SPIGOT-1936: LootTable API

nms-patches/EntityInsentient.patch

@@ -19,7 +19,7 @@
  public abstract class EntityInsentient extends EntityLiving {
  
      private static final DataWatcherObject<Byte> a = DataWatcher.a(EntityInsentient.class, DataWatcherRegistry.a);
-@@ -27,7 +39,7 @@
+@@ -27,11 +39,11 @@
      public float[] dropChanceHand;
      private final NonNullList<ItemStack> bE;
      public float[] dropChanceArmor;
@@ -27,7 +27,13 @@
 +    // public boolean canPickUpLoot; // CraftBukkit - moved up to EntityLiving
      public boolean persistent;
      private final Map<PathType, Float> bH;
-     private MinecraftKey bI;
+-    private MinecraftKey bI;
+-    private long bJ;
++    public MinecraftKey bI; // CraftBukkit private -> public
++    public long bJ; // CraftBukkit private -> public
+     private boolean bK;
+     private Entity leashHolder;
+     private NBTTagCompound bM;
 @@ -57,6 +69,9 @@
              this.n();
          }
@@ -100,7 +106,19 @@
          NBTTagList nbttaglist;
          int i;
  
-@@ -470,11 +525,21 @@
+@@ -394,6 +449,11 @@
+     protected MinecraftKey G() {
+         return null;
+     }
++    // CraftBukkit - start
++    public MinecraftKey getLootTable() {
++        return G();
++    }
++    // CraftBukkit - end
+ 
+     protected void a(boolean flag, int i, DamageSource damagesource) {
+         MinecraftKey minecraftkey = this.bI;
+@@ -470,11 +530,21 @@
          ItemStack itemstack1 = this.getEquipment(enumitemslot);
          boolean flag = this.a(itemstack, itemstack1, enumitemslot);
  
@@ -123,7 +141,7 @@
              }
  
              this.setSlot(enumitemslot, itemstack);
-@@ -554,11 +619,11 @@
+@@ -554,11 +624,11 @@
                  double d2 = entityhuman.locZ - this.locZ;
                  double d3 = d0 * d0 + d1 * d1 + d2 * d2;
  
@@ -137,7 +155,7 @@
                      this.die();
                  } else if (d3 < 1024.0D) {
                      this.ticksFarFromPlayer = 0;
-@@ -946,12 +1011,24 @@
+@@ -946,12 +1016,24 @@
  
      public final boolean b(EntityHuman entityhuman, EnumHand enumhand) {
          if (this.isLeashed() && this.getLeashHolder() == entityhuman) {
@@ -162,7 +180,7 @@
                  this.setLeashHolder(entityhuman, true);
                  itemstack.subtract(1);
                  return true;
-@@ -972,10 +1049,12 @@
+@@ -972,10 +1054,12 @@
  
          if (this.bK) {
              if (!this.isAlive()) {
@@ -175,7 +193,7 @@
                  this.unleash(true, true);
              }
          }
-@@ -986,7 +1065,9 @@
+@@ -986,7 +1070,9 @@
              this.bK = false;
              this.leashHolder = null;
              if (!this.world.isClientSide && flag1) {
@@ -185,7 +203,7 @@
              }
  
              if (!this.world.isClientSide && flag && this.world instanceof WorldServer) {
-@@ -1056,6 +1137,7 @@
+@@ -1056,6 +1142,7 @@
  
                  this.setLeashHolder(entityleash, true);
              } else {
@@ -193,7 +211,7 @@
                  this.unleash(false, true);
              }
          }
-@@ -1151,7 +1233,14 @@
+@@ -1151,7 +1238,14 @@
              int j = EnchantmentManager.getFireAspectEnchantmentLevel(this);
  
              if (j > 0) {

nms-patches/EntityMinecartContainer.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/server/EntityMinecartContainer.java
 +++ b/net/minecraft/server/EntityMinecartContainer.java
-@@ -3,6 +3,13 @@
+@@ -3,23 +3,66 @@
  import java.util.Iterator;
  import java.util.Random;
  import javax.annotation.Nullable;
@@ -14,10 +14,12 @@
  
  public abstract class EntityMinecartContainer extends EntityMinecartAbstract implements ITileInventory, ILootable {
  
