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