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OBLITERATUS/tests/test_app_vram.py
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Python

"""Deterministic contracts for the accelerator-memory display."""
from __future__ import annotations
from types import SimpleNamespace
from obliteratus.ui_vram import render_vram_html
def _memory(used, reserved, total, name):
return SimpleNamespace(
used_gb=used,
reserved_gb=reserved,
total_gb=total,
device_name=name,
)
def test_vram_html_covers_cpu_single_and_multi_accelerator_topologies():
device = SimpleNamespace(is_gpu_available=lambda: False)
html = render_vram_html(device)
assert "CPU ONLY — NO GPU DETECTED" in html
assert "data-device-index" not in html
device = SimpleNamespace(
is_gpu_available=lambda: True,
is_cuda=lambda: False,
get_memory_info=lambda _index=0: _memory(4, 0, 16, "Apple M3 (MPS)"),
)
html = render_vram_html(device)
assert html.count("data-device-index=") == 1
assert 'data-device-index="single"' in html
assert "Apple M3 (MPS)" in html
assert "4.0 / 16.0 GB (25%)" in html
assert "Automatic sharding" not in html
memories = [
_memory(4, 5, 80, "NVIDIA A100"),
_memory(16, 20, 80, "NVIDIA A100"),
_memory(72, 74, 80, "NVIDIA A100"),
]
queried = []
def memory_info(index):
queried.append(index)
return memories[index]
device = SimpleNamespace(
is_gpu_available=lambda: True,
is_cuda=lambda: True,
device_count=lambda: len(memories),
get_memory_info=memory_info,
)
html = render_vram_html(device)
assert queried == [0, 1, 2]
assert html.count("data-device-index=") == 3
assert "GPU 0 · NVIDIA A100" in html
assert "GPU 1 · NVIDIA A100" in html
assert "GPU 2 · NVIDIA A100" in html
assert "Automatic sharding uses additional GPUs" in html
memories = [
_memory(2, 3, 24, "NVIDIA RTX 4090"),
_memory(8, 9, 80, "NVIDIA A100"),
]
device.device_count = lambda: len(memories)
device.get_memory_info = memories.__getitem__
html = render_vram_html(device)
assert "GPU 0 · NVIDIA RTX 4090" in html
assert "GPU 1 · NVIDIA A100" in html
assert html.index("GPU 0 · NVIDIA RTX 4090") < html.index("GPU 1 · NVIDIA A100")
def test_vram_html_handles_memory_errors():
device = SimpleNamespace(
is_gpu_available=lambda: True,
is_cuda=lambda: True,
device_count=lambda: 1,
get_memory_info=lambda _index: (_ for _ in ()).throw(RuntimeError("unavailable")),
)
assert "Memory: unavailable" in render_vram_html(device)