-@@ -11,15 +18,51 @@
+     private NonNullList<ItemStack> items;
+     private boolean b;
      private MinecraftKey c;
-     private long d;
- 
+-    private long d;
++    public long d; // CraftBukkit private -> public
++
 +    // CraftBukkit start
 +    public List<HumanEntity> transaction = new java.util.ArrayList<HumanEntity>();
 +    private int maxStack = MAX_STACK;
@@ -53,7 +55,7 @@
 +        return getBukkitEntity().getLocation();
 +    }
 +    // CraftBukkit end
-+
+ 
      protected EntityMinecartContainer(EntityTypes<?> entitytypes, World world) {
          super(entitytypes, world);
 -        this.items = NonNullList.a(36, ItemStack.a);

nms-patches/LootEnchantFunction.patch

@@ -0,0 +1,26 @@
+--- a/net/minecraft/server/LootEnchantFunction.java
++++ b/net/minecraft/server/LootEnchantFunction.java
+@@ -21,8 +21,13 @@
+ 
+         if (entity instanceof EntityLiving) {
+             int i = EnchantmentManager.g((EntityLiving) entity);
++            // CraftBukkit start - use lootingModifier if set by plugin
++            if (loottableinfo.lootingMod > org.bukkit.loot.LootContext.DEFAULT_LOOT_MODIFIER) {
++                i = loottableinfo.lootingMod;
++            }
++            // CraftBukkit end
+ 
+-            if (i == 0) {
++            if (i <= 0) { // CraftBukkit - account for possible negative looting values from Bukkit
+                 return itemstack;
+             }
+ 
+@@ -57,7 +62,7 @@
+             return new LootEnchantFunction(alootitemcondition, (LootValueBounds) ChatDeserializer.a(jsonobject, "count", jsondeserializationcontext, LootValueBounds.class), i);
+         }
+ 
+-        public LootItemFunction b(JsonObject jsonobject, JsonDeserializationContext jsondeserializationcontext, LootItemCondition[] alootitemcondition) {
++        public LootEnchantFunction b(JsonObject jsonobject, JsonDeserializationContext jsondeserializationcontext, LootItemCondition[] alootitemcondition) { // CraftBukkit - decompile error
+             return this.a(jsonobject, jsondeserializationcontext, alootitemcondition);
+         }
+     }

nms-patches/LootItemConditionRandomChanceWithLooting.patch

@@ -0,0 +1,23 @@
+--- a/net/minecraft/server/LootItemConditionRandomChanceWithLooting.java
++++ b/net/minecraft/server/LootItemConditionRandomChanceWithLooting.java
+@@ -21,6 +21,11 @@
+         if (loottableinfo.c() instanceof EntityLiving) {
+             i = EnchantmentManager.g((EntityLiving) loottableinfo.c());
+         }
++        // CraftBukkit start - only use lootingModifier if set by Bukkit
++        if (loottableinfo.lootingMod > org.bukkit.loot.LootContext.DEFAULT_LOOT_MODIFIER) {
++            i = loottableinfo.lootingMod;
++        }
++        // CraftBukkit end
+ 
+         return random.nextFloat() < this.a + (float) i * this.b;
+     }
+@@ -40,7 +45,7 @@
+             return new LootItemConditionRandomChanceWithLooting(ChatDeserializer.l(jsonobject, "chance"), ChatDeserializer.l(jsonobject, "looting_multiplier"));
+         }
+ 
+-        public LootItemCondition b(JsonObject jsonobject, JsonDeserializationContext jsondeserializationcontext) {
++        public LootItemConditionRandomChanceWithLooting b(JsonObject jsonobject, JsonDeserializationContext jsondeserializationcontext) { // CraftBukkit - decompile error
+             return this.a(jsonobject, jsondeserializationcontext);
+         }
+     }

