L'électron rare
26 lines
1.0 KiB
Python
26 lines
1.0 KiB
Python
"""Verify Metal uniform buffer layout constants after hand-feature expansion.
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The renderer imports pyobjc/Metal which is unavailable headless, so we test
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the struct layout independently and import the constants with a fallback.
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"""
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import struct
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def test_uniform_layout_struct():
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"""24 floats pack to exactly 96 bytes (16-byte aligned for Metal)."""
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assert struct.calcsize("24f") == 96
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def test_uniform_constants():
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"""UNIFORM_FLOATS == 24 and UNIFORM_SIZE == 96 from renderer module."""
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try:
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from data_only_viz.renderer import UNIFORM_FLOATS, UNIFORM_SIZE
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assert UNIFORM_FLOATS == 24, f"expected 24, got {UNIFORM_FLOATS}"
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assert UNIFORM_SIZE == 96, f"expected 96, got {UNIFORM_SIZE}"
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assert struct.calcsize(f"{UNIFORM_FLOATS}f") == 96
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except ImportError as exc: # pyobjc/Metal unavailable headless
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# Fallback: at minimum the struct math is correct
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import pytest
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pytest.skip(f"renderer import skipped headless ({exc}); struct layout verified by test_uniform_layout_struct")
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