Index: uspace/lib/gfx/test/coord.c
===================================================================
--- uspace/lib/gfx/test/coord.c	(revision 648e2ac6aebff5e36eb48bb2c7ca718acb14c18a)
+++ uspace/lib/gfx/test/coord.c	(revision 648e2ac6aebff5e36eb48bb2c7ca718acb14c18a)
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2019 Jiri Svoboda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <gfx/coord.h>
+#include <pcut/pcut.h>
+
+PCUT_INIT;
+
+PCUT_TEST_SUITE(coord);
+
+extern void gfx_coord2_add(gfx_coord2_t *, gfx_coord2_t *, gfx_coord2_t *);
+extern void gfx_coord2_subtract(gfx_coord2_t *, gfx_coord2_t *, gfx_coord2_t *);
+extern void gfx_rect_translate(gfx_coord2_t *, gfx_rect_t *, gfx_rect_t *);
+
+/** gfx_coord2_add should add two coordinate vectors */
+PCUT_TEST(coord2_add)
+{
+	gfx_coord2_t a, b;
+	gfx_coord2_t d;
+
+	a.x = 10;
+	a.y = 11;
+	b.x = 20;
+	b.y = 22;
+
+	gfx_coord2_add(&a, &b, &d);
+
+	PCUT_ASSERT_EQUALS(a.x + b.x, d.x);
+	PCUT_ASSERT_EQUALS(a.y + b.y, d.y);
+}
+
+/** gfx_coord2_subtract should subtract two coordinate vectors */
+PCUT_TEST(coord2_subtract)
+{
+	gfx_coord2_t a, b;
+	gfx_coord2_t d;
+
+	a.x = 10;
+	a.y = 11;
+	b.x = 20;
+	b.y = 22;
+
+	gfx_coord2_subtract(&a, &b, &d);
+
+	PCUT_ASSERT_EQUALS(a.x - b.x, d.x);
+	PCUT_ASSERT_EQUALS(a.y - b.y, d.y);
+}
+
+/** gfx_rect_translate should translate rectangle */
+PCUT_TEST(rect_translate)
+{
+	gfx_coord2_t offs;
+	gfx_rect_t srect;
+	gfx_rect_t drect;
+
+	offs.x = 5;
+	offs.y = 6;
+
+	srect.p0.x = 10;
+	srect.p0.y = 11;
+	srect.p1.x = 20;
+	srect.p1.y = 22;
+
+	gfx_rect_translate(&offs, &srect, &drect);
+
+	PCUT_ASSERT_EQUALS(offs.x + srect.p0.x, drect.p0.x);
+	PCUT_ASSERT_EQUALS(offs.y + srect.p0.y, drect.p0.y);
+	PCUT_ASSERT_EQUALS(offs.x + srect.p1.x, drect.p1.x);
+	PCUT_ASSERT_EQUALS(offs.y + srect.p1.y, drect.p1.y);
+}
+
+PCUT_EXPORT(coord);
Index: uspace/lib/gfx/test/main.c
===================================================================
--- uspace/lib/gfx/test/main.c	(revision dcc4cb3152f122ace8fc51e1d0531a67547d1b8d)
+++ uspace/lib/gfx/test/main.c	(revision 648e2ac6aebff5e36eb48bb2c7ca718acb14c18a)
@@ -33,4 +33,5 @@
 PCUT_IMPORT(bitmap);
 PCUT_IMPORT(color);
+PCUT_IMPORT(coord);
 PCUT_IMPORT(render);