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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <initializer_list>
#include <string>
#include <tuple>
#include <type_traits>
#include <vector>
#include "opentelemetry/nostd/utility.h"
namespace nostd = opentelemetry::nostd;
template <class T>
auto IsDataCallable(const T &t) -> decltype(nostd::data(t), std::true_type{});
std::false_type IsDataCallable(...);
template <class T>
auto IsSizeCallable(const T &t) -> decltype(nostd::size(t), std::true_type{});
std::false_type IsSizeCallable(...);
TEST(UtilityTest, Data)
{
std::vector<int> v = {1, 2, 3};
int array[3] = {1, 2, 3};
std::initializer_list<int> list{1, 2, 3};
int x = 0;
std::ignore = x;
EXPECT_EQ(nostd::data(v), v.data());
EXPECT_EQ(nostd::data(array), array);
EXPECT_EQ(nostd::data(list), list.begin());
EXPECT_FALSE(decltype(IsDataCallable(x)){});
}
TEST(UtilityTest, Size)
{
std::vector<int> v = {1, 2, 3};
int array[3] = {1, 2, 3};
int x = 0;
std::ignore = x;
EXPECT_EQ(nostd::size(v), v.size());
EXPECT_EQ(nostd::size(array), 3);
EXPECT_FALSE(decltype(IsSizeCallable(x)){});
}
TEST(UtilityTest, MakeIndexSequence)
{
EXPECT_TRUE((std::is_same<nostd::make_index_sequence<0>, nostd::index_sequence<>>::value));
EXPECT_TRUE((std::is_same<nostd::make_index_sequence<1>, nostd::index_sequence<0>>::value));
EXPECT_TRUE((std::is_same<nostd::make_index_sequence<2>, nostd::index_sequence<0, 1>>::value));
}
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