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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <string>
#include "opentelemetry/nostd/function_ref.h"
using namespace opentelemetry::nostd;
int Call(function_ref<int()> f)
{
return f();
}
int Return3()
{
return 3;
}
TEST(FunctionRefTest, Call)
{
int x = 9;
auto f = [&] { return x; };
EXPECT_EQ(Call(f), 9);
EXPECT_EQ(Call(Return3), 3);
}
TEST(FunctionRefTest, BoolConversion)
{
auto f = [] { return 0; };
function_ref<int()> fref1{nullptr};
function_ref<int()> fref2{f};
EXPECT_TRUE(!static_cast<bool>(fref1));
EXPECT_TRUE(static_cast<bool>(fref2));
}
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