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      1 /*
      2  * libjingle
      3  * Copyright 2004--2011, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/base/buffer.h"
     29 #include "talk/base/gunit.h"
     30 
     31 namespace talk_base {
     32 
     33 static const char kTestData[] = {
     34   0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF
     35 };
     36 
     37 TEST(BufferTest, TestConstructDefault) {
     38   Buffer buf;
     39   EXPECT_EQ(0U, buf.length());
     40   EXPECT_EQ(0U, buf.capacity());
     41   EXPECT_EQ(Buffer(), buf);
     42 }
     43 
     44 TEST(BufferTest, TestConstructEmptyWithCapacity) {
     45   Buffer buf(NULL, 0, 256U);
     46   EXPECT_EQ(0U, buf.length());
     47   EXPECT_EQ(256U, buf.capacity());
     48   EXPECT_EQ(Buffer(), buf);
     49 }
     50 
     51 TEST(BufferTest, TestConstructData) {
     52   Buffer buf(kTestData, sizeof(kTestData));
     53   EXPECT_EQ(sizeof(kTestData), buf.length());
     54   EXPECT_EQ(sizeof(kTestData), buf.capacity());
     55   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
     56   EXPECT_EQ(Buffer(kTestData, sizeof(kTestData)), buf);
     57 }
     58 
     59 TEST(BufferTest, TestConstructDataWithCapacity) {
     60   Buffer buf(kTestData, sizeof(kTestData), 256U);
     61   EXPECT_EQ(sizeof(kTestData), buf.length());
     62   EXPECT_EQ(256U, buf.capacity());
     63   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
     64   EXPECT_EQ(Buffer(kTestData, sizeof(kTestData)), buf);
     65 }
     66 
     67 TEST(BufferTest, TestConstructCopy) {
     68   Buffer buf1(kTestData, sizeof(kTestData), 256), buf2(buf1);
     69   EXPECT_EQ(sizeof(kTestData), buf2.length());
     70   EXPECT_EQ(sizeof(kTestData), buf2.capacity());  // capacity isn't copied
     71   EXPECT_EQ(0, memcmp(buf2.data(), kTestData, sizeof(kTestData)));
     72   EXPECT_EQ(buf1, buf2);
     73 }
     74 
     75 TEST(BufferTest, TestAssign) {
     76   Buffer buf1, buf2(kTestData, sizeof(kTestData), 256);
     77   EXPECT_NE(buf1, buf2);
     78   buf1 = buf2;
     79   EXPECT_EQ(sizeof(kTestData), buf1.length());
     80   EXPECT_EQ(sizeof(kTestData), buf1.capacity());  // capacity isn't copied
     81   EXPECT_EQ(0, memcmp(buf1.data(), kTestData, sizeof(kTestData)));
     82   EXPECT_EQ(buf1, buf2);
     83 }
     84 
     85 TEST(BufferTest, TestSetData) {
     86   Buffer buf;
     87   buf.SetData(kTestData, sizeof(kTestData));
     88   EXPECT_EQ(sizeof(kTestData), buf.length());
     89   EXPECT_EQ(sizeof(kTestData), buf.capacity());
     90   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
     91 }
     92 
     93 TEST(BufferTest, TestAppendData) {
     94   Buffer buf(kTestData, sizeof(kTestData));
     95   buf.AppendData(kTestData, sizeof(kTestData));
     96   EXPECT_EQ(2 * sizeof(kTestData), buf.length());
     97   EXPECT_EQ(2 * sizeof(kTestData), buf.capacity());
     98   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
     99   EXPECT_EQ(0, memcmp(buf.data() + sizeof(kTestData),
    100                       kTestData, sizeof(kTestData)));
    101 }
    102 
    103 TEST(BufferTest, TestSetLengthSmaller) {
    104   Buffer buf;
    105   buf.SetData(kTestData, sizeof(kTestData));
    106   buf.SetLength(sizeof(kTestData) / 2);
    107   EXPECT_EQ(sizeof(kTestData) / 2, buf.length());
    108   EXPECT_EQ(sizeof(kTestData), buf.capacity());
    109   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData) / 2));
    110 }
    111 
    112 TEST(BufferTest, TestSetLengthLarger) {
    113   Buffer buf;
    114   buf.SetData(kTestData, sizeof(kTestData));
    115   buf.SetLength(sizeof(kTestData) * 2);
    116   EXPECT_EQ(sizeof(kTestData) * 2, buf.length());
    117   EXPECT_EQ(sizeof(kTestData) * 2, buf.capacity());
    118   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
    119 }
    120 
    121 TEST(BufferTest, TestSetCapacitySmaller) {
    122   Buffer buf;
    123   buf.SetData(kTestData, sizeof(kTestData));
    124   buf.SetCapacity(sizeof(kTestData) / 2);  // should be ignored
    125   EXPECT_EQ(sizeof(kTestData), buf.length());
    126   EXPECT_EQ(sizeof(kTestData), buf.capacity());
    127   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
    128 }
    129 
    130 TEST(BufferTest, TestSetCapacityLarger) {
    131   Buffer buf(kTestData, sizeof(kTestData));
    132   buf.SetCapacity(sizeof(kTestData) * 2);
    133   EXPECT_EQ(sizeof(kTestData), buf.length());
    134   EXPECT_EQ(sizeof(kTestData) * 2, buf.capacity());
    135   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
    136 }
    137 
    138 TEST(BufferTest, TestSetCapacityThenSetLength) {
    139   Buffer buf(kTestData, sizeof(kTestData));
    140   buf.SetCapacity(sizeof(kTestData) * 4);
    141   memcpy(buf.data() + sizeof(kTestData), kTestData, sizeof(kTestData));
    142   buf.SetLength(sizeof(kTestData) * 2);
    143   EXPECT_EQ(sizeof(kTestData) * 2, buf.length());
    144   EXPECT_EQ(sizeof(kTestData) * 4, buf.capacity());
    145   EXPECT_EQ(0, memcmp(buf.data(), kTestData, sizeof(kTestData)));
    146   EXPECT_EQ(0, memcmp(buf.data() + sizeof(kTestData),
    147                       kTestData, sizeof(kTestData)));
    148 }
    149 
    150 TEST(BufferTest, TestTransfer) {
    151   Buffer buf1(kTestData, sizeof(kTestData), 256U), buf2;
    152   buf1.TransferTo(&buf2);
    153   EXPECT_EQ(0U, buf1.length());
    154   EXPECT_EQ(0U, buf1.capacity());
    155   EXPECT_EQ(sizeof(kTestData), buf2.length());
    156   EXPECT_EQ(256U, buf2.capacity());  // capacity does transfer
    157   EXPECT_EQ(0, memcmp(buf2.data(), kTestData, sizeof(kTestData)));
    158 }
    159 
    160 }  // namespace talk_base
    161