from gaussian_ply_to_splat import convert_gaussian_ply
from simam3d_core import write_gaussian_ply
from validate_splat import validate_splat


def test_validate_splat_accepts_converter_output(tmp_path):
    source = tmp_path / "source.ply"
    output = tmp_path / "scene.splat"
    write_gaussian_ply(source, [[0, 0, 1]], [[120, 140, 160]])
    convert_gaussian_ply(source, output)
    report = validate_splat(output)
    assert report["vertex_count"] == 1
    assert report["record_bytes"] == 32


def test_validate_splat_rejects_truncated_record(tmp_path):
    path = tmp_path / "broken.splat"
    path.write_bytes(b"\0" * 31)
    try:
        validate_splat(path)
    except ValueError as exc:
        assert "divisible" in str(exc)
    else:
        raise AssertionError("truncated splat record was accepted")