[gegl] tests: Test serialization of a graph segment

[Debarshi Ray <debarshir src gnome org>]

commit 1e5e68ca635915495d1aa99757f4b664f5cb44c9
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Jan 18 14:59:26 2016 +0100

    tests: Test serialization of a graph segment
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760784

 tests/xml/test-save.c |   93 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 93 insertions(+), 0 deletions(-)
---
diff --git a/tests/xml/test-save.c b/tests/xml/test-save.c
index 770e457..d2dfb9d 100644
--- a/tests/xml/test-save.c
+++ b/tests/xml/test-save.c
@@ -13,6 +13,7 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  *
  * Copyright (C) 2011 Jon Nordby <jononor gmail com>
+ * Copyright (C) 2016 Red Hat, Inc.
  */
 
 /* Test saving/serialization of graphs to XML
@@ -174,6 +175,96 @@ test_save_toplevel_graph (void)
     g_free(xml);
 }
 
+/* Test that saving a segment works */
+static void
+test_save_segment (void)
+{
+    const gchar * const expected_result = \
+"<?xml version='1.0' encoding='UTF-8'?>\n\
+<gegl>\n\
+  <node operation='gegl:invert-linear'>\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\
+        <param name='reset-origin'>false</param>\n\
+      </params>\n\
+  </node>\n\
+</gegl>\n";
+
+    GeglNode *graph, *op1, *op2, *src;
+    gchar *xml;
+
+    graph = gegl_node_new();
+    src = gegl_node_new_child(graph, "operation", "gegl:checkerboard", NULL);
+    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-linear", NULL);
+    gegl_node_link_many(src, op1, op2, NULL);
+
+    xml = gegl_node_to_xml_full(op2, op1, "");
+
+    assert_equivalent_xml(xml, expected_result);
+
+    g_object_unref(graph);
+    g_free(xml);
+}
+
+/* Test that saving a segment that is a subgraph works */
+static void
+test_save_segment_subgraph (void)
+{
+    const gchar * const expected_result = \
+"<?xml version='1.0' encoding='UTF-8'?>\n\
+<gegl>\n\
+  <node operation='gegl:invert-linear'>\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\
+        <param name='reset-origin'>false</param>\n\
+      </params>\n\
+  </node>\n\
+</gegl>\n";
+
+    GeglNode *graph, *src, *subgraph;
+    GeglNode *input, *op1, *op2, *output;
+    gchar *xml;
+
+    graph = gegl_node_new();
+    src = gegl_node_new_child(graph, "operation", "gegl:checkerboard", NULL);
+
+    subgraph = gegl_node_new();
+    gegl_node_add_child(graph, subgraph);
+    g_object_unref(subgraph);
+
+    input = gegl_node_get_input_proxy(subgraph, "input");
+    output = gegl_node_get_output_proxy(subgraph, "output");
+    op1 = gegl_node_new_child(subgraph, "operation", "gegl:crop",
+                              "x", 0.0, "y", 0.0,
+                              "width", 0.0, "height", 0.0,
+                              NULL);
+    op2 = gegl_node_new_child(subgraph, "operation", "gegl:invert-linear", NULL);
+
+    gegl_node_link_many(src, subgraph, NULL);
+    gegl_node_link_many(input, op1, op2, output, NULL);
+
+    xml = gegl_node_to_xml_full(subgraph, subgraph, "");
+
+    assert_equivalent_xml(xml, expected_result);
+
+    g_object_unref(graph);
+    g_free(xml);
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -188,6 +279,8 @@ main (int argc, char *argv[])
     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);
     g_test_add_func("/xml/save/toplevel_graph", test_save_toplevel_graph);
+    g_test_add_func("/xml/save/segment", test_save_segment);
+    g_test_add_func("/xml/save/segment_subgraph", test_save_segment_subgraph);
 
     result = g_test_run();
     gegl_exit();