1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package jdk.internal.net.http;

    25 

    26 import org.testng.annotations.Test;

    27 import static jdk.internal.net.http.frame.SettingsFrame.DEFAULT_INITIAL_WINDOW_SIZE;

    28 import static org.testng.Assert.assertEquals;

    29 import static org.testng.Assert.assertThrows;

    30 

    31 public class WindowControllerTest {

    32 

    33     @Test

    34     public void testConnectionWindowOverflow() {

    35         WindowController wc = new WindowController();

    36         assertEquals(wc.connectionWindowSize(), DEFAULT_INITIAL_WINDOW_SIZE);

    37         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    38         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    39         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    40         assertEquals(wc.connectionWindowSize(), DEFAULT_INITIAL_WINDOW_SIZE);

    41 

    42         wc.registerStream(1, DEFAULT_INITIAL_WINDOW_SIZE);

    43         wc.tryAcquire(DEFAULT_INITIAL_WINDOW_SIZE - 1, 1, null);

    44         assertEquals(wc.connectionWindowSize(), 1);

    45         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    46         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    47         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    48         assertEquals(wc.connectionWindowSize(), 1);

    49 

    50         wc.increaseConnectionWindow(Integer.MAX_VALUE - 1 -1);

    51         assertEquals(wc.connectionWindowSize(), Integer.MAX_VALUE - 1);

    52         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    53         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    54         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    55         assertEquals(wc.connectionWindowSize(), Integer.MAX_VALUE - 1);

    56 

    57         wc.increaseConnectionWindow(1);

    58         assertEquals(wc.connectionWindowSize(), Integer.MAX_VALUE);

    59         assertEquals(wc.increaseConnectionWindow(1), false);

    60         assertEquals(wc.increaseConnectionWindow(100), false);

    61         assertEquals(wc.increaseConnectionWindow(Integer.MAX_VALUE), false);

    62         assertEquals(wc.connectionWindowSize(), Integer.MAX_VALUE);

    63     }

    64 

    65     @Test

    66     public void testStreamWindowOverflow() {

    67         WindowController wc = new WindowController();

    68         wc.registerStream(1, DEFAULT_INITIAL_WINDOW_SIZE);

    69         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 1), false);

    70         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 1), false);

    71         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 1), false);

    72 

    73         wc.registerStream(3, DEFAULT_INITIAL_WINDOW_SIZE);

    74         assertEquals(wc.increaseStreamWindow(100, 3), true);

    75         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 3), false);

    76         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 3), false);

    77 

    78         wc.registerStream(5, 0);

    79         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 5), true);

    80         assertEquals(wc.increaseStreamWindow(1, 5), false);

    81         assertEquals(wc.increaseStreamWindow(1, 5), false);

    82         assertEquals(wc.increaseStreamWindow(10, 5), false);

    83 

    84         wc.registerStream(7, -1);

    85         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 7), true);

    86         assertEquals(wc.increaseStreamWindow(1, 7), true);

    87         assertEquals(wc.increaseStreamWindow(1, 7), false);

    88         assertEquals(wc.increaseStreamWindow(10, 7), false);

    89 

    90         wc.registerStream(9, -1);

    91         assertEquals(wc.increaseStreamWindow(1, 9), true);

    92         assertEquals(wc.increaseStreamWindow(1, 9), true);

    93         assertEquals(wc.increaseStreamWindow(1, 9), true);

    94         assertEquals(wc.increaseStreamWindow(10, 9), true);

    95         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 9), false);

    96 

    97         wc.registerStream(11, -10);

    98         assertEquals(wc.increaseStreamWindow(1, 11), true);

    99         assertEquals(wc.increaseStreamWindow(1, 11), true);

   100         assertEquals(wc.increaseStreamWindow(1, 11), true);

   101         assertEquals(wc.increaseStreamWindow(1, 11), true);

   102         assertEquals(wc.increaseStreamWindow(1, 11), true);

   103         assertEquals(wc.increaseStreamWindow(1, 11), true);

   104         assertEquals(wc.increaseStreamWindow(1, 11), true);

   105         assertEquals(wc.increaseStreamWindow(1, 11), true);

   106         assertEquals(wc.increaseStreamWindow(1, 11), true);

   107         assertEquals(wc.increaseStreamWindow(1, 11), true);

   108         assertEquals(wc.increaseStreamWindow(1, 11), true);

   109         assertEquals(wc.streamWindowSize(11), 1);

   110         assertEquals(wc.increaseStreamWindow(Integer.MAX_VALUE, 11), false);

   111         assertEquals(wc.streamWindowSize(11), 1);

   112     }

   113 

   114     @Test

   115     public void testStreamAdjustment() {

   116         WindowController wc = new WindowController();

   117         wc.registerStream(1, 100);

   118         wc.registerStream(3, 100);

   119         wc.registerStream(5, 100);

   120 

   121         // simulate some stream send activity before receiving the server's

   122         // SETTINGS frame, and staying within the connection window size

   123         wc.tryAcquire(49, 1 , null);

   124         wc.tryAcquire(50, 3 , null);

   125         wc.tryAcquire(51, 5 , null);

   126 

   127         wc.adjustActiveStreams(-200);

   128         assertEquals(wc.streamWindowSize(1), -149);

   129         assertEquals(wc.streamWindowSize(3), -150);

   130         assertEquals(wc.streamWindowSize(5), -151);

   131     }

   132 

   133     static final Class<InternalError> IE = InternalError.class;

   134 

   135     @Test

   136     public void testRemoveStream() {

   137         WindowController wc = new WindowController();

   138         wc.registerStream(1, 999);

   139         wc.removeStream(1);

   140         assertThrows(IE, () -> wc.tryAcquire(5, 1, null));

   141 

   142         wc.registerStream(3, 999);

   143         wc.tryAcquire(998, 3, null);

   144         wc.removeStream(3);

   145         assertThrows(IE, () -> wc.tryAcquire(5, 1, null));

   146     }

   147 }