ceph/src/boost/libs/histogram/test/axis_category_test.cpp

   1 // Copyright 2015-2018 Hans Dembinski
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/core/lightweight_test.hpp>
   8 #include <boost/core/lightweight_test_trait.hpp>
   9 #include <boost/histogram/axis/category.hpp>
  10 #include <boost/histogram/axis/ostream.hpp>
  11 #include <boost/histogram/axis/traits.hpp>
  12 #include <limits>
  13 #include <sstream>
  14 #include <string>
  15 #include <type_traits>
  16 #include "std_ostream.hpp"
  17 #include "throw_exception.hpp"
  18 #include "utility_axis.hpp"
  19 #include "utility_str.hpp"
  20
  21 int main() {
  22   using namespace boost::histogram;
  23
  24   BOOST_TEST(std::is_nothrow_move_constructible<axis::category<int>>::value);
  25   BOOST_TEST(std::is_nothrow_move_constructible<axis::category<std::string>>::value);
  26   BOOST_TEST(std::is_nothrow_move_assignable<axis::category<int>>::value);
  27   BOOST_TEST(std::is_nothrow_move_assignable<axis::category<std::string>>::value);
  28
  29   // bad ctor
  30   {
  31     int x[2];
  32     (void)x;
  33     BOOST_TEST_THROWS(axis::category<int>(x + 1, x), std::invalid_argument);
  34   }
  35
  36   // value should return copy for arithmetic types and const reference otherwise
  37   {
  38     enum class Foo { foo };
  39
  40     BOOST_TEST_TRAIT_SAME(axis::traits::value_type<axis::category<std::string>>,
  41                           std::string);
  42     BOOST_TEST_TRAIT_SAME(decltype(std::declval<axis::category<std::string>>().value(0)),
  43                           const std::string&);
  44     BOOST_TEST_TRAIT_SAME(axis::traits::value_type<axis::category<const char*>>,
  45                           const char*);
  46     BOOST_TEST_TRAIT_SAME(decltype(std::declval<axis::category<const char*>>().value(0)),
  47                           const char*);
  48     BOOST_TEST_TRAIT_SAME(axis::traits::value_type<axis::category<Foo>>, Foo);
  49     BOOST_TEST_TRAIT_SAME(decltype(std::declval<axis::category<Foo>>().value(0)), Foo);
  50     BOOST_TEST_TRAIT_SAME(axis::traits::value_type<axis::category<int>>, int);
  51     BOOST_TEST_TRAIT_SAME(decltype(std::declval<axis::category<int>>().value(0)), int);
  52   }
  53
  54   // empty axis::category
  55   {
  56     axis::category<int> a;
  57     axis::category<int> b(std::vector<int>(0));
  58     BOOST_TEST_EQ(a, b);
  59     BOOST_TEST_EQ(a.size(), 0);
  60     BOOST_TEST_EQ(a.index(-1), 0);
  61     BOOST_TEST_EQ(a.index(0), 0);
  62     BOOST_TEST_EQ(a.index(1), 0);
  63   }
  64
  65   // axis::category
  66   {
  67     std::string A("A"), B("B"), C("C"), other;
  68
  69     axis::category<std::string> a({A, B, C}, "foo");
  70     BOOST_TEST_EQ(a.metadata(), "foo");
  71     BOOST_TEST_EQ(static_cast<const axis::category<std::string>&>(a).metadata(), "foo");
  72     a.metadata() = "bar";
  73     BOOST_TEST_EQ(static_cast<const axis::category<std::string>&>(a).metadata(), "bar");
  74     BOOST_TEST_EQ(a.size(), 3);
  75     BOOST_TEST_EQ(a.index(A), 0);
  76     BOOST_TEST_EQ(a.index(B), 1);
  77     BOOST_TEST_EQ(a.index(C), 2);
  78     BOOST_TEST_EQ(a.index(other), 3);
  79     BOOST_TEST_EQ(a.value(0), A);
  80     BOOST_TEST_EQ(a.value(1), B);
  81     BOOST_TEST_EQ(a.value(2), C);
  82     BOOST_TEST_THROWS(a.value(3), std::out_of_range);
  83
  84     BOOST_TEST_CSTR_EQ(
  85         str(a).c_str(),
  86         "category(\"A\", \"B\", \"C\", metadata=\"bar\", options=overflow)");
  87   }
  88
  89   // category<int, axis::null_type>: copy, move
  90   {
  91     using C = axis::category<int, axis::null_type>;
  92     C a({1, 2, 3});
  93     C a2(a);
  94     BOOST_TEST_EQ(a2, a);
  95     C b;
  96     BOOST_TEST_NE(a, b);
  97     b = a;
  98     BOOST_TEST_EQ(a, b);
  99     b = C{{2, 1, 3}};
 100     BOOST_TEST_NE(a, b);
 101     b = a;
 102     BOOST_TEST_EQ(a, b);
 103     C c = std::move(b);
 104     BOOST_TEST_EQ(c, a);
 105     C d;
 106     BOOST_TEST_NE(c, d);
 107     d = std::move(c);
 108     BOOST_TEST_EQ(d, a);
 109   }
 110
 111   // category<std::string>: copy, move
 112   {
 113     using C = axis::category<std::string>;
 114
 115     C a({"A", "B", "C"}, "foo");
 116     C a2(a);
 117     BOOST_TEST_EQ(a2, a);
 118     C b;
 119     BOOST_TEST_NE(a, b);
 120     b = a;
 121     BOOST_TEST_EQ(a, b);
 122     b = C{{"B", "A", "C"}};
 123     BOOST_TEST_NE(a, b);
 124     b = a;
 125     BOOST_TEST_EQ(a, b);
 126     C c = std::move(b);
 127     BOOST_TEST_EQ(c, a);
 128     C d;
 129     BOOST_TEST_NE(c, d);
 130     d = std::move(c);
 131     BOOST_TEST_EQ(d, a);
 132   }
 133
 134   // axis::category with growth
 135   {
 136     using pii_t = std::pair<axis::index_type, axis::index_type>;
 137     axis::category<int, axis::null_type, axis::option::growth_t> a;
 138     BOOST_TEST_EQ(a.size(), 0);
 139     BOOST_TEST_EQ(a.update(5), pii_t(0, -1));
 140     BOOST_TEST_EQ(a.size(), 1);
 141     BOOST_TEST_EQ(a.update(1), pii_t(1, -1));
 142     BOOST_TEST_EQ(a.size(), 2);
 143     BOOST_TEST_EQ(a.update(10), pii_t(2, -1));
 144     BOOST_TEST_EQ(a.size(), 3);
 145     BOOST_TEST_EQ(a.update(10), pii_t(2, 0));
 146     BOOST_TEST_EQ(a.size(), 3);
 147
 148     BOOST_TEST_EQ(str(a), "category(5, 1, 10, options=growth)");
 149   }
 150
 151   // iterators
 152   {
 153     test_axis_iterator(axis::category<>({3, 1, 2}, ""), 0, 3);
 154     test_axis_iterator(axis::category<std::string>({"A", "B"}, ""), 0, 2);
 155   }
 156
 157   return boost::report_errors();
 158 }