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34 
35 #include <pdal/pdal_test_main.hpp>
36 
37 #include <random>
38 
39 #include <pdal/compression/DeflateCompression.hpp>
40 
41 using namespace pdal;
42 
TEST(Compression,deflate)43 TEST(Compression, deflate)
44 {
45     std::default_random_engine generator;
46     std::uniform_int_distribution<int> dist((std::numeric_limits<int>::min)());
47 
48     // Choosing a size that isn't a multiple of the internal buffer.
49     std::vector<int> orig(1000357);
50     // Trying to make something that compresses reasonably well.
51     int val = dist(generator);
52     for (size_t i = 0; i < orig.size(); ++i)
53     {
54         orig[i] = val++;
55         if (i % 100 == 0)
56             val = dist(generator);
57     }
58 
59     std::vector<char> compressed;
60     auto cb = [&compressed](char *buf, size_t bufsize)
61     {
62         static size_t total = 0;
63         compressed.insert(compressed.end(), buf, buf + bufsize);
64         total += bufsize;
65     };
66 
67     DeflateCompressor compressor(cb);
68 
69     size_t s = orig.size() * sizeof(int);
70     char *sp = reinterpret_cast<char *>(orig.data());
71     compressor.compress(sp, s);
72     compressor.done();
73 
74     auto verifier = [&sp](char *buf, size_t bufsize)
75     {
76         EXPECT_EQ(memcmp(buf, sp, bufsize), 0);
77         sp += bufsize;
78     };
79 
80     DeflateDecompressor decompressor(verifier);
81     decompressor.decompress(compressed.data(), compressed.size());
82     decompressor.done();
83 }
84 
85