message: Set diagonal policy in `test_assembly_levels`.
diff: @@ -413,6 +413,7 @@ TEST_CASE("Serial H1 Full Assembly", "[AssemblyLevel], [CUDA]")
  a_fa.AddDomainIntegrator(new DiffusionIntegrator);
  a_legacy.AddDomainIntegrator(new DiffusionIntegrator);
  + a_fa.SetDiagonalPolicy(Operator::DIAG_ONE);
  a_fa.Assemble();
  a_legacy.SetDiagonalPolicy(Operator::DIAG_ONE);
  @@ -473,7 +474,9 @@ TEST_CASE("Parallel H1 Full Assembly", "[AssemblyLevel], [Parallel], [CUDA]")
  ParBilinearForm a_legacy(&fespace);
  a_fa.SetAssemblyLevel(AssemblyLevel::FULL);
  + a_fa.SetDiagonalPolicy(Operator::DIAG_ONE);
  a_legacy.SetAssemblyLevel(AssemblyLevel::LEGACY);
  + a_legacy.SetDiagonalPolicy(Operator::DIAG_ONE);
  a_fa.AddDomainIntegrator(new DiffusionIntegrator);
  a_legacy.AddDomainIntegrator(new DiffusionIntegrator);
  