nms-patches/LootTableInfo.patch

@@ -0,0 +1,67 @@
+--- a/net/minecraft/server/LootTableInfo.java
++++ b/net/minecraft/server/LootTableInfo.java
+@@ -11,6 +11,7 @@
+ public class LootTableInfo {
+ 
+     private final float a;
++    public final int lootingMod; // CraftBukkit - add field
+     private final WorldServer b;
+     private final LootTableRegistry c;
+     @Nullable
+@@ -23,7 +24,8 @@
+     private final BlockPosition g;
+     private final Set<LootTable> h = Sets.newLinkedHashSet();
+ 
+-    public LootTableInfo(float f, WorldServer worldserver, LootTableRegistry loottableregistry, @Nullable Entity entity, @Nullable EntityHuman entityhuman, @Nullable DamageSource damagesource, @Nullable BlockPosition blockposition) {
++    // CraftBukkit - add looting modifier to constructor
++    public LootTableInfo(float f, WorldServer worldserver, LootTableRegistry loottableregistry, @Nullable Entity entity, @Nullable EntityHuman entityhuman, @Nullable DamageSource damagesource, @Nullable BlockPosition blockposition, int lootingModifier) {
+         this.a = f;
+         this.b = worldserver;
+         this.c = loottableregistry;
+@@ -31,6 +33,7 @@
+         this.e = entityhuman;
+         this.f = damagesource;
+         this.g = blockposition;
++        this.lootingMod = lootingModifier; // CraftBukkit
+     }
+ 
+     @Nullable
+@@ -127,11 +130,11 @@
+                 return LootTableInfo.EntityTarget.a(jsonreader.nextString());
+             }
+ 
+-            public Object read(JsonReader jsonreader) throws IOException {
++            public LootTableInfo.EntityTarget read(JsonReader jsonreader) throws IOException { // CraftBukkit - decompile error
+                 return this.a(jsonreader);
+             }
+ 
+-            public void write(JsonWriter jsonwriter, Object object) throws IOException {
++            public void write(JsonWriter jsonwriter, LootTableInfo.EntityTarget object) throws IOException { // CraftBukkit - decompile error
+                 this.a(jsonwriter, (LootTableInfo.EntityTarget) object);
+             }
+         }
+@@ -141,6 +144,7 @@
+ 
+         private final WorldServer a;
+         private float b;
++        private int lootingMod; // CraftBukkit
+         private Entity c;
+         private EntityHuman d;
+         private DamageSource e;
+@@ -175,8 +179,15 @@
+             return this;
+         }
+ 
++        // CraftBukkit start - add looting modifier
++        public LootTableInfo.a lootingModifier(int modifier) {
++            this.lootingMod = modifier;
++            return this;
++        }
++        // CraftBukkit end
++
+         public LootTableInfo a() {
+-            return new LootTableInfo(this.b, this.a, this.a.getMinecraftServer().aP(), this.c, this.d, this.e, this.f);
++            return new LootTableInfo(this.b, this.a, this.a.getMinecraftServer().aP(), this.c, this.d, this.e, this.f, this.lootingMod); // CraftBukkit add looting modifier
+         }
+     }
+ }

src/main/java/org/bukkit/craftbukkit/CraftLootTable.java

@@ -0,0 +1,109 @@
+package org.bukkit.craftbukkit;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Random;
+import net.minecraft.server.BlockPosition;
+import net.minecraft.server.DamageSource;
+import net.minecraft.server.Entity;
+import net.minecraft.server.EntityHuman;
+import net.minecraft.server.IInventory;
+import net.minecraft.server.LootTable;
+import net.minecraft.server.LootTableInfo;
+import net.minecraft.server.WorldServer;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.entity.CraftEntity;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.craftbukkit.inventory.CraftInventory;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.loot.LootContext;
+
+public class CraftLootTable implements org.bukkit.loot.LootTable {
+
+    private final LootTable handle;
+    private final NamespacedKey key;
+
+    public CraftLootTable(NamespacedKey key, LootTable handle) {
+        this.handle = handle;
+        this.key = key;
+    }
+
+    public LootTable getHandle() {
+        return handle;
+    }
+
+    @Override
+    public Collection<ItemStack> populateLoot(Random random, LootContext context) {
+        LootTableInfo nmsContext = convertContext(context);
+        List<net.minecraft.server.ItemStack> nmsItems = handle.a(random, nmsContext); // PAIL rename populateLoot
+        Collection<ItemStack> bukkit = new ArrayList<>(nmsItems.size());
+
+        for (net.minecraft.server.ItemStack item : nmsItems) {
+            if (item.isEmpty()) {
+                continue;
+            }
+            bukkit.add(CraftItemStack.asBukkitCopy(item));
+        }
+
+        return bukkit;
+    }
+
+    @Override
+    public void fillInventory(Inventory inventory, Random random, LootContext context) {
+        LootTableInfo nmsContext = convertContext(context);
+        CraftInventory craftInventory = (CraftInventory) inventory;
+        IInventory handle = craftInventory.getInventory();
+
+        // TODO: When events are added, call event here w/ custom reason?
+        getHandle().a(handle, random, nmsContext); // PAIL rename fillInventory
+    }
+
+    @Override
+    public NamespacedKey getKey() {
+        return key;
+    }
+
+    private LootTableInfo convertContext(LootContext context) {
+        Location loc = context.getLocation();
+        WorldServer handle = ((CraftWorld) loc.getWorld()).getHandle();
+
+        LootTableInfo.a builder = new LootTableInfo.a(handle); // PAIL rename Builder
+        builder.a(context.getLuck()); // PAIL rename withLuck, luck
+
+        if (context.getLootedEntity() != null) {
+            Entity nmsLootedEntity = ((CraftEntity) context.getLootedEntity()).getHandle();
+            builder.a(nmsLootedEntity); // PAIL Rename withLootedEntity, lootedEntity
+            builder.a(DamageSource.GENERIC); // PAIL rename withDamageSource, damageSource
+            builder.a(new BlockPosition(nmsLootedEntity)); // PAIL rename withPosition, position
+        }
+
+        if (context.getKiller() != null) {
+            EntityHuman nmsKiller = ((CraftHumanEntity) context.getKiller()).getHandle();
+            builder.a(nmsKiller); // PAIL rename withKiller, killer
+            // If there is a player killer, damage source should reflect that in case loot tables use that information
+            builder.a(DamageSource.playerAttack(nmsKiller)); // PAIL rename withDamageSource, damageSource
+        }
+
+        return builder.a(); // PAIL rename build
+    }
+
+    @Override
+    public String toString() {
+        return getKey().toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof org.bukkit.loot.LootTable)) {
+            return false;
+        }
+
+        org.bukkit.loot.LootTable table = (org.bukkit.loot.LootTable) obj;
+        return table.getKey().equals(this.getKey());
+    }
+}

