--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/util/concurrent/TimeUnit/Basic.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2005, 2006, 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
+ * @bug 5057341 6363898
+ * @summary Basic tests for TimeUnit
+ * @author Martin Buchholz
+ */
+
+import static java.util.concurrent.TimeUnit.DAYS;
+import static java.util.concurrent.TimeUnit.HOURS;
+import static java.util.concurrent.TimeUnit.MICROSECONDS;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static java.util.concurrent.TimeUnit.NANOSECONDS;
+import static java.util.concurrent.TimeUnit.SECONDS;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectInputStream;
+import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
+
+public class Basic {
+    private static void realMain(String[] args) throws Throwable {
+
+        for (TimeUnit u : TimeUnit.values()) {
+            System.out.println(u);
+            check(u instanceof TimeUnit);
+            equal(42L, u.convert(42, u));
+            for (TimeUnit v : TimeUnit.values())
+                if (u.convert(42, v) >= 42)
+                    equal(42L, v.convert(u.convert(42, v), u));
+            check(readObject(serializedForm(u)) == u);
+        }
+
+        equal(  24L, HOURS.convert       (1, DAYS));
+        equal(  60L, MINUTES.convert     (1, HOURS));
+        equal(  60L, SECONDS.convert     (1, MINUTES));
+        equal(1000L, MILLISECONDS.convert(1, SECONDS));
+        equal(1000L, MICROSECONDS.convert(1, MILLISECONDS));
+        equal(1000L, NANOSECONDS.convert (1, MICROSECONDS));
+
+        equal(  24L, DAYS.toHours(1));
+        equal(  60L, HOURS.toMinutes(1));
+        equal(  60L, MINUTES.toSeconds(1));
+        equal(1000L, SECONDS.toMillis(1));
+        equal(1000L, MILLISECONDS.toMicros(1));
+        equal(1000L, MICROSECONDS.toNanos(1));
+
+        long t0 = System.nanoTime();
+        MILLISECONDS.sleep(3); /* See windows bug 6313903, might not sleep */
+        long elapsedMillis = (System.nanoTime() - t0)/(1000L * 1000L);
+        System.out.printf("elapsed=%d%n", elapsedMillis);
+        check(elapsedMillis >= 0);
+        /* Might not sleep on windows: check(elapsedMillis >= 3); */
+        check(elapsedMillis < 1000);
+
+        //----------------------------------------------------------------
+        // Tests for serialized form compatibility with previous release
+        //----------------------------------------------------------------
+        byte[] serializedForm = /* Generated using tiger */
+            {-84, -19, 0, 5, '~', 'r', 0, 29, 'j', 'a', 'v', 'a', '.',
+             'u', 't', 'i', 'l', '.', 'c', 'o', 'n', 'c', 'u', 'r', 'r', 'e',
+             'n', 't', '.', 'T', 'i', 'm', 'e', 'U', 'n', 'i', 't', 0, 0,
+             0, 0, 0, 0, 0, 0, 18, 0, 0, 'x', 'r', 0, 14,
+             'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'E', 'n', 'u',
+             'm', 0, 0, 0, 0, 0, 0, 0, 0, 18, 0, 0, 'x',
+             'p', 't', 0, 7, 'S', 'E', 'C', 'O', 'N', 'D', 'S', };
+        check(Arrays.equals(serializedForm(SECONDS), serializedForm));
+    }
+
+    //--------------------- Infrastructure ---------------------------
+    static volatile int passed = 0, failed = 0;
+    static void pass() {passed++;}
+    static void fail() {failed++; Thread.dumpStack();}
+    static void fail(String msg) {System.out.println(msg); fail();}
+    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
+    static void check(boolean cond) {if (cond) pass(); else fail();}
+    static void equal(Object x, Object y) {
+        if (x == null ? y == null : x.equals(y)) pass();
+        else fail(x + " not equal to " + y);}
+    public static void main(String[] args) throws Throwable {
+        try {realMain(args);} catch (Throwable t) {unexpected(t);}
+        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
+        if (failed > 0) throw new AssertionError("Some tests failed");}
+    static byte[] serializedForm(Object obj) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        new ObjectOutputStream(baos).writeObject(obj);
+        return baos.toByteArray();
+    }
+    static Object readObject(byte[] bytes)
+        throws IOException, ClassNotFoundException {
+        InputStream is = new ByteArrayInputStream(bytes);
+        return new ObjectInputStream(is).readObject();
+    }
+}