[gnome-photos/wip/rishi/unit-tests-gegl] tests: Test the GEGL utilities

[Debarshi Ray <debarshir src gnome org>]

commit 0aee2d9b7f3c9608b134582680081fd3f0b1d7a7
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Nov 16 08:51:09 2018 +0100

    tests: Test the GEGL utilities

 tests/unit/Makefile.am        |  18 ++++
 tests/unit/meson.build        |   3 +
 tests/unit/photos-test-gegl.c | 241 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 262 insertions(+)
---
diff --git a/tests/unit/Makefile.am b/tests/unit/Makefile.am
index f4278c31..c180591e 100644
--- a/tests/unit/Makefile.am
+++ b/tests/unit/Makefile.am
@@ -10,9 +10,27 @@ dist_test_data = \
        $(NULL)
 
 test_programs = \
+       photos-test-gegl \
        photos-test-pipeline \
        $(NULL)
 
+photos_test_gegl_CPPFLAGS = \
+       $(GDK_PIXBUF_CFLAGS) \
+       $(GEGL_CFLAGS) \
+       $(GIO_CFLAGS) \
+       $(GLIB_CFLAGS) \
+       -I$(top_builddir)/src \
+       -I$(top_srcdir)/src \
+       $(NULL)
+
+photos_test_gegl_LDADD = \
+       $(GDK_PIXBUF_LIBS) \
+       $(GEGL_LIBS) \
+       $(GIO_LIBS) \
+       $(GLIB_LIBS) \
+       $(top_builddir)/src/libgnome-photos.la \
+       $(NULL)
+
 photos_test_pipeline_CPPFLAGS = \
        $(GDK_PIXBUF_CFLAGS) \
        $(GEGL_CFLAGS) \
diff --git a/tests/unit/meson.build b/tests/unit/meson.build
index b1b3f4f4..623fbe55 100644
--- a/tests/unit/meson.build
+++ b/tests/unit/meson.build
@@ -12,6 +12,9 @@ test_env.set('MALLOC_CHECK_', '2')
 test_env.set('MALLOC_PERTURB_', '@0@'.format(random_number % 256))
 