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -95,6 +95,7 @@ import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.Recipe;
 import org.bukkit.inventory.ShapedRecipe;
 import org.bukkit.inventory.ShapelessRecipe;
+import org.bukkit.loot.LootTable;
 import org.bukkit.permissions.Permissible;
 import org.bukkit.permissions.Permission;
 import org.bukkit.plugin.Plugin;
@@ -1765,6 +1766,13 @@ public final class CraftServer implements Server {
         }
     }
 
+    public LootTable getLootTable(NamespacedKey key) {
+        Validate.notNull(key, "NamespacedKey cannot be null");
+
+        LootTableRegistry registry = getServer().aP(); // PAIL getLootTableRegistry
+        return new CraftLootTable(key, registry.a(CraftNamespacedKey.toMinecraft(key))); // PAIL rename getLootTable
+    }
+
     @Deprecated
     @Override
     public UnsafeValues getUnsafe() {

src/main/java/org/bukkit/craftbukkit/block/CraftLootable.java

@@ -1,12 +1,17 @@
 package org.bukkit.craftbukkit.block;
 
+import net.minecraft.server.MinecraftKey;
 import net.minecraft.server.TileEntityLootable;
+import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.Nameable;
 import org.bukkit.block.Block;
 import org.bukkit.craftbukkit.util.CraftChatMessage;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
+import org.bukkit.loot.LootTable;
+import org.bukkit.loot.Lootable;
 
-public abstract class CraftLootable<T extends TileEntityLootable> extends CraftContainer<T> implements Nameable {
+public abstract class CraftLootable<T extends TileEntityLootable> extends CraftContainer<T> implements Nameable, Lootable {
 
     public CraftLootable(Block block, Class<T> tileEntityClass) {
         super(block, tileEntityClass);
@@ -34,5 +39,38 @@ public abstract class CraftLootable<T extends TileEntityLootable> extends CraftC
         if (!this.getSnapshot().hasCustomName()) {
             lootable.setCustomName(null);
         }
+        if (this.getSnapshot().Q_() == null) {
+            lootable.a((MinecraftKey) null, 0L); // PAIL rename setLootTable
+        }
+    }
+
+    @Override
+    public LootTable getLootTable() {
+        if (getSnapshot().Q_() == null) {
+            return null;
+        }
+
+        MinecraftKey key = getSnapshot().Q_();
+        return Bukkit.getLootTable(CraftNamespacedKey.fromMinecraft(key));
+    }
+
+    @Override
+    public void setLootTable(LootTable table) {
+        setLootTable(table, getSeed());
+    }
+
+    @Override
+    public long getSeed() {
+        return getSnapshotNBT().getLong("LootTableSeed"); // returns OL if an error occurred
+    }
+
+    @Override
+    public void setSeed(long seed) {
+        setLootTable(getLootTable(), seed);
+    }
+
+    private void setLootTable(LootTable table, long seed) {
+        MinecraftKey key = (table == null) ? null : CraftNamespacedKey.toMinecraft(table.getKey());
+        getSnapshot().a(key, seed); // PAIL setLootTable
     }
 }

