ceph/src/boost/libs/test/doc/examples/dataset_example68.run-fail.cpp

   1 //  (C) Copyright Raffi Enficiaud 2014.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7
   8 //[example_code
   9 #define BOOST_TEST_MODULE dataset_example68
  10 #include <boost/test/included/unit_test.hpp>
  11 #include <boost/test/data/test_case.hpp>
  12 #include <boost/test/data/monomorphic.hpp>
  13 #include <sstream>
  14
  15 namespace bdata = boost::unit_test::data;
  16
  17 // Dataset generating a Fibonacci sequence
  18 class fibonacci_dataset {
  19 public:
  20     // Samples type is int
  21     using sample=int;
  22     enum { arity = 1 };
  23
  24     struct iterator {
  25
  26         iterator() : a(1), b(1) {}
  27
  28         int operator*() const   { return b; }
  29         void operator++()
  30         {
  31             a = a + b;
  32             std::swap(a, b);
  33         }
  34     private:
  35         int a;
  36         int b; // b is the output
  37     };
  38
  39     fibonacci_dataset()             {}
  40
  41     // size is infinite
  42     bdata::size_t   size() const    { return bdata::BOOST_TEST_DS_INFINITE_SIZE; }
  43
  44     // iterator
  45     iterator        begin() const   { return iterator(); }
  46 };
  47
  48 namespace boost { namespace unit_test { namespace data { namespace monomorphic {
  49   // registering fibonacci_dataset as a proper dataset
  50   template <>
  51   struct is_dataset<fibonacci_dataset> : boost::mpl::true_ {};
  52 }}}}
  53
  54 // Creating a test-driven dataset
  55 BOOST_DATA_TEST_CASE(
  56     test1,
  57     fibonacci_dataset() ^ bdata::make( { 1, 2, 3, 5, 8, 13, 21, 35, 56 } ),
  58     fib_sample, exp)
  59 {
  60       BOOST_TEST(fib_sample == exp);
  61 }
  62 //]