/*

 * This program 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 3 of the License, or

 * (at your option) any later version.

 *

 * This program 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 this program; if not, see <http://www.gnu.org/licenses/>.

 *

 * Copyright (C) 2011 Jon Nordby <jononor@gmail.com>

 */

/* Test saving/serialization of graphs to XML

 */

#include <glib.h>

#include <gegl.h>

#include "common.c"

/* Saving an empty graph should result in a valid UTF-8 encoded XML document,

 * with the same basic structure as if the graph was non-empty.

 *

 * Kind-of a sanity test, should run before other tests. */

static void

test_save_empty_graph (void)

{

    const gchar * const expected_result = "\n<gegl>\n</gegl>\n";

    GeglNode *graph;

    gchar *xml;

    graph = gegl_node_new();

    xml = gegl_node_to_xml(graph, "");

    assert_equivalent_xml(xml, expected_result);

    g_object_unref(graph);

    g_free(xml);

}

/* gegl:nop nodes should be discarded when saving the graph */

static void

test_save_nop_nodes (void)

{

    const gchar * const expected_result = "\n<gegl>\n</gegl>\n";

    GeglNode *graph, *op1, *op2;

    gchar *xml;

    graph = gegl_node_new();

    op1 = gegl_node_new_child(graph, "operation", "gegl:nop", NULL);

    op2 = gegl_node_new_child(graph, "operation", "gegl:nop", NULL);

    gegl_node_link_many(op1, op2, NULL);

    xml = gegl_node_to_xml(op2, "");

    assert_equivalent_xml(xml, expected_result);

    g_object_unref(graph);

    g_free(xml);

}

/* Saving a graph with multiple nodes

 *

 * Note: Relies on the number and names of properties of the used operations to not change */

static void

test_save_multiple_nodes (void)

{

    const gchar * const expected_result = \

"\n\

<gegl>\n\

  <node operation='gegl:invert'>\n\

  </node>\n\

  <node operation='gegl:crop'>\n\

      <params>\n\

        <param name='x'>0</param>\n\

        <param name='y'>0</param>\n\

        <param name='width'>0</param>\n\

        <param name='height'>0</param>\n\

      </params>\n\

  </node>\n\

</gegl>\n";

    GeglNode *graph, *op1, *op2;

    gchar *xml;

    graph = gegl_node_new();

    op1 = gegl_node_new_child(graph, "operation", "gegl:crop",

                              "x", 0.0, "y", 0.0,

                              "width", 0.0, "height", 0.0,

                              NULL);

    op2 = gegl_node_new_child(graph, "operation", "gegl:invert", NULL);

    gegl_node_link_many(op1, op2, NULL);

    xml = gegl_node_to_xml(op2, "");

    assert_equivalent_xml(xml, expected_result);

    g_object_unref(graph);

    g_free(xml);

}

/* Test that saving a subgraph works */

static void

test_save_toplevel_graph (void)

{

    const gchar * const expected_result = \

"\n\

<gegl>\n\

  <node operation='gegl:invert'>\n\

  </node>\n\

  <node operation='gegl:crop'>\n\

      <params>\n\

        <param name='x'>0</param>\n\

        <param name='y'>0</param>\n\

        <param name='width'>0</param>\n\

        <param name='height'>0</param>\n\

      </params>\n\

  </node>\n\

</gegl>\n";

    GeglNode *graph, *op1, *op2;

    gchar *xml;

    graph = gegl_node_new();

    op1 = gegl_node_new_child(graph, "operation", "gegl:crop",

                              "x", 0.0, "y", 0.0,

                              "width", 0.0, "height", 0.0,

                              NULL);

    op2 = gegl_node_new_child(graph, "operation", "gegl:invert", NULL);

    gegl_node_link_many(op1, op2, NULL);

    xml = gegl_node_to_xml(graph, "");

    assert_equivalent_xml(xml, expected_result);

    g_object_unref(graph);

    g_free(xml);

}

int

main (int argc, char *argv[])

{

    int result = -1;

    gegl_init(&argc, &argv);

    g_test_init(&argc, &argv, NULL);

    g_test_add_func("/xml/save/empty_graph", test_save_empty_graph);

    g_test_add_func("/xml/save/only_nop_nodes", test_save_nop_nodes);

    g_test_add_func("/xml/save/multiple_nodes", test_save_multiple_nodes);

    /* Expected failure

    g_test_add_func("/xml/save/toplevel_graph", test_save_toplevel_graph);

    */

    result = g_test_run();

    gegl_exit();

    return result;

}