--- /dev/null	2015-09-11 11:06:08.592686920 -0400
+++ new/modules/graphics/src/test/java/test/com/sun/javafx/geom/Vec3dTest.java	2015-09-11 21:23:56.781287300 -0400
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package test.com.sun.javafx.geom;
+
+import com.sun.javafx.geom.Vec3d;
+import com.sun.javafx.geom.Vec3f;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * PRELIMINARY unit tests for Vec3d.
+ *
+ * TODO: expand this to cover the entire class (RT-26882)
+ */
+public class Vec3dTest {
+
+    private static double EPSILON = 1e-10;
+
+    @Test
+    public void testDefaultContructor() {
+        Vec3d v3d = new Vec3d();
+        assertEquals(0, v3d.x, 0);
+        assertEquals(0, v3d.y, 0);
+        assertEquals(0, v3d.z, 0);
+    }
+
+    @Test
+    public void testContructor1() {
+        Vec3d v3d = new Vec3d(1.0, 2.0, 3.0);
+        assertEquals(1, v3d.x, 0);
+        assertEquals(2, v3d.y, 0);
+        assertEquals(3, v3d.z, 0);
+    }
+
+    @Test
+    public void testContructor2() {
+        Vec3f v3f = new Vec3f(1f, 2f, 3f);
+        Vec3d v3d = new Vec3d(v3f);
+        assertEquals(1, v3d.x, 0);
+        assertEquals(2, v3d.y, 0);
+        assertEquals(3, v3d.z, 0);
+    }
+
+    @Test
+    public void testLength() {
+        Vec3d v3d = new Vec3d();
+        double len = v3d.length();
+        assertEquals(0, len, 0);
+
+        v3d = new Vec3d(1, 2, 3);
+        len = v3d.length();
+        assertEquals(Math.sqrt(14.0), len, EPSILON);
+
+        v3d = new Vec3d(-1, 2, 3);
+        len = v3d.length();
+        assertEquals(Math.sqrt(14.0), len, EPSILON);
+
+        v3d = new Vec3d(1, -0.2, -0.03);
+        len = v3d.length();
+        assertEquals(Math.sqrt(1.0409), len, EPSILON);
+
+        v3d = new Vec3d(-0.1, -0.2, -0.3);
+        len = v3d.length();
+        assertEquals(Math.sqrt(0.14), len, EPSILON);
+    }
+
+}