Minor changes and comments.

SimPEG/getEdgeInnerProducts.py

@@ -58,7 +58,7 @@ def getEdgeInnerProduct(mesh, sigma):
     P111 = Pxxx([[0, 1, 1], [1, 0, 1], [1, 1, 0]])
 
     if sigma.size == mesh.nC:  # Isotropic!
-        sigma = mkvc(sigma)
+        sigma = mkvc(sigma)  # ensure it is a vector.
         Sigma = sdiag(np.r_[sigma, sigma, sigma])
     elif sigma.shape[1] == 3:  # Diagonal tensor
         Sigma = sdiag(np.r_[sigma[:, 0], sigma[:, 1], sigma[:, 2]])

SimPEG/tests/test_massMatrices.py

@@ -1,18 +1,16 @@
 import numpy as np
 import unittest
+from OrderTest import OrderTest
 import sys
 sys.path.append('../')
-from OrderTest import OrderTest
 from getEdgeInnerProducts import *
 
 
 class TestEdgeInnerProduct(OrderTest):
-    """Integrate a function over a unit cube domain."""
+    """Integrate an edge function over a unit cube domain using edgeInnerProducts."""
 
     name = "Edge Inner Product"
 
-    meshSizes = [4, 8, 16, 32]
-
     def getError(self):
 
         call = lambda fun, xyz: fun(xyz[:, 0], xyz[:, 1], xyz[:, 2])