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DLR-AMR
GitHub Repository: DLR-AMR/t8code
Path: blob/main/test/t8_gtest_vtk_linkage.cxx
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/*
  This file is part of t8code.
  t8code is a C library to manage a collection (a forest) of multiple
  connected adaptive space-trees of general element types in parallel.

  Copyright (C) 2015 the developers

  t8code is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  t8code is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with t8code; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/* In this test we create a vtk unstructured Grid object and check whether
 * vtk version t8code was configured to link with is the version that is actually
 * linked.
 * The purpose of this test is to check whether t8code successfully links
 * against vtk.
 * If t8code was not compiled with -DT8CODE_ENABLE_VTK=ON then this test
 * does nothing and is always passed.
 */
#include <gtest/gtest.h>
#include <t8.h>
#if T8_ENABLE_VTK
#include <vtkUnstructuredGrid.h>
#include <vtkVersionMacros.h>
#include <vtkNew.h>
#endif

/* Test correct macro dependencies.
 * Will throw a compile time error if T8_VTK_VERSION_USED
 * is defined but T8_ENABLE_VTK is not. */
#ifndef T8_ENABLE_VTK
#ifdef T8_VTK_VERSION_USED
#error Configuration error: T8_VTK_VERSION_USED is defined despite \
 T8_ENABLE_VTK not being defined.
#endif
#endif

/* Check whether T8_VTK_VERSION_USED equals VTK_MAJOR_VERSION.VTK_MINOR_VERSION */
TEST (t8_gtest_vtk_linkage, t8_test_vtk_version_number)
{
#if T8_ENABLE_VTK
  char vtk_version[BUFSIZ];
  snprintf (vtk_version, BUFSIZ, "%i.%i", VTK_MAJOR_VERSION, VTK_MINOR_VERSION);
  ASSERT_FALSE (strcmp (T8_VTK_VERSION_USED, vtk_version))
    << "linked vtk version (" << vtk_version << ") does not equal the version t8code was configured with ("
    << T8_VTK_VERSION_USED << ").\n";
  if (!strcmp (T8_VTK_VERSION_USED, vtk_version)) {
    t8_debugf ("Using vtk version %s.\n", vtk_version);
  }
#endif
}

/* Check whether we can successfully execute VTK code */
TEST (t8_gtest_vtk_linkage, t8_test_vtk_linkage)
{
#if T8_ENABLE_VTK
  vtkNew<vtkUnstructuredGrid> unstructuredGrid;

  t8_debugf ("Successfully created VTK unstructuredGrid object.\n");
#else
  t8_debugf ("This version of t8code is not compiled with vtk support.\n");
#endif
}