Paper/patches/server/0004-Test-changes.patch

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 d77f15c58f41f1e00c75e0a022919bb7dacc9926..0d04c3af92f7d4e63b1178247e493174cedd9178 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:9.4")
     implementation("org.ow2.asm:asm-commons:9.4") // 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:3.41.0.0")
     runtimeOnly("com.mysql:mysql-connector-j:8.0.32")
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 5b8a8f79776fe4c070b13f3c79df96ecea619df8..883b2061578032affd9cd5629948054ecf52e40d 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));
-    }
-}