Add jet, surface and fixed-patch tests and runnable examples

tests/integration/test_ddf_patch.py

@@ -5,9 +5,9 @@ Requires GPU."""
 import unittest
 
 import numpy as np
-import pycuda.autoinit
 
 from CelerisLab.simulation import Simulation
+from ._cases import make_sim
 from CelerisLab.lbm.descriptors import FLUID, OBSTACLE
 
 
@@ -17,7 +17,7 @@ class TestDDFPatchAddBody(unittest.TestCase):
     def test_add_body_runs_stably(self):
         """After adding a body, the simulation runs with finite forces
         for a moderate number of steps."""
-        sim = Simulation(device_id=0)
+        sim = make_sim()
         nx = sim.lbm_cfg.nx
         ny = sim.lbm_cfg.ny
         cx, cy = nx // 4, ny // 2
@@ -44,7 +44,7 @@ class TestDDFPatchRemoveBody(unittest.TestCase):
 
     def test_remove_body_released_region_is_fluid(self):
         """After removal, the former body center should be a fluid cell."""
-        sim = Simulation(device_id=0)
+        sim = make_sim()
         nx = sim.lbm_cfg.nx
         ny = sim.lbm_cfg.ny
         cx, cy = nx // 4, ny // 2
@@ -63,7 +63,7 @@ class TestDDFPatchRemoveBody(unittest.TestCase):
 
     def test_remove_body_finite_field(self):
         """After removal, the macroscopic field is finite."""
-        sim = Simulation(device_id=0)
+        sim = make_sim()
         nx = sim.lbm_cfg.nx
         ny = sim.lbm_cfg.ny
         cx, cy = nx // 4, ny // 2
@@ -91,7 +91,7 @@ class TestDDFPatchAddAndRemove(unittest.TestCase):
 
     def test_add_one_remove_another(self):
         """Add a body and remove a different one in the same sync."""
-        sim = Simulation(device_id=0)
+        sim = make_sim()
         nx = sim.lbm_cfg.nx
         ny = sim.lbm_cfg.ny
         cx, cy = nx // 4, ny // 2
@@ -119,8 +119,8 @@ class TestDDFPatchNoChange(unittest.TestCase):
 
     def test_no_mask_no_change(self):
         """When neither mask has any True entries, DDF should be unchanged."""
-        sim = Simulation(device_id=0)
-        sim.add_body("circle", center=(128, 128), radius=8)
+        sim = make_sim()
+        sim.add_body("circle", center=(sim.lbm_cfg.nx // 4, sim.lbm_cfg.ny // 2), radius=8)
         sim.initialize()
         sim.run(100)