Add LazyPacketTest

src/test/java/network/LazyPacketTest.java

@@ -0,0 +1,29 @@
+package network;
+
+import net.kyori.adventure.text.Component;
+import net.minestom.server.message.ChatPosition;
+import net.minestom.server.network.packet.server.LazyPacket;
+import net.minestom.server.network.packet.server.play.ChatMessagePacket;
+import org.junit.jupiter.api.Test;
+
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class LazyPacketTest {
+
+    @Test
+    public void testCache() {
+        var packet = new ChatMessagePacket(Component.text("Hello World!"), ChatPosition.CHAT, UUID.randomUUID());
+        AtomicBoolean called = new AtomicBoolean(false);
+        var lazy = new LazyPacket(() -> {
+            if (called.getAndSet(true))
+                fail();
+            return packet;
+        });
+        assertSame(packet, lazy.packet());
+        assertSame(packet, lazy.packet());
+    }
+}