feat: Implement CompatibleSaveGameCodec for block payload format and legacy support

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>
2026-03-23 15:18:49 +01:00
parent 85fddd3df5
commit 1ed63d5f9b
2 changed files with 369 additions and 0 deletions
@@ -164,6 +164,59 @@ void main() {
    expect(decoded.description, 'Legacy Save');
    expect(decoded.createdAtMs, 777);
  });
+
+  test('CompatibleSaveGameCodec round-trips with block payload format', () {
+    final WolfEngine engine = _buildEngine();
+    engine.init();
+
+    final CompatibleSaveGameCodec codec = CompatibleSaveGameCodec();
+    final SaveGameFile file = SaveGameFile(
+      slot: 2,
+      gameVersion: engine.data.version,
+      dataVersionName: engine.data.dataVersion.name,
+      description: 'Compatible Block Save',
+      createdAtMs: 1234,
+      snapshot: engine.captureSaveState(),
+      checksum: 0,
+    );
+
+    final Uint8List encoded = codec.encode(file);
+    final SaveGameFile decoded = codec.decode(encoded);
+
+    expect(decoded.slot, 2);
+    expect(decoded.description, 'Compatible Block Save');
+    expect(decoded.createdAtMs, 1234);
+    expect(
+      decoded.snapshot.currentEpisodeIndex,
+      file.snapshot.currentEpisodeIndex,
+    );
+    expect(decoded.snapshot.currentLevelIndex, file.snapshot.currentLevelIndex);
+  });
+
+  test('CompatibleSaveGameCodec decodes old envelope payload format', () {
+    final WolfEngine engine = _buildEngine();
+    engine.init();
+
+    final OriginalLayoutEnvelopeSaveGameCodec oldEnvelopeCodec =
+        OriginalLayoutEnvelopeSaveGameCodec();
+    final SaveGameFile file = SaveGameFile(
+      slot: 4,
+      gameVersion: engine.data.version,
+      dataVersionName: engine.data.dataVersion.name,
+      description: 'Old Envelope Save',
+      createdAtMs: 333,
+      snapshot: engine.captureSaveState(),
+      checksum: 0,
+    );
+    final Uint8List oldEncoded = oldEnvelopeCodec.encode(file);
+
+    final CompatibleSaveGameCodec compatibleCodec = CompatibleSaveGameCodec();
+    final SaveGameFile decoded = compatibleCodec.decode(oldEncoded);
+
+    expect(decoded.slot, 4);
+    expect(decoded.description, 'Old Envelope Save');
+    expect(decoded.createdAtMs, 333);
+  });
 }

 class _TestInput extends Wolf3dInput {