ceph/src/boost/libs/uuid/test/test_detail_random_provider.cpp

   1 //
   2 // Copyright (c) 2017 James E. King III
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 //   http://www.boost.org/LICENCE_1_0.txt)
   7 //
   8 // Positive and negative testing for detail::random_provider
   9 //
  10
  11 #include <boost/array.hpp>
  12 #include <boost/cstdint.hpp>
  13 #include <boost/detail/lightweight_test.hpp>
  14
  15 // The mock needs to load first for posix system call redirection to work properly
  16 #include "mock_random.hpp"
  17 #include <boost/uuid/detail/random_provider.hpp>
  18 #include <boost/uuid/uuid.hpp>
  19 #include <boost/uuid/uuid_io.hpp>
  20 #include <limits>
  21 #include <string.h>
  22
  23
  24 int main(int, char*[])
  25 {
  26 #if !defined(BOOST_UUID_TEST_RANDOM_MOCK)   // Positive Testing
  27
  28     boost::uuids::detail::random_provider provider;
  29     boost::array<unsigned int, 2> ints;
  30
  31     // test generator()
  32     ints[0] = 0;
  33     ints[1] = 0;
  34     provider.generate(ints.begin(), ints.end());
  35     BOOST_TEST_NE(ints[0], ints[1]);
  36
  37     // test name()
  38     BOOST_TEST_GT(strlen(provider.name()), 4u);
  39
  40     // test get_random_bytes()
  41     char buf1[64];
  42     char buf2[64];
  43     provider.get_random_bytes(buf1, 64);
  44     provider.get_random_bytes(buf2, 64);
  45     BOOST_TEST_NE(0, memcmp(buf1, buf2, 64));
  46
  47 #else                                       // Negative Testing
  48
  49     if (expectations_capable())
  50     {
  51         // Test fail acquiring context if the provider supports it
  52         if (provider_acquires_context())
  53         {
  54             expect_next_call_success(false);
  55             BOOST_TEST_THROWS(boost::uuids::detail::random_provider(),
  56                               boost::uuids::entropy_error);
  57             BOOST_TEST(expectations_met());
  58         }
  59
  60         // Test fail acquiring entropy
  61         if (provider_acquires_context())
  62         {
  63             expect_next_call_success(true);
  64         }
  65         expect_next_call_success(false);
  66         // 4 is important for the posix negative test (partial read) to work properly
  67         // as it sees a size of 4, returns 1, causing a 2nd loop to read 3 more bytes...
  68         char buf[4];
  69         BOOST_TEST_THROWS(boost::uuids::detail::random_provider().get_random_bytes(buf, 4),
  70                           boost::uuids::entropy_error);
  71         BOOST_TEST(expectations_met());
  72     }
  73
  74 #endif
  75
  76     return boost::report_errors();
  77 }