start work on mca to packet conversion

level/anvil/level_test.go

@@ -1,13 +1,17 @@
 package anvil_test
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"os"
 	"testing"
 
+	"github.com/admin-else/strom/level"
 	"github.com/admin-else/strom/level/anvil"
+	"github.com/admin-else/strom/nbt"
 	"github.com/admin-else/strom/util"
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestLevel(t *testing.T) {
@@ -45,10 +49,45 @@ func TestRegionFile(t *testing.T) {
 }
 
 func TestConverToPacket(t *testing.T) {
-	f, err := os.Open("./level/anvil/testdata/r.0.0.mca")
+	f, err := os.Open("./testdata/r.0.0.mca")
 	if err != nil {
+		t.Errorf("Failed to open file: %v", err)
 		return
 	}
 	defer f.Close()
+	mca, err := anvil.ReadChunkHeader(f)
+	if err != nil {
+		t.Errorf("Failed to read chunk header: %v", err)
+		return
+	}
+	var n *nbt.Tag
+	n, err = mca.ChunkAt(f, 0, 0)
+	if err != nil {
+		t.Errorf("Failed to read chunk: %v", err)
+		return
+	}
+	var chunk anvil.Chunk
+	err = nbt.Format.Decode(n.Value, &chunk)
+	if err != nil {
+		t.Errorf("Failed to decode chunk: %v", err)
+		return
+	}
+	var packetChunk *level.Chunk
+	packetChunk, err = chunk.ToStorage("1.21.11")
+	if err != nil {
+		t.Errorf("Failed to convert chunk: %v", err)
+		return
+	}
+	buffer := bytes.NewBuffer(nil)
+	err = packetChunk.WriteChunkData(buffer)
+	if err != nil {
+		t.Errorf("Failed to write chunk data: %v", err)
+		return
+	}
+	a := chunk00.ChunkData.Val
+	b := buffer.Bytes()
+	if !bytes.Equal(a, b) {
+		t.Errorf("Chunk data is different: %v", cmp.Diff(a, b))
+	}
 
 }