src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartChest.java

@@ -9,7 +9,7 @@ import org.bukkit.entity.minecart.StorageMinecart;
 import org.bukkit.inventory.Inventory;
 
 @SuppressWarnings("deprecation")
-public class CraftMinecartChest extends CraftMinecart implements StorageMinecart {
+public class CraftMinecartChest extends CraftMinecartContainer implements StorageMinecart {
     private final CraftInventory inventory;
 
     public CraftMinecartChest(CraftServer server, EntityMinecartChest entity) {

src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartContainer.java

@@ -0,0 +1,54 @@
+package org.bukkit.craftbukkit.entity;
+
+import net.minecraft.server.EntityMinecartAbstract;
+import net.minecraft.server.EntityMinecartContainer;
+import net.minecraft.server.MinecraftKey;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
+import org.bukkit.loot.LootTable;
+import org.bukkit.loot.Lootable;
+
+public abstract class CraftMinecartContainer extends CraftMinecart implements Lootable {
+
+    public CraftMinecartContainer(CraftServer server, EntityMinecartAbstract entity) {
+        super(server, entity);
+    }
+
+    @Override
+    public EntityMinecartContainer getHandle() {
+        return (EntityMinecartContainer) entity;
+    }
+
+    @Override
+    public void setLootTable(LootTable table) {
+        setLootTable(table, getSeed());
+    }
+
+    @Override
+    public LootTable getLootTable() {
+        MinecraftKey nmsTable = getHandle().Q_(); // PAIL getLootTable
+        if (nmsTable == null) {
+            return null; // return empty loot table?
+        }
+
+        NamespacedKey key = CraftNamespacedKey.fromMinecraft(nmsTable);
+        return Bukkit.getLootTable(key);
+    }
+
+    @Override
+    public void setSeed(long seed) {
+        setLootTable(getLootTable(), seed);
+    }
+
+    @Override
+    public long getSeed() {
+        return getHandle().d; // PAIL rename lootTableSeed
+    }
+
+    private void setLootTable(LootTable table, long seed) {
+        MinecraftKey newKey = (table == null) ? null : CraftNamespacedKey.toMinecraft(table.getKey());
+        getHandle().a(newKey, seed);
+    }
+}

src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartHopper.java

@@ -8,10 +8,10 @@ import org.bukkit.entity.EntityType;
 import org.bukkit.entity.minecart.HopperMinecart;
 import org.bukkit.inventory.Inventory;
 
-final class CraftMinecartHopper extends CraftMinecart implements HopperMinecart {
+public final class CraftMinecartHopper extends CraftMinecartContainer implements HopperMinecart {
     private final CraftInventory inventory;
 
-    CraftMinecartHopper(CraftServer server, EntityMinecartHopper entity) {
+    public CraftMinecartHopper(CraftServer server, EntityMinecartHopper entity) {
         super(server, entity);
         inventory = new CraftInventory(entity);
     }

src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java

@@ -1,9 +1,13 @@
 package org.bukkit.craftbukkit.entity;
 
 import net.minecraft.server.EntityInsentient;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Mob;
+import org.bukkit.loot.LootTable;
 
 public abstract class CraftMob extends CraftLivingEntity implements Mob {
     public CraftMob(CraftServer server, EntityInsentient entity) {
@@ -36,4 +40,29 @@ public abstract class CraftMob extends CraftLivingEntity implements Mob {
     public String toString() {
         return "CraftMob";
     }
+
+    @Override
+    public void setLootTable(LootTable table) {
+        getHandle().bI = (table == null) ? null : CraftNamespacedKey.toMinecraft(table.getKey()); // PAIL rename lootTableKey
+    }
+
+    @Override
+    public LootTable getLootTable() {
+        if (getHandle().bI == null) {
+            getHandle().bI = getHandle().getLootTable(); // Restore to entity default
+        }
+
+        NamespacedKey key = CraftNamespacedKey.fromMinecraft(getHandle().bI); // PAIL rename lootTableKey
+        return Bukkit.getLootTable(key);
+    }
+
+    @Override
+    public void setSeed(long seed) {
+        getHandle().bJ = seed; // PAIL rename lootTableSeed
+    }
+
+    @Override
+    public long getSeed() {
+        return getHandle().bJ; // PAIL rename lootTableSeed
+    }
 }

