Implemented IO test for octree mesh.

tests/mesh/test_MeshIO.py

@@ -0,0 +1,47 @@
+import numpy as np
+import unittest
+import SimPEG as simpeg
+from SimPEG.Mesh import TensorMesh, TreeMesh
+
+
+class TestOcTreeIO(unittest.TestCase):
+
+    def setUp(self):
+        h = np.ones(16)
+        mesh = simpeg.Mesh.TreeMesh([h,2*h,3*h])
+        mesh.refine(3)
+        mesh._refineCell([0,0,0,3])
+        mesh._refineCell([0,2,0,3])
+        self.mesh = mesh
+
+    def test_UBCfiles(self):
+
+        mesh = self.mesh
+        # Make a vector
+        vec = np.arange(mesh.nC)
+        # Write aand read
+        simpeg.Utils.meshutils.writeUBCocTreeFiles('temp.msh',mesh,{'arange.txt':vec})
+        meshUBC, vecUBC = simpeg.Utils.meshutils.readUBCocTreeFiles('temp.msh',['arange.txt'])
+
+        # The mesh
+        assert mesh.__str__() == meshUBC.__str__()
+        assert np.sum(mesh.gridCC - meshUBC.gridCC) == 0
+        assert np.sum(vec - vecUBC) == 0
+        assert np.all(np.array(mesh.h) - np.array(meshUBC.h) == 0)
+        print 'IO of UBC octree files is working'
+
+    def test_VTUfiles(self):
+        mesh = self.mesh
+        vec = np.arange(mesh.nC)
+        try:
+            simpeg.Utils.meshutils.writeVTUFile('test.vtu',mesh,{'arange':vec})
+            run = True
+        except:
+            run = False
+        assert run
+        print 'Writing of VTU files is working'
+
+
+
+if __name__ == '__main__':
+    unittest.main()