Unit tests for Lagrange Pyramid18

Author: roystgnr

tests/fe/fe_lagrange_test.C

@@ -38,4 +38,5 @@ INSTANTIATE_FETEST(THIRD, LAGRANGE, PRISM21);
 INSTANTIATE_FETEST(FIRST, LAGRANGE, PYRAMID5);
 INSTANTIATE_FETEST(SECOND, LAGRANGE, PYRAMID13);
 INSTANTIATE_FETEST(SECOND, LAGRANGE, PYRAMID14);
+INSTANTIATE_FETEST(THIRD, LAGRANGE, PYRAMID18);
 #endif

tests/fe/fe_test.h

@@ -254,7 +254,8 @@ Gradient rational_test_grad (const Point& p,
 #define FE_CAN_TEST_CUBIC \
   (((family != LAGRANGE && family != L2_LAGRANGE) || \
     (elem_type != TRI7 && elem_type != TET14 && \
-     elem_type != PRISM20 && elem_type != PRISM21)) && order > 2)
+     elem_type != PRISM20 && elem_type != PRISM21 && \
+     elem_type != PYRAMID18)) && order > 2)
 
 
 template <Order order, FEFamily family, ElemType elem_type, unsigned int build_nx>