 tests = {
+  'photos-test-gegl': {
+    'dependencies': [gdk_pixbuf_dep, gegl_dep, gio_dep, gio_unix_dep, glib_dep, libgnome_photos_dep]
+  },
   'photos-test-pipeline': {
     'dependencies': [gdk_pixbuf_dep, gegl_dep, gio_dep, gio_unix_dep, glib_dep, libgnome_photos_dep]
   },
diff --git a/tests/unit/photos-test-gegl.c b/tests/unit/photos-test-gegl.c
new file mode 100644
index 00000000..f160f1c4
--- /dev/null
+++ b/tests/unit/photos-test-gegl.c
@@ -0,0 +1,241 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2018 Red Hat, Inc.
+ *
+ * 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/>.
+ */
+
+
+#include "config.h"
+
+#include <locale.h>
+
+#include <gegl.h>
+#include <glib.h>
+
+#include "photos-debug.h"
+#include "photos-gegl.h"
+#include "photos-quarks.h"
+
+
+typedef struct _PhotosTestGeglFixture PhotosTestGeglFixture;
+
+struct _PhotosTestGeglFixture
+{
+  GFile *destination;
+  GFile *source;
+  GeglBuffer *buffer;
+};
+
+
+static void
+photos_test_gegl_buffer_save_to_file (GeglBuffer *buffer, GFile *file)
+{
+  GeglNode *buffer_source;
+  GeglNode *png_save;
+  g_autoptr (GeglNode) graph = NULL;
+  g_autofree gchar *path = NULL;
+
+  g_assert_true (GEGL_IS_BUFFER (buffer));
+  g_assert_true (G_IS_FILE (file));
+
+  graph = gegl_node_new ();
+  buffer_source = gegl_node_new_child (graph, "operation", "gegl:buffer-source", "buffer", buffer, NULL);
+
+  path = g_file_get_path (file);
+  png_save = gegl_node_new_child (graph, "operation", "gegl:png-save", "bitdepth", 8, "path", path, NULL);
+
+  gegl_node_link (buffer_source, png_save);
+  gegl_node_process (png_save);
+}
+
+
+static void
+photos_test_gegl_setup (PhotosTestGeglFixture *fixture, gconstpointer user_data)
+{
+  const Babl *format;
+  g_autoptr (GeglBuffer) buffer = NULL;
+  GeglColor *checkerboard_color1 = NULL; /* TODO: use g_autoptr */
+  GeglColor *checkerboard_color2 = NULL; /* TODO: use g_autoptr */
+  GeglColor *path_fill = NULL; /* TODO: use g_autoptr */
+  GeglColor *path_stroke = NULL; /* TODO: use g_autoptr */
+  GeglNode *buffer_sink;
+  GeglNode *checkerboard;
+  GeglNode *convert_format;
+  GeglNode *crop;
+  GeglNode *over;
+  GeglNode *path;
+  GeglNode *translate;
+  g_autoptr (GeglNode) graph = NULL;
+  GeglPath *path_d = NULL; /* TODO: use g_autoptr */
+  gboolean even_dimensions = GPOINTER_TO_INT (user_data);
+  gdouble crop_dimension;
+
+  {
+    g_autoptr (GError) error = NULL;
+    g_autoptr (GFileIOStream) iostream = NULL;
+
+    fixture->destination = g_file_new_tmp (PACKAGE_TARNAME "-destination-XXXXXX.png", &iostream, &error);
+    g_assert_no_error (error);
+  }
+
+  {
+    g_autoptr (GError) error = NULL;
+    g_autoptr (GFileIOStream) iostream = NULL;
+
+    fixture->source = g_file_new_tmp (PACKAGE_TARNAME "-source-XXXXXX.png", &iostream, &error);
+    g_assert_no_error (error);
+  }
+
+  graph = gegl_node_new ();
+
+  checkerboard_color1 = gegl_color_new ("rgb(0.25, 0.25, 0.25)");
+  checkerboard_color2 = gegl_color_new ("rgb(0.75, 0.75, 0.75)");
+  checkerboard = gegl_node_new_child (graph,
+                                      "operation", "gegl:checkerboard",
+                                      "color1", checkerboard_color1,
+                                      "color2", checkerboard_color2,
+                                      "x", 5,
+                                      "y", 5,
+                                      NULL);
+
+  crop_dimension = even_dimensions ? 200.0 : 195;
+  crop = gegl_node_new_child (graph,
+                              "operation", "gegl:crop",
+                              "height", crop_dimension,
+                              "width", crop_dimension,
+                              NULL);
+
+  path_d = gegl_path_new_from_string ("M0,50 "
+                                      "C0,78 24,100 50,100 "
+                                      "C77,100 100,78 100,50 "
+                                      "C100,45 99,40 98,35 "
+                                      "C82,35 66,35 50,35 "
+                                      "C42,35 35,42 35,50 "
+                                      "C35,58 42,65 50,65 "
+                                      "C56,65 61,61 64,56 "
+                                      "C67,51 75,55 73,60 "
