--- /dev/null	2019-12-04 18:44:18.020007537 +0000
+++ new/test/jdk/java/foreign/TestArrays.java	2019-12-09 18:15:46.324297398 +0000
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2019, 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.
+ *
+ *  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.
+ *
+ */
+
+/*
+ * @test
+ * @run testng TestArrays
+ */
+
+import jdk.incubator.foreign.MemoryAddress;
+import jdk.incubator.foreign.MemoryLayout;
+import jdk.incubator.foreign.MemoryLayout.PathElement;
+import jdk.incubator.foreign.MemoryLayouts;
+import jdk.incubator.foreign.MemorySegment;
+import jdk.incubator.foreign.SequenceLayout;
+
+import java.lang.invoke.VarHandle;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+
+import org.testng.annotations.*;
+import static org.testng.Assert.*;
+
+public class TestArrays {
+
+    static SequenceLayout bytes = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_BYTE
+    );
+
+    static SequenceLayout chars = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_CHAR
+    );
+
+    static SequenceLayout shorts = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_SHORT
+    );
+
+    static SequenceLayout ints = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_INT
+    );
+
+    static SequenceLayout floats = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_FLOAT
+    );
+
+    static SequenceLayout longs = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_LONG
+    );
+
+    static SequenceLayout doubles = MemoryLayout.ofSequence(100,
+            MemoryLayouts.JAVA_DOUBLE
+    );
+
+    static VarHandle byteHandle = bytes.varHandle(byte.class, PathElement.sequenceElement());
+    static VarHandle charHandle = chars.varHandle(char.class, PathElement.sequenceElement());
+    static VarHandle shortHandle = shorts.varHandle(short.class, PathElement.sequenceElement());
+    static VarHandle intHandle = ints.varHandle(int.class, PathElement.sequenceElement());
+    static VarHandle floatHandle = floats.varHandle(float.class, PathElement.sequenceElement());
+    static VarHandle longHandle = doubles.varHandle(long.class, PathElement.sequenceElement());
+    static VarHandle doubleHandle = longs.varHandle(double.class, PathElement.sequenceElement());
+
+    static void initBytes(MemoryAddress base, SequenceLayout seq, BiConsumer<MemoryAddress, Long> handleSetter) {
+        for (long i = 0; i < seq.elementCount().getAsLong() ; i++) {
+            handleSetter.accept(base, i);
+        }
+    }
+
+    static void checkBytes(MemoryAddress base, SequenceLayout layout) {
+        long nBytes = layout.elementCount().getAsLong() * layout.elementLayout().byteSize();
+        byte[] arr = base.segment().toByteArray();
+        for (long i = 0 ; i < nBytes ; i++) {
+            byte expected = (byte)byteHandle.get(base, i);
+            byte found = arr[(int)i];
+            assertEquals(expected, found);
+        }
+    }
+
+    @Test(dataProvider = "arrays")
+    public void testArrays(Consumer<MemoryAddress> init, SequenceLayout layout) {
+        try (MemorySegment segment = MemorySegment.allocateNative(layout)) {
+            init.accept(segment.baseAddress());
+            checkBytes(segment.baseAddress(), layout);
+        }
+    }
+
+    @Test(expectedExceptions = UnsupportedOperationException.class)
+    public void testTooBigForArray() {
+        MemorySegment.allocateNative((long) Integer.MAX_VALUE * 2).toByteArray();
+    }
+
+    @Test(expectedExceptions = IllegalStateException.class)
+    public void testArrayFromClosedSegment() {
+        MemorySegment segment = MemorySegment.allocateNative(8);
+        segment.close();
+        segment.toByteArray();
+    }
+
+    @DataProvider(name = "arrays")
+    public Object[][] nativeAccessOps() {
+        Consumer<MemoryAddress> byteInitializer =
+                (base) -> initBytes(base, bytes, (addr, pos) -> byteHandle.set(addr, pos, (byte)(long)pos));
+        Consumer<MemoryAddress> charInitializer =
+                (base) -> initBytes(base, chars, (addr, pos) -> charHandle.set(addr, pos, (char)(long)pos));
+        Consumer<MemoryAddress> shortInitializer =
+                (base) -> initBytes(base, shorts, (addr, pos) -> shortHandle.set(addr, pos, (short)(long)pos));
+        Consumer<MemoryAddress> intInitializer =
+                (base) -> initBytes(base, ints, (addr, pos) -> intHandle.set(addr, pos, (int)(long)pos));
+        Consumer<MemoryAddress> floatInitializer =
+                (base) -> initBytes(base, floats, (addr, pos) -> floatHandle.set(addr, pos, (float)(long)pos));
+        Consumer<MemoryAddress> longInitializer =
+                (base) -> initBytes(base, longs, (addr, pos) -> longHandle.set(addr, pos, (long)pos));
+        Consumer<MemoryAddress> doubleInitializer =
+                (base) -> initBytes(base, doubles, (addr, pos) -> doubleHandle.set(addr, pos, (double)(long)pos));
+
+        return new Object[][]{
+                {byteInitializer, bytes},
+                {charInitializer, chars},
+                {shortInitializer, shorts},
+                {intInitializer, ints},
+                {floatInitializer, floats},
+                {longInitializer, longs},
+                {doubleInitializer, doubles}
+        };
+    }
+}