Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/jaegertracing/opentelemetry-cpp/sdk/test/common/fast_random_number_generator_test.cc b/src/jaegertracing/opentelemetry-cpp/sdk/test/common/fast_random_number_generator_test.cc
new file mode 100644
index 000000000..e9209fdb6
--- /dev/null
+++ b/src/jaegertracing/opentelemetry-cpp/sdk/test/common/fast_random_number_generator_test.cc
@@ -0,0 +1,22 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#include "src/common/random.h"
+
+#include <random>
+
+#include <gtest/gtest.h>
+
+using opentelemetry::sdk::common::FastRandomNumberGenerator;
+
+TEST(FastRandomNumberGeneratorTest, GenerateUniqueNumbers)
+{
+  std::seed_seq seed_sequence{1, 2, 3};
+  FastRandomNumberGenerator random_number_generator;
+  random_number_generator.seed(seed_sequence);
+  std::set<uint64_t> values;
+  for (int i = 0; i < 1000; ++i)
+  {
+    EXPECT_TRUE(values.insert(random_number_generator()).second);
+  }
+}