src/test/java/org/bukkit/LootTablesTest.java

@@ -0,0 +1,22 @@
+package org.bukkit;
+
+import org.bukkit.loot.LootTable;
+import org.bukkit.loot.LootTables;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class LootTablesTest extends AbstractTestingBase {
+
+    @Test
+    public void testLootTablesEnumExists() {
+        LootTables[] tables = LootTables.values();
+
+        for (LootTables table : tables) {
+            LootTable lootTable = Bukkit.getLootTable(table.getKey());
+
+            Assert.assertNotNull("Unknown LootTable " + table.getKey(), lootTable);
+            Assert.assertEquals(lootTable.getKey(), table.getKey());
+        }
+    }
+}

src/test/java/org/bukkit/support/AbstractTestingBase.java

@@ -5,6 +5,7 @@ import java.util.Collections;
 import java.util.List;
 import net.minecraft.server.DispenserRegistry;
 import net.minecraft.server.EnumResourcePackType;
+import net.minecraft.server.LootTableRegistry;
 import net.minecraft.server.ResourceManager;
 import net.minecraft.server.ResourcePackVanilla;
 import net.minecraft.server.TagRegistry;
@@ -24,12 +25,16 @@ public abstract class AbstractTestingBase {
     // Materials that only exist in block form (or are legacy)
     public static final List<Material> INVALIDATED_MATERIALS;
 
+    public static final LootTableRegistry LOOT_TABLE_REGISTRY;
+    public static final TagRegistry TAG_REGISTRY;
+
     static {
         DispenserRegistry.c();
         // Set up resource manager
         ResourceManager resourceManager = new ResourceManager(EnumResourcePackType.SERVER_DATA);
-        // add tags for unit tests
-        resourceManager.a(new TagRegistry());
+        // add tags and loot tables for unit tests
+        resourceManager.a(TAG_REGISTRY = new TagRegistry());
+        resourceManager.a(LOOT_TABLE_REGISTRY = new LootTableRegistry());
         // Register vanilla pack
         resourceManager.a(Collections.singletonList(new ResourcePackVanilla("minecraft")));
 
@@ -43,6 +48,6 @@ public abstract class AbstractTestingBase {
             }
         }
         INVALIDATED_MATERIALS = builder.build();
-        Assert.assertTrue("Expected 543 invalidated materials (got " + INVALIDATED_MATERIALS.size() + ")", INVALIDATED_MATERIALS.size() == 543);
+        Assert.assertEquals("Expected 543 invalidated materials (got " + INVALIDATED_MATERIALS.size() + ")", 543, INVALIDATED_MATERIALS.size());
     }
 }

src/test/java/org/bukkit/support/DummyServer.java

@@ -8,10 +8,13 @@ import java.util.logging.Logger;
 
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
 import org.bukkit.Server;
+import org.bukkit.craftbukkit.CraftLootTable;
 import org.bukkit.craftbukkit.block.data.CraftBlockData;
 import org.bukkit.craftbukkit.inventory.CraftItemFactory;
 import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
 import org.bukkit.craftbukkit.util.Versioning;
 
 public class DummyServer implements InvocationHandler {
@@ -79,6 +82,15 @@ public class DummyServer implements InvocationHandler {
                         }
                     }
                 );
+            methods.put(Server.class.getMethod("getLootTable", NamespacedKey.class),
+                    new MethodHandler() {
+                        @Override
+                        public Object handle(DummyServer server, Object[] args) {
+                            NamespacedKey key = (NamespacedKey) args[0];
+                            return new CraftLootTable(key, AbstractTestingBase.LOOT_TABLE_REGISTRY.a(CraftNamespacedKey.toMinecraft(key)));
+                        }
+                    }
+                );
             Bukkit.setServer(Proxy.getProxyClass(Server.class.getClassLoader(), Server.class).asSubclass(Server.class).getConstructor(InvocationHandler.class).newInstance(new DummyServer()));
         } catch (Throwable t) {
             throw new Error(t);