diff --git a/core/src/main/java/mc/core/world/block/AbstractBlock.java b/core/src/main/java/mc/core/world/block/AbstractBlock.java
index 92fb3f2..0c6d90b 100644
--- a/core/src/main/java/mc/core/world/block/AbstractBlock.java
+++ b/core/src/main/java/mc/core/world/block/AbstractBlock.java
@@ -14,7 +14,7 @@ public abstract class AbstractBlock implements Block {
     @Setter
     private Location location;
     @Getter
-    private int light = 15;
+    private int light = 0;
     @Getter
     private final BlockType blockType;
     private final Map<String, Tag<?>> nbtTagsMap = new HashMap<>();
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DummyWorld.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DummyWorld.java
new file mode 100644
index 0000000..f485394
--- /dev/null
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DummyWorld.java
@@ -0,0 +1,133 @@
+package mc.core.network.proto_1_12_2.packets;
+
+import mc.core.EntityLocation;
+import mc.core.world.Biome;
+import mc.core.world.World;
+import mc.core.world.WorldType;
+import mc.core.world.block.Block;
+import mc.core.world.block.BlockFactory;
+import mc.core.world.block.BlockType;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+
+public class DummyWorld implements World {
+    private class DummyChunkSection implements ChunkSection {
+        @Override
+        public int getSkyLight(int x, int y, int z) {
+            if (y <= 3) return 0;
+            else return 15;
+        }
+
+        @Override
+        public void setSkyLight(int x, int y, int z, int lightLevel) {
+        }
+
+        @Override
+        public int getAddition(int x, int y, int z) {
+            return 0;
+        }
+
+        @Override
+        public void setAddition(int x, int y, int z, int value) {
+        }
+
+        @Override
+        public int getX() {
+            return 0;
+        }
+
+        @Override
+        public int getY() {
+            return 0;
+        }
+
+        @Override
+        public int getZ() {
+            return 0;
+        }
+
+        @Override
+        public void setBlock(Block block) {
+        }
+
+        @Override
+        public Block getBlock(int x, int y, int z) {
+            BlockFactory blockFactory = new BlockFactory();
+
+            if (y == 0) return blockFactory.create(BlockType.BEDROCK, x, y, z, getWorld());
+            else if (y >= 1 && y <= 2) return blockFactory.create(BlockType.DIRT, x, y, z, getWorld());
+            else if (y == 3) return blockFactory.create(BlockType.GRASS, x, y, z, getWorld());
+            else return blockFactory.create(BlockType.AIR, x, y, z, getWorld());
+        }
+
+        @Override
+        public World getWorld() {
+            return DummyWorld.this;
+        }
+    }
+
+    private class DummyChunk implements Chunk {
+        @Override
+        public World getWorld() {
+            return DummyWorld.this;
+        }
+
+        @Override
+        public void setWorld(World world) {
+        }
+
+        @Override
+        public ChunkSection getChunkSection(int height) {
+            if (height < 1) return new DummyChunkSection();
+            else return null;
+        }
+
+        @Override
+        public void setChunkSection(int height, ChunkSection chunkSection) {
+        }
+
+        @Override
+        public Biome getBiome(int localX, int localZ) {
+            return Biome.PLAINS;
+        }
+
+        @Override
+        public void setBiome(int localX, int localZ, Biome biome) {
+        }
+
+        @Override
+        public int getX() {
+            return 0;
+        }
+
+        @Override
+        public int getZ() {
+            return 0;
+        }
+    }
+
+    private final Chunk chunk = new DummyChunk();
+
+    @Override
+    public WorldType getWorldType() {
+        return WorldType.FLAT;
+    }
+
+    @Override
+    public EntityLocation getSpawn() {
+        return null;
+    }
+
+    @Override
+    public void setSpawn(EntityLocation location) {
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        return chunk;
+    }
+
+    @Override
+    public void setChunk(int x, int z, Chunk chunk) {
+    }
+}
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/TestChunkdataPacket.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/TestChunkdataPacket.java
new file mode 100644
index 0000000..05f8528
--- /dev/null
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/TestChunkdataPacket.java
@@ -0,0 +1,40 @@
+package mc.core.network.proto_1_12_2.packets;
+
+import com.google.common.io.ByteStreams;
+import mc.core.network.proto_1_12_2.ByteArrayOutputNetStream;
+import mc.core.world.World;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.*;
+
+public class TestChunkdataPacket {
+    private static byte[] expectedPacketData;
+
+    @BeforeClass
+    public static void beforeClassTest() throws IOException {
+        InputStream inputStream = TestChunkdataPacket.class.getResourceAsStream("ChunkDataPacket.bin");
+        expectedPacketData = ByteStreams.toByteArray(inputStream);
+    }
+
+    private World createDummyWorld() {
+        return new DummyWorld();
+    }
+
+    @Test
+    public void test() {
+        ChunkDataPacket packet = new ChunkDataPacket();
+        packet.setX(0);
+        packet.setZ(0);
+        packet.setChunk(createDummyWorld().getChunk(0, 0));
+        packet.setInitChunk(true);
+
+        ByteArrayOutputNetStream netStream = new ByteArrayOutputNetStream();
+        packet.writeSelf(netStream);
+        byte[] actualPacketData = netStream.toByteArray();
+
+        Assert.assertEquals(expectedPacketData.length, actualPacketData.length);
+        Assert.assertArrayEquals(expectedPacketData, actualPacketData);
+    }
+}
diff --git a/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin
new file mode 100644
index 0000000..fcfd0c0
Binary files /dev/null and b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin differ