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Paper/patches/server/0004-Test-changes.patch
Bjarne Koll d9699b5935
Configure mokitor Server mock as stubOnly (#8861) 
A recent patch moved the internal unit tests to mokito, allowing
deep mocking to easily setup a mocked server instance.
While this change is useful, the server's Server#getItemFactory methods
is one of the hottest paths during unit testing, being called numerous
times by material tests.
As mokito mocks keep track of each invocation to allow for verifications
of invocations down the line, the server mock allocates a huge amount of
memory to keep track of all invocations, ultimately leading to an OOM
exception.

The previous solution solved this by increasing the tests memory to 2 GB,
however as of right now simply configuring the server mock as "stubOnly",
properly prevents the overflow of invocation records as none of the unit
test code relies on invocation verification.
2023-02-21 17:18:49 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 13 Feb 2023 14:14:56 -0800
Subject: [PATCH] Test changes
diff --git a/build.gradle.kts b/build.gradle.kts
index 064a0c5b2a4b379ceec84652ff1e004d57419115..218a0db30ac8e4403da4ee50ca0a67ca7bda40e4 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,6 +12,7 @@ dependencies {
implementation("org.apache.logging.log4j:log4j-iostreams:2.19.0") // Paper - remove exclusion
implementation("org.ow2.asm:asm:9.3")
implementation("org.ow2.asm:asm-commons:9.3") // Paper - ASM event executor generation
+ testImplementation("org.mockito:mockito-core:4.9.0") // Paper - switch to mockito
implementation("commons-lang:commons-lang:2.6")
runtimeOnly("org.xerial:sqlite-jdbc:3.36.0.3")
runtimeOnly("mysql:mysql-connector-java:8.0.29")
diff --git a/src/test/java/io/papermc/paper/testing/DummyServer.java b/src/test/java/io/papermc/paper/testing/DummyServer.java
new file mode 100644
index 0000000000000000000000000000000000000000..c6503ff76f56bab5f383f0ca17d137155e9be447
--- /dev/null
+++ b/src/test/java/io/papermc/paper/testing/DummyServer.java
@@ -0,0 +1,67 @@
+package io.papermc.paper.testing;
+
+import java.util.logging.Logger;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Server;
+import org.bukkit.command.SimpleCommandMap;
+import org.bukkit.craftbukkit.CraftRegistry;
+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.plugin.PluginManager;
+import org.bukkit.plugin.SimplePluginManager;
+import org.bukkit.support.AbstractTestingBase;
+import org.mockito.Mockito;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public final class DummyServer {
+
+ @SuppressWarnings({"deprecation", "removal"})
+ public static void setup() {
+ //noinspection ConstantValue
+ if (Bukkit.getServer() != null) {
+ return;
+ }
+
+ final Server dummyServer = mock(Server.class, Mockito.withSettings().stubOnly());
+
+ final Logger logger = Logger.getLogger(DummyServer.class.getCanonicalName());
+ when(dummyServer.getLogger()).thenReturn(logger);
+ when(dummyServer.getName()).thenReturn(DummyServer.class.getSimpleName());
+ when(dummyServer.getVersion()).thenReturn("Version_" + DummyServer.class.getPackage().getImplementationVersion());
+ when(dummyServer.getBukkitVersion()).thenReturn("BukkitVersion_" + DummyServer.class.getPackage().getImplementationVersion());
+
+ final Thread currentThread = Thread.currentThread();
+ when(dummyServer.isPrimaryThread()).thenAnswer(ignored -> Thread.currentThread().equals(currentThread));
+
+ when(dummyServer.getItemFactory()).thenReturn(CraftItemFactory.instance());
+
+ when(dummyServer.getUnsafe()).thenAnswer(ignored -> CraftMagicNumbers.INSTANCE); // lambda for lazy load
+
+ when(dummyServer.createBlockData(any(Material.class))).thenAnswer(invocation -> {
+ return CraftBlockData.newData(invocation.getArgument(0, Material.class), null);
+ });
+
+ when(dummyServer.getLootTable(any(NamespacedKey.class))).thenAnswer(invocation -> {
+ final NamespacedKey key = invocation.getArgument(0, NamespacedKey.class);
+ return new org.bukkit.craftbukkit.CraftLootTable(key, AbstractTestingBase.DATA_PACK.getLootTables().get(CraftNamespacedKey.toMinecraft(key)));
+ });
+
+ when(dummyServer.getRegistry(any())).thenAnswer(invocation -> {
+ // LazyRegistry because the vanilla data hasn't been bootstrapped yet.
