message: Compare RHS vectors in assembly level unit test
diff: @@ -412,15 +412,18 @@ TEST_CASE("Parallel H1 Full Assembly", "[AssemblyLevel], [Parallel], [CUDA]")
  ParGridFunction x(&fespace);
  ParLinearForm b(&fespace);
  - x = 0.0;
  - b = 0.0;
  + x.Randomize(1);
  + b.Randomize(2);
  - Vector X, B;
  + Vector X, B1, B2;
  - a_fa.FormLinearSystem(ess_tdof_list, x, b, A_fa, X, B);
  - a_legacy.FormLinearSystem(ess_tdof_list, x, b, A_legacy, X, B);
  + a_fa.FormLinearSystem(ess_tdof_list, x, b, A_fa, X, B1);
  + a_legacy.FormLinearSystem(ess_tdof_list, x, b, A_legacy, X, B2);
  TestSameHypreMatrices(A_fa, A_legacy);
  +
  + B1 -= B2;
  + REQUIRE(B1.Normlinf() == MFEM_Approx(0.0));
  }
  #endif
  