--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-color.c	Tue Jan 07 21:16:00 2020 +0100
@@ -0,0 +1,80 @@
+/*
+ * test-color.c -- test color routines
+ *
+ * Copyright (c) 2020 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <greatest.h>
+
+#include <color.h>
+
+TEST
+red(void)
+{
+	ASSERT_EQ(163, COLOR_R(0xa3000000));
+	PASS();
+}
+
+TEST
+green(void)
+{
+	ASSERT_EQ(19, COLOR_G(0x00130000));
+	PASS();
+}
+
+TEST
+blue(void)
+{
+	ASSERT_EQ(238, COLOR_B(0x0000ee00));
+	PASS();
+}
+
+TEST
+alpha(void)
+{
+	ASSERT_EQ(255, COLOR_A(0x000000ff));
+	PASS();
+}
+
+TEST
+simple(void)
+{
+	ASSERT_EQ(0xaabbccee, COLOR_HEX(170, 187, 204, 238));
+	PASS();
+}
+
+SUITE(hex_to_rgb)
+{
+	RUN_TEST(red);
+	RUN_TEST(green);
+	RUN_TEST(blue);
+	RUN_TEST(alpha);
+}
+
+SUITE(rgb_to_hex)
+{
+	RUN_TEST(simple);
+}
+
+GREATEST_MAIN_DEFS();
+
+int
+main(int argc, char **argv)
+{
+	GREATEST_MAIN_BEGIN();
+	RUN_SUITE(hex_to_rgb);
+	RUN_SUITE(rgb_to_hex);
+	GREATEST_MAIN_END();
+}