[gegl] tests: Add initial unit tests for GeglColor

[Jon Nordby <jonnor src gnome org>]

commit 194f131d36894a035fec02c9572e38b1a77dec65
Author: Jon Nordby <jononor gmail com>
Date:   Wed Aug 6 16:02:58 2014 +0200

    tests: Add initial unit tests for GeglColor

 tests/simple/Makefile.am       |    1 +
 tests/simple/test-gegl-color.c |   72 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 0 deletions(-)
---
diff --git a/tests/simple/Makefile.am b/tests/simple/Makefile.am
index 2f8d2cd..c9e47ff 100644
--- a/tests/simple/Makefile.am
+++ b/tests/simple/Makefile.am
@@ -11,6 +11,7 @@ noinst_PROGRAMS =                     \
        test-empty-tile                 \
        test-format-sensing             \
        test-gegl-rectangle             \
+       test-gegl-color             \
        test-gegl-tile                  \
        test-image-compare              \
        test-license-check              \
diff --git a/tests/simple/test-gegl-color.c b/tests/simple/test-gegl-color.c
new file mode 100644
index 0000000..cbafc71
--- /dev/null
+++ b/tests/simple/test-gegl-color.c
@@ -0,0 +1,72 @@
+/*
+ * 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) 2014 Jon Nordby <jononor gmail com>
+ */
+
+/* Test GeglColor */
+
+#include <glib.h>
+#include <gegl.h>
+
+#define TP_ROUNDTRIP "/GeglColor/rgba_set_get/"
+
+typedef struct _TestRgbaSetGetData {
+    gchar *casename;
+    gdouble rgba[4];
+} TestRgbaSetGetData;
+
+static TestRgbaSetGetData roundtrip_cases[] = {
+    { TP_ROUNDTRIP"all_components_zero", { 0., 0., 0., 0. } },
+    { TP_ROUNDTRIP"all_components_one", { 1., 1., 1., 1. } },
+    { TP_ROUNDTRIP"mixed_components", { 0.3, 0.1, 0.5, 0.7 } }
+};
+
+static void
+test_rgba_setget_roundtrip(const TestRgbaSetGetData *data)
+{
+    GeglColor *color = gegl_color_new(NULL);
+    gdouble out[4] = { -1, -1, -1, -1 };
+    gdouble in[4] = { data->rgba[0], data->rgba[1], data->rgba[2], data->rgba[3] } ;
+
+    gegl_color_set_rgba(color, in[0], in[1], in[2], in[3]);
+    gegl_color_get_rgba(color, &out[0], &out[1], &out[2], &out[3]);
+
+    g_assert_cmpfloat((float)in[0], ==, (float)out[0]);
+    g_assert_cmpfloat((float)in[1], ==, (float)out[1]);
+    g_assert_cmpfloat((float)in[2], ==, (float)out[2]);
+    g_assert_cmpfloat((float)in[3], ==, (float)out[3]);
+
+    g_object_unref(color);
+}
+
+
+int
+main (int argc, char *argv[])
+{
+    int result = -1;
+    gegl_init(&argc, &argv);
+
+    g_test_init(&argc, &argv, NULL);
+
+    // set/get roundtrip tests
+    for (int i = 0; i < G_N_ELEMENTS(roundtrip_cases); i++) {
+        TestRgbaSetGetData *data = &roundtrip_cases[i];
+        g_test_add_data_func(data->casename, data, (GTestDataFunc)test_rgba_setget_roundtrip);
+    }
+
+    result = g_test_run();
+    gegl_exit();
+    return result;
+}