a7bb9496ae
Vanilla-faithful overworld generator (final_density + multi-noise biomes), full connection lifecycle (status/login/configuration/play), chunk streaming, creative block editing, and the protocol/nbt/registry infrastructure.
46 lines
1.4 KiB
Go
46 lines
1.4 KiB
Go
package world
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import (
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"bytes"
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"os"
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"testing"
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"regionio/internal/protocol"
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)
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// extractSectionData returns the section-data byte slice of a level_chunk body
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// (the bytes covered by the VarInt size that follows the heightmaps).
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func extractSectionData(t *testing.T, body []byte) []byte {
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t.Helper()
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r := protocol.NewReader(body[8:]) // skip chunk X,Z
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count, _ := r.VarInt()
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for i := int32(0); i < count; i++ {
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r.VarInt() // heightmap type
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n, _ := r.VarInt() // long count
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for j := int32(0); j < n; j++ {
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r.Int64()
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}
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}
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size, _ := r.VarInt()
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consumed := len(body[8:]) - r.Remaining()
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return body[8+consumed : 8+consumed+int(size)]
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}
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// TestGoldenAgainstVanilla asserts our flat-chunk section data is byte-for-byte
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// identical to a chunk captured from the official 26.1.2 server (same world
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// coordinate). This guards the paletted-container and heightmap encoding.
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// Light is intentionally not compared (we send full-bright, which differs).
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func TestGoldenAgainstVanilla(t *testing.T) {
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vanilla, err := os.ReadFile("testdata/vanilla_flat_chunk.bin")
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if err != nil {
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t.Fatalf("read fixture: %v", err)
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}
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ours := GenerateFlat(0, -1).Encode() // fixture was captured at chunk (0, -1)
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want := extractSectionData(t, vanilla)
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got := extractSectionData(t, ours)
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if !bytes.Equal(want, got) {
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t.Fatalf("section data differs: vanilla=%d bytes, ours=%d bytes", len(want), len(got))
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}
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}
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