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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <