1 files changed, 36 insertions, 0 deletions
diff --git a/src/jaegertracing/opentelemetry-cpp/api/test/nostd/function_ref_test.cc b/src/jaegertracing/opentelemetry-cpp/api/test/nostd/function_ref_test.cc
new file mode 100644
index 000000000..1153360d2
--- /dev/null
+++ b/src/jaegertracing/opentelemetry-cpp/api/test/nostd/function_ref_test.cc
@@ -0,0 +1,36 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#include "opentelemetry/nostd/function_ref.h"
+
+#include <gtest/gtest.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));
+}