+ return new LazyRegistry(() -> CraftRegistry.createRegistry(invocation.getArgument(0, Class.class), AbstractTestingBase.REGISTRY_CUSTOM));
+ });
+
+ final PluginManager pluginManager = new SimplePluginManager(dummyServer, new SimpleCommandMap(dummyServer));
+ when(dummyServer.getPluginManager()).thenReturn(pluginManager);
+
+ Bukkit.setServer(dummyServer);
+
+ }
+}
diff --git a/src/test/java/io/papermc/paper/testing/LazyRegistry.java b/src/test/java/io/papermc/paper/testing/LazyRegistry.java
new file mode 100644
index 0000000000000000000000000000000000000000..8dd0df8c2cc25d37a2590a07872682230a9335f2
--- /dev/null
+++ b/src/test/java/io/papermc/paper/testing/LazyRegistry.java
@@ -0,0 +1,23 @@
+package io.papermc.paper.testing;
+
+import java.util.Iterator;
+import java.util.function.Supplier;
+import org.bukkit.Keyed;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public record LazyRegistry(Supplier<Registry<Keyed>> supplier) implements Registry<Keyed> {
+
+ @NotNull
+ @Override
+ public Iterator<Keyed> iterator() {
+ return this.supplier().get().iterator();
+ }
+
+ @Override
+ public @Nullable Keyed get(@NotNull final NamespacedKey key) {
+ return this.supplier().get().get(key);
+ }
+}
diff --git a/src/test/java/org/bukkit/support/AbstractTestingBase.java b/src/test/java/org/bukkit/support/AbstractTestingBase.java
index 492c1ec28a9f1facb117d05245b32231554385ad..8013cc99c063d2ca0c578c093e3112676f5361b7 100644
--- a/src/test/java/org/bukkit/support/AbstractTestingBase.java
+++ b/src/test/java/org/bukkit/support/AbstractTestingBase.java
@@ -2,7 +2,6 @@ package org.bukkit.support;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.MoreExecutors;
-import java.util.Collections;
import java.util.List;
import net.minecraft.SharedConstants;
import net.minecraft.commands.Commands;
@@ -49,6 +48,7 @@ public abstract class AbstractTestingBase {
LayeredRegistryAccess<RegistryLayer> layers = RegistryLayer.createRegistryAccess();
layers = WorldLoader.loadAndReplaceLayer(resourceManager, layers, RegistryLayer.WORLDGEN, RegistryDataLoader.WORLDGEN_REGISTRIES);
REGISTRY_CUSTOM = layers.compositeAccess().freeze();
+ io.papermc.paper.testing.DummyServer.setup(); // Paper
// Register vanilla pack
DATA_PACK = ReloadableServerResources.loadResources(resourceManager, REGISTRY_CUSTOM, FeatureFlags.REGISTRY.allFlags(), Commands.CommandSelection.DEDICATED, 0, MoreExecutors.directExecutor(), MoreExecutors.directExecutor()).join();
// Bind tags
@@ -56,7 +56,6 @@ public abstract class AbstractTestingBase {
// Biome shortcut
BIOMES = REGISTRY_CUSTOM.registryOrThrow(Registries.BIOME);
- DummyServer.setup();
DummyEnchantments.setup();
ImmutableList.Builder<Material> builder = ImmutableList.builder();
diff --git a/src/test/java/org/bukkit/support/DummyServer.java b/src/test/java/org/bukkit/support/DummyServer.java
deleted file mode 100644
index 946497353a64421592d2bae012c9a3cb874dd5b8..0000000000000000000000000000000000000000
--- a/src/test/java/org/bukkit/support/DummyServer.java
+++ /dev/null
@@ -1,127 +0,0 @@
-package org.bukkit.support;
-
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-import java.lang.reflect.Proxy;
-import java.util.HashMap;
-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.CraftRegistry;
-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 final class DummyServer implements InvocationHandler {
- private static interface MethodHandler {
- Object handle(DummyServer server, Object[] args);
- }
- private static final HashMap<Method, MethodHandler> methods = new HashMap<Method, MethodHandler>();
- static {
- try {
- methods.put(
- Server.class.getMethod("getItemFactory"),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return CraftItemFactory.instance();
- }
- }
- );
- methods.put(
- Server.class.getMethod("getName"),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return DummyServer.class.getName();
- }
- }
- );
- methods.put(
- Server.class.getMethod("getVersion"),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return DummyServer.class.getPackage().getImplementationVersion();
- }
- }
- );
- methods.put(
- Server.class.getMethod("getBukkitVersion"),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return Versioning.getBukkitVersion();
- }
- }
- );
- methods.put(
- Server.class.getMethod("getLogger"),
- new MethodHandler() {
- final Logger logger = Logger.getLogger(DummyServer.class.getCanonicalName());
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return logger;
- }
- }
- );
- methods.put(
- Server.class.getMethod("getUnsafe"),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return CraftMagicNumbers.INSTANCE;
- }
- }
- );
- methods.put(
- Server.class.getMethod("createBlockData", Material.class),
- new MethodHandler() {
- final Logger logger = Logger.getLogger(DummyServer.class.getCanonicalName());
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return CraftBlockData.newData((Material) args[0], null);
- }
- }
- );
- 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.DATA_PACK.getLootTables().get(CraftNamespacedKey.toMinecraft(key)));
- }
- }
- );
- methods.put(Server.class.getMethod("getRegistry", Class.class),
- new MethodHandler() {
- @Override
- public Object handle(DummyServer server, Object[] args) {
- return CraftRegistry.createRegistry((Class) args[0], AbstractTestingBase.REGISTRY_CUSTOM);
- }
- }
- );
- 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);
- }
- }
-
- public static void setup() {}
-
- private DummyServer() {};
-
- @Override
- public Object invoke(Object proxy, Method method, Object[] args) {
- MethodHandler handler = DummyServer.methods.get(method);
- if (handler != null) {
- return handler.handle(this, args);
- }
- throw new UnsupportedOperationException(String.valueOf(method));
- }
-}
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