adding back files to be reviewed

tests/regression_tests/plot_voxel/geometry.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<geometry>
+
+  <surface id="1" type="z-cylinder" coeffs="0 0 2" />
+  <surface id="2" type="z-cylinder" coeffs="0 0 5" />
+  <surface id="3" type="z-cylinder" coeffs="0 0 10" boundary="vacuum" />
+  <surface id="4" type="y-plane" coeffs="5" boundary="vacuum" />
+
+  <cell id="1" material="1" region="  -1 -4" />
+  <cell id="2" material="3" region="1 -2 -4" />
+  <cell id="3" material="2" region="2 -3 -4" />
+
+</geometry>

tests/regression_tests/plot_voxel/materials.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<materials>
+
+  <material id="1">
+    <density value="4.5" units="g/cc" />
+    <nuclide name="U235" ao="1.0" />
+  </material>
+
+  <material id="2">
+    <density value="4.5" units="g/cc" />
+    <nuclide name="U235" ao="1.0" />
+  </material>
+
+  <material id="3">
+    <density value="4.5" units="g/cc" />
+    <nuclide name="U235" ao="1.0" />
+  </material>
+
+</materials>

tests/regression_tests/plot_voxel/plots.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<plots>
+
+  <plot id="4" type="voxel">
+    <pixels>50 50 10</pixels>
+    <origin>0. 0. 0.</origin>
+    <width>20 20 10</width>
+  </plot>
+
+</plots>

tests/regression_tests/plot_voxel/results_true.dat

@@ -0,0 +1 @@
+ff596b17d2cd33f964a952279b824292272ab73f57ded94812286e6bce12b5c54852d5ccd1dd137fa6312101568c06510cd89f822469d6c904a17f96259e4d03

tests/regression_tests/plot_voxel/settings.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<settings>
+
+  <run_mode>plot</run_mode>
+
+  <mesh id="1">
+    <dimension>5 4 3</dimension>
+    <lower_left>-10 -10 -10</lower_left>
+    <upper_right>10 10 10</upper_right>
+  </mesh>
+  <entropy_mesh>1</entropy_mesh>
+
+</settings>

tests/regression_tests/plot_voxel/test.py

@@ -0,0 +1,62 @@
+import glob
+import hashlib
+import os
+from subprocess import check_call
+
+import h5py
+import openmc
+import pytest
+
+from tests.testing_harness import TestHarness
+from tests.regression_tests import config
+
+
+vtk = pytest.importorskip('vtk')
+class PlotVoxelTestHarness(TestHarness):
+    """Specialized TestHarness for running OpenMC voxel plot tests."""
+    def __init__(self, plot_names):
+        super().__init__(None)
+        self._plot_names = plot_names
+
+    def _run_openmc(self):
+        openmc.plot_geometry(openmc_exec=config['exe'])
+
+        check_call(['../../../scripts/openmc-voxel-to-vtk'] +
+                   glob.glob('plot_4.h5'))
+                
+    def _test_output_created(self):
+        """Make sure *.ppm has been created."""
+        for fname in self._plot_names:
+            assert os.path.exists(fname), 'Plot output file does not exist.'
+
+    def _cleanup(self):
+        super()._cleanup()
+        for fname in self._plot_names:
+            if os.path.exists(fname):
+                os.remove(fname)
+
+    def _get_results(self):
+        """Return a string hash of the plot files."""
+        outstr = bytes()
+
+        for fname in self._plot_names:
+            if fname.endswith('.h5'):
+                # Add voxel data to results
+                with h5py.File(fname, 'r') as fh:
+                    outstr += fh.attrs['filetype']
+                    outstr += fh.attrs['num_voxels'].tostring()
+                    outstr += fh.attrs['lower_left'].tostring()
+                    outstr += fh.attrs['voxel_width'].tostring()
+                    outstr += fh['data'].value.tostring()
+
+        # Hash the information and return.
+        sha512 = hashlib.sha512()
+        sha512.update(outstr)
+        outstr = sha512.hexdigest()
+
+        return outstr
+
+
+def test_plot_voxel():
+    harness = PlotVoxelTestHarness(('plot_4.h5', 'plot.vti'))
+    harness.main()