54 lines
2.9 KiB
Python
54 lines
2.9 KiB
Python
"""Host guards and source contract for MRT reuse in refined/blocked stepping (no CUDA)."""
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from pathlib import Path
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import unittest
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from CelerisLab.config import LBMConfig
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from CelerisLab.lbm.refinement import FixedPatch2D
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KERNELS = Path(__file__).resolve().parents[2] / "src/CelerisLab/lbm/kernels"
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BOUNDS = (8, 6, 16, 14)
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class RefinementMRTHost(unittest.TestCase):
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def test_patch_accepts_implemented_models(self):
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for collision in ("SRT", "MRT"):
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with self.subTest(collision=collision):
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FixedPatch2D.from_config(LBMConfig(nx=24, ny=20, viscosity=.1, collision=collision), BOUNDS)
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def test_patch_rejects_unimplemented(self):
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for options in (dict(collision="TRT"), dict(collision="MRT", les_enabled=True)):
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with self.subTest(options=options), self.assertRaises(ValueError):
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FixedPatch2D.from_config(LBMConfig(nx=24, ny=20, viscosity=.1, **options), BOUNDS)
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def test_srt_statements_and_guards_preserved(self):
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"""MRT is an additive compile-time branch; SRT statements and other guards remain."""
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blocks = (KERNELS / "blocked.cu").read_text() + (KERNELS / "step/block_step.cu").read_text()
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channel = (KERNELS / "step/block_channel.cu").read_text()
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block_collision = (KERNELS / "operators/block_collision.cuh").read_text()
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self.assertIn('#include "operators/block_collision.cuh"', blocks)
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self.assertEqual(blocks.count("block_collide(f);"), 1)
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for text in ("compute_feq_from_momentum(drho, jx, jy, ux, uy, feq);",
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"compute_feq(rho, ux, uy, feq);",
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"collide_srt_no_force(f, feq, d_params.omega);"):
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self.assertIn(text, block_collision)
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self.assertIn("collide_srt(f, feq, forcing, omega);", block_collision)
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self.assertIn("#elif BLOCK_ROOT_BC == 2", block_collision)
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self.assertEqual(channel.count("block_collide(f);"), 1)
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self.assertNotIn("collide_mrt_unforced(f);", channel)
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for source in (blocks,):
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self.assertIn("(COLLISION_MODEL != 0 && COLLISION_MODEL != 2)", source)
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self.assertIn("USE_LES", source)
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self.assertIn("STORE_PRECISION != 0", source)
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self.assertIn('#if COLLISION_MODEL == 2\n#include "operators/collision_mrt.cuh"\n#endif', source)
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# One shared unforced MRT body; each blocked/patch path calls it exactly once.
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mrt = (KERNELS / "operators/collision_mrt.cuh").read_text()
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self.assertEqual(mrt.count("void collide_mrt_unforced("), 1)
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for source in (blocks + "\n" + block_collision, channel + "\n" + block_collision):
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self.assertEqual(source.count("collide_mrt_unforced(f);"), 1)
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self.assertNotIn("collide_mrt_no_force(", source)
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self.assertNotIn("compute_rho_u(f, rho, ux, uy);\n collide_mrt", source)
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self.assertNotRegex(source, r"compute_rho_u\(f, rho, ux, uy\);\s*collide_mrt")
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if __name__ == "__main__": unittest.main()
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