unit tests DAGMCUniverse bounding_region bounding_box

tests/unit_tests/test_dagmc_universe.py

@@ -0,0 +1,38 @@
+import openmc
+import pytest
+
+
+def test_bounding_box():
+
+    u = openmc.DAGMCUniverse("tests/regression_tests/dagmc/universes/dagmc.h5m")
+
+    ll, ur = u.bounding_box
+    assert ll == pytest.approx((-25., -25., -25))
+    assert ur == pytest.approx((25., 25., 25))
+
+
+def test_bounding_region():
+
+    u = openmc.DAGMCUniverse("tests/regression_tests/dagmc/universes/dagmc.h5m")
+
+    region = u.bounding_region()  # should default to bounded_type='box'
+    assert isinstance(region, openmc.Region)
+    assert len(region) == 6
+    assert region[0].surface.type == 'x-plane'
+    assert region[1].surface.type == 'x-plane'
+    assert region[2].surface.type == 'y-plane'
+    assert region[3].surface.type == 'y-plane'
+    assert region[4].surface.type == 'z-plane'
+    assert region[5].surface.type == 'z-plane'
+    assert region[0].surface.boundary_type == 'vacuum'
+    assert region[1].surface.boundary_type == 'vacuum'
+    assert region[2].surface.boundary_type == 'vacuum'
+    assert region[3].surface.boundary_type == 'vacuum'
+    assert region[4].surface.boundary_type == 'vacuum'
+    assert region[5].surface.boundary_type == 'vacuum'
+
+    region = u.bounding_region(bounded_type='sphere', boundary_type='reflective')
+    assert isinstance(region, openmc.Region)
+    assert isinstance(region, openmc.Halfspace)
+    assert region.surface.type == 'sphere'
+    assert region.surface.boundary_type == 'reflective'