+                                      "C69,69 60,75 50,75 "
+                                      "C36,75 25,64 25,50 "
+                                      "C25,36 36,25 50,25 "
+                                      "L93,25 "
+                                      "C83,9 67,0 49,0 "
+                                      "C25,0 0,20 0,50 "
+                                      "z");
+  path_fill = gegl_color_new ("rgb(0.0, 0.6, 1.0)");
+  path_stroke = gegl_color_new ("rgb(0.0, 0.6, 1.0)");
+  path = gegl_node_new_child (graph,
+                              "operation", "gegl:path",
+                              "d", path_d,
+                              "fill", path_fill,
+                              "stroke", path_stroke,
+                              "stroke-hardness", 1.0,
+                              "stroke-width", 2.0,
+                              NULL);
+
+  translate = gegl_node_new_child (graph, "operation", "gegl:translate", "x", 40.0, "y", 40.0, NULL);
+
+  over = gegl_node_new_child (graph, "operation", "svg:src-over", NULL);
+
+  format = babl_format ("R'G'B'A u8");
+  convert_format = gegl_node_new_child (graph, "operation", "gegl:convert-format", "format", format, NULL);
+
+  buffer_sink = gegl_node_new_child (graph, "operation", "gegl:buffer-sink", "buffer", &buffer, NULL);
+
+  gegl_node_link (path, translate);
+  gegl_node_connect_to (translate, "output", over, "aux");
+  gegl_node_link_many (checkerboard, crop, over, convert_format, buffer_sink, NULL);
+  gegl_node_process (buffer_sink);
+
+  fixture->buffer = g_object_ref (buffer);
+  photos_test_gegl_buffer_save_to_file (fixture->buffer, fixture->source);
+
+  g_object_unref (checkerboard_color1);
+  g_object_unref (checkerboard_color2);
+  g_object_unref (path_fill);
+  g_object_unref (path_stroke);
+  g_object_unref (path_d);
+}
+
+
+static void
+photos_test_gegl_teardown (PhotosTestGeglFixture *fixture, gconstpointer user_data)
+{
+  g_object_unref (fixture->buffer);
+
+  g_file_delete (fixture->destination, NULL, NULL);
+  g_object_unref (fixture->destination);
+
+  g_file_delete (fixture->source, NULL, NULL);
+  g_object_unref (fixture->source);
+}
+
+
+static void
+photos_test_gegl_buffer_apply_orientation_bottom_0 (PhotosTestGeglFixture *fixture, gconstpointer user_data)
+{
+  g_autoptr (GeglBuffer) buffer_oriented = NULL;
+  g_autofree gchar *checksum = NULL;
+
+  buffer_oriented = photos_gegl_buffer_apply_orientation (fixture->buffer, PHOTOS_ORIENTATION_BOTTOM);
+  photos_test_gegl_buffer_save_to_file (buffer_oriented, fixture->destination);
+  checksum = photos_gegl_compute_checksum_for_buffer (G_CHECKSUM_SHA256, buffer_oriented);
+  g_assert_cmpstr (checksum, ==, "0497b2a1ff9aa9f6e7aa526b55157133d01331a0869602a4d4cc1f7a7bef420e");
+}
+
+
+static void
+photos_test_gegl_buffer_apply_orientation_bottom_1 (PhotosTestGeglFixture *fixture, gconstpointer user_data)
+{
+  g_autoptr (GeglBuffer) buffer_oriented = NULL;
+  g_autofree gchar *checksum = NULL;
+
+  buffer_oriented = photos_gegl_buffer_apply_orientation (fixture->buffer, PHOTOS_ORIENTATION_BOTTOM);
+  photos_test_gegl_buffer_save_to_file (buffer_oriented, fixture->destination);
+  checksum = photos_gegl_compute_checksum_for_buffer (G_CHECKSUM_SHA256, buffer_oriented);
+  g_assert_cmpstr (checksum, ==, "3d48c4f33015c4d0a0cbb9d360d3d2e9b76469ea103fc848fe87e2c924e9fac6");
+}
+
+
+gint
+main (gint argc, gchar *argv[])
+{
+  gint exit_status;
+
+  setlocale (LC_ALL, "");
+  g_setenv ("GEGL_THREADS", "1", FALSE);
+  g_test_init (&argc, &argv, NULL);
+  photos_debug_init ();
+  photos_gegl_init ();
+  photos_gegl_ensure_builtins ();
+
+  g_test_add ("/gegl/buffer/apply_orientation/bottom-0",
+              PhotosTestGeglFixture,
+              GINT_TO_POINTER (TRUE),
+              photos_test_gegl_setup,
+              photos_test_gegl_buffer_apply_orientation_bottom_0,
+              photos_test_gegl_teardown);
+
+  g_test_add ("/gegl/buffer/apply_orientation/bottom-1",
+              PhotosTestGeglFixture,
+              GINT_TO_POINTER (FALSE),
+              photos_test_gegl_setup,
+              photos_test_gegl_buffer_apply_orientation_bottom_1,
+              photos_test_gegl_teardown);
+
+  exit_status = g_test_run ();
+
+  gegl_exit ();
+  return exit_status;
+}