--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/httpclient/whitebox/java.net.http/jdk/internal/net/http/common/DemandTest.java	Wed Feb 07 21:45:37 2018 +0000
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+package jdk.internal.net.http.common;
+
+import org.testng.annotations.Test;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+public class DemandTest {
+
+    @Test
+    public void test01() {
+        assertTrue(new Demand().isFulfilled());
+    }
+
+    @Test
+    public void test011() {
+        Demand d = new Demand();
+        d.increase(3);
+        d.decreaseAndGet(3);
+        assertTrue(d.isFulfilled());
+    }
+
+    @Test
+    public void test02() {
+        Demand d = new Demand();
+        d.increase(1);
+        assertFalse(d.isFulfilled());
+    }
+
+    @Test
+    public void test03() {
+        Demand d = new Demand();
+        d.increase(3);
+        assertEquals(d.decreaseAndGet(3), 3);
+    }
+
+    @Test
+    public void test04() {
+        Demand d = new Demand();
+        d.increase(3);
+        assertEquals(d.decreaseAndGet(5), 3);
+    }
+
+    @Test
+    public void test05() {
+        Demand d = new Demand();
+        d.increase(7);
+        assertEquals(d.decreaseAndGet(4), 4);
+    }
+
+    @Test
+    public void test06() {
+        Demand d = new Demand();
+        assertEquals(d.decreaseAndGet(3), 0);
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void test07() {
+        Demand d = new Demand();
+        d.increase(0);
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void test08() {
+        Demand d = new Demand();
+        d.increase(-1);
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void test09() {
+        Demand d = new Demand();
+        d.increase(10);
+        d.decreaseAndGet(0);
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void test10() {
+        Demand d = new Demand();
+        d.increase(13);
+        d.decreaseAndGet(-3);
+    }
+
+    @Test
+    public void test11() {
+        Demand d = new Demand();
+        d.increase(1);
+        assertTrue(d.tryDecrement());
+    }
+
+    @Test
+    public void test12() {
+        Demand d = new Demand();
+        d.increase(2);
+        assertTrue(d.tryDecrement());
+    }
+
+    @Test
+    public void test14() {
+        Demand d = new Demand();
+        assertFalse(d.tryDecrement());
+    }
+
+    @Test
+    public void test141() {
+        Demand d = new Demand();
+        d.increase(Long.MAX_VALUE);
+        assertFalse(d.isFulfilled());
+    }
+
+    @Test
+    public void test142() {
+        Demand d = new Demand();
+        d.increase(Long.MAX_VALUE);
+        d.increase(1);
+        assertFalse(d.isFulfilled());
+    }
+
+    @Test
+    public void test143() {
+        Demand d = new Demand();
+        d.increase(Long.MAX_VALUE);
+        d.increase(1);
+        assertFalse(d.isFulfilled());
+    }
+
+    @Test
+    public void test144() {
+        Demand d = new Demand();
+        d.increase(Long.MAX_VALUE);
+        d.increase(Long.MAX_VALUE);
+        d.decreaseAndGet(3);
+        d.decreaseAndGet(5);
+        assertFalse(d.isFulfilled());
+    }
+
+    @Test
+    public void test145() {
+        Demand d = new Demand();
+        d.increase(Long.MAX_VALUE);
+        d.decreaseAndGet(Long.MAX_VALUE);
+        assertTrue(d.isFulfilled());
+    }
+
+    @Test(invocationCount = 32)
+    public void test15() throws InterruptedException {
+        int N = Math.max(2, Runtime.getRuntime().availableProcessors() + 1);
+        int M = ((N + 1) * N) / 2; // 1 + 2 + 3 + ... N
+        Demand d = new Demand();
+        d.increase(M);
+        CyclicBarrier start = new CyclicBarrier(N);
+        CountDownLatch stop = new CountDownLatch(N);
+        AtomicReference<Throwable> error = new AtomicReference<>();
+        for (int i = 0; i < N; i++) {
+            int j = i + 1;
+            new Thread(() -> {
+                try {
+                    start.await();
+                } catch (Exception e) {
+                    error.compareAndSet(null, e);
+                }
+                try {
+                    assertEquals(d.decreaseAndGet(j), j);
+                } catch (Throwable t) {
+                    error.compareAndSet(null, t);
+                } finally {
+                    stop.countDown();
+                }
+            }).start();
+        }
+        stop.await();
+        assertTrue(d.isFulfilled());
+        assertEquals(error.get(), null);
+    }
+}