_damage/raw_damage, Type: damage_type, Tick: game_tick

Commands

Command	Description
/remove_tester	Remove all testers created by yourself
/remove_tester all	Remove all testers in the world

Technical Details

Entity Attributes

• Movement Speed: 0 (stationary)
• Knockback Resistance: 0 (configurable)
• Invulnerability Duration: 10 ticks (~0.5 seconds)

Damage Invulnerability Logic

When the tester receives damage during invulnerability:

• If new damage ≤ last damage → actual damage = 0
• If new damage > last damage → actual damage = new damage - last damage

Installation

1. Clone this repository
2. Open the project in IntelliJ IDEA or Eclipse
3. Run gradlew --refresh-dependencies to refresh dependencies
4. Run gradlew runClient to start the client for testing

Building

gradlew build

Built artifacts are located in build/libs/.

Resources

• Project uses NeoForge MDK template
• Mapping names use official Mojang mappings

Additional Resources

• NeoForged Documentation: https://docs.neoforged.net/
• NeoForged Discord: https://discord.neoforged.net/