summaryrefslogtreecommitdiff
path: root/indra/llcommon/tests/llstreamqueue_test.cpp
blob: 82b451119ed048fbffc97e5491857f1688a497de (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
/**
 * @file   llstreamqueue_test.cpp
 * @author Nat Goodspeed
 * @date   2012-01-05
 * @brief  Test for llstreamqueue.
 *
 * $LicenseInfo:firstyear=2012&license=viewerlgpl$
 * Copyright (c) 2012, Linden Research, Inc.
 * $/LicenseInfo$
 */

// Precompiled header
#include "linden_common.h"
// associated header
#include "llstreamqueue.h"
// STL headers
#include <vector>
// other Linden headers
#include "../test/lltut.h"
#include "stringize.h"

/*****************************************************************************
*   TUT
*****************************************************************************/
namespace tut
{
    struct llstreamqueue_data
    {
        llstreamqueue_data():
            // we want a buffer with actual bytes in it, not an empty vector
            buffer(10)
        {}
        // As LLStreamQueue is merely a typedef for
        // LLGenericStreamQueue<char>, and no logic in LLGenericStreamQueue is
        // specific to the <char> instantiation, we're comfortable for now
        // testing only the narrow-char version.
        LLStreamQueue strq;
        // buffer for use in multiple tests
        std::vector<char> buffer;
    };
    typedef test_group<llstreamqueue_data> llstreamqueue_group;
    typedef llstreamqueue_group::object object;
    llstreamqueue_group llstreamqueuegrp("llstreamqueue");

    template<> template<>
    void object::test<1>()
    {
        set_test_name("empty LLStreamQueue");
        ensure_equals("brand-new LLStreamQueue isn't empty",
                      strq.size(), 0);
        ensure_equals("brand-new LLStreamQueue returns data",
                      strq.asSource().read(&buffer[0], buffer.size()), 0);
        strq.asSink().close();
        ensure_equals("closed empty LLStreamQueue not at EOF",
                      strq.asSource().read(&buffer[0], buffer.size()), -1);
    }

    template<> template<>
    void object::test<2>()
    {
        set_test_name("one internal block, one buffer");
        LLStreamQueue::Sink sink(strq.asSink());
        ensure_equals("write(\"\")", sink.write("", 0), 0);
        ensure_equals("0 write should leave LLStreamQueue empty (size())",
                      strq.size(), 0);
        ensure_equals("0 write should leave LLStreamQueue empty (peek())",
                      strq.peek(&buffer[0], buffer.size()), 0);
        // The meaning of "atomic" is that it must be smaller than our buffer.
        std::string atomic("atomic");
        ensure("test data exceeds buffer", atomic.length() < buffer.size());
        ensure_equals(STRINGIZE("write(\"" << atomic << "\")"),
                      sink.write(&atomic[0], atomic.length()), atomic.length());
        ensure_equals("size() after write()", strq.size(), atomic.length());
        size_t peeklen(strq.peek(&buffer[0], buffer.size()));
        ensure_equals(STRINGIZE("peek(\"" << atomic << "\")"),
                      peeklen, atomic.length());
        ensure_equals(STRINGIZE("peek(\"" << atomic << "\") result"),
                      std::string(buffer.begin(), buffer.begin() + peeklen), atomic);
        ensure_equals("size() after peek()", strq.size(), atomic.length());
        // peek() should not consume. Use a different buffer to prove it isn't
        // just leftover data from the first peek().
        std::vector<char> again(buffer.size());
        peeklen = size_t(strq.peek(&again[0], again.size()));
        ensure_equals(STRINGIZE("peek(\"" << atomic << "\") again"),
                      peeklen, atomic.length());
        ensure_equals(STRINGIZE("peek(\"" << atomic << "\") again result"),
                      std::string(again.begin(), again.begin() + peeklen), atomic);
        // now consume.
        std::vector<char> third(buffer.size());
        size_t readlen(strq.read(&third[0], third.size()));
        ensure_equals(STRINGIZE("read(\"" << atomic << "\")"),
                      readlen, atomic.length());
        ensure_equals(STRINGIZE("read(\"" << atomic << "\") result"),
                      std::string(third.begin(), third.begin() + readlen), atomic);
        ensure_equals("peek() after read()", strq.peek(&buffer[0], buffer.size()), 0);
        ensure_equals("size() after read()", strq.size(), 0);
    }

