test(simulation): golden-seed regression for the Layer 0->1 cascade (#952, D-200)

Browse Source

End-to-end determinism guard. cascade_golden.rs pins two artifacts for a real
committed body heightmap (GJ1c) in one diffable JSON golden
(server/tests/golden/cascade_layer1.json):
- Layer 0: SHA-256 of the source heightmap.png bytes (flips if the Python
  heightmap generator or the file changes)
- Layer 1: the serialized Layer1Output of run_cascade on a 128x64 downsample
  (flips if the Rust drainage/feature/sub-biome code changes)

JSON (not the msgpack discussed in refinement) to match the existing
golden_suite.rs convention and stay diffable — a failure shows what drifted.
UPDATE_GOLDEN=1 regenerates; wired into `make golden-update`.

Adds Serialize/Deserialize to RiverNetwork/DrainageBasin/Layer1Output and a
sha2 dev-dependency.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

...

This commit is contained in:

jpmschweitzer

2026-05-23 12:26:07 +02:00

co-authored by Claude Opus 4.7

parent 9bc2ed28f2

commit aaee9ecb06

7 changed files with 5693 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

server/tests/golden/cascade_layer1.json

+5512

File diff suppressed because it is too large Load Diff