    template<> template<>
    void object::test<3>()
    {
        set_test_name("basic skip()");
        std::string lovecraft("lovecraft");
        ensure("test data exceeds buffer", lovecraft.length() < buffer.size());
        ensure_equals(STRINGIZE("write(\"" << lovecraft << "\")"),
                      strq.write(&lovecraft[0], lovecraft.length()), lovecraft.length());
        size_t peeklen(strq.peek(&buffer[0], buffer.size()));
        ensure_equals(STRINGIZE("peek(\"" << lovecraft << "\")"),
                      peeklen, lovecraft.length());
        ensure_equals(STRINGIZE("peek(\"" << lovecraft << "\") result"),
                      std::string(buffer.begin(), buffer.begin() + peeklen), lovecraft);
        std::streamsize skip1(4);
        ensure_equals(STRINGIZE("skip(" << skip1 << ")"), strq.skip(skip1), skip1);
        ensure_equals("size() after skip()", strq.size(), lovecraft.length() - skip1);
        size_t readlen(strq.read(&buffer[0], buffer.size()));
        ensure_equals(STRINGIZE("read(\"" << lovecraft.substr(skip1) << "\")"),
                      readlen, lovecraft.length() - skip1);
        ensure_equals(STRINGIZE("read(\"" << lovecraft.substr(skip1) << "\") result"),
                      std::string(buffer.begin(), buffer.begin() + readlen),
                      lovecraft.substr(skip1));
        ensure_equals("unconsumed", strq.read(&buffer[0], buffer.size()), 0);
    }

    template<> template<>
    void object::test<4>()
    {
        set_test_name("skip() multiple blocks");
        std::string blocks[] = { "books of ", "H.P. ", "Lovecraft" };
        std::streamsize total(blocks[0].length() + blocks[1].length() + blocks[2].length());
        std::streamsize leave(5);   // len("craft") above
        std::streamsize skip(total - leave);
        std::streamsize written(0);
        for (const std::string& block : blocks)
        {
            written += strq.write(&block[0], block.length());
            ensure_equals("size() after write()", strq.size(), written);
        }
        std::streamsize skiplen(strq.skip(skip));
        ensure_equals(STRINGIZE("skip(" << skip << ")"), skiplen, skip);
        ensure_equals("size() after skip()", strq.size(), leave);
        size_t readlen(strq.read(&buffer[0], buffer.size()));
        ensure_equals("read(\"craft\")", readlen, leave);
        ensure_equals("read(\"craft\") result",
                      std::string(buffer.begin(), buffer.begin() + readlen), "craft");
    }

    template<> template<>
    void object::test<5>()
    {
        set_test_name("concatenate blocks");
        std::string blocks[] = { "abcd", "efghij", "klmnopqrs" };
        for (const std::string& block : blocks)
        {
            strq.write(&block[0], block.length());
        }
        std::vector<char> longbuffer(30);
        std::streamsize readlen(strq.read(&longbuffer[0], longbuffer.size()));
        ensure_equals("read() multiple blocks",
                      readlen, blocks[0].length() + blocks[1].length() + blocks[2].length());
        ensure_equals("read() multiple blocks result",
                      std::string(longbuffer.begin(), longbuffer.begin() + readlen),
                      blocks[0] + blocks[1] + blocks[2]);
    }

    template<> template<>
    void object::test<6>()
    {
        set_test_name("split blocks");
        std::string blocks[] = { "abcdefghijklm", "nopqrstuvwxyz" };
        for (const std::string& block : blocks)
        {
            strq.write(&block[0], block.length());
        }
        strq.close();
        // We've already verified what strq.size() should be at this point;
        // see above test named "skip() multiple blocks"
        std::streamsize chksize(strq.size());
        std::streamsize readlen(strq.read(&buffer[0], buffer.size()));
        ensure_equals("read() 0", readlen, buffer.size());
        ensure_equals("read() 0 result", std::string(buffer.begin(), buffer.end()), "abcdefghij");
        chksize -= readlen;
        ensure_equals("size() after read() 0", strq.size(), chksize);
        readlen = strq.read(&buffer[0], buffer.size());
        ensure_equals("read() 1", readlen, buffer.size());
        ensure_equals("read() 1 result", std::string(buffer.begin(), buffer.end()), "klmnopqrst");
        chksize -= readlen;
        ensure_equals("size() after read() 1", strq.size(), chksize);
        readlen = strq.read(&buffer[0], buffer.size());
        ensure_equals("read() 2", readlen, chksize);
        ensure_equals("read() 2 result",
                      std::string(buffer.begin(), buffer.begin() + readlen), "uvwxyz");
        ensure_equals("read() 3", strq.read(&buffer[0], buffer.size()), -1);
    }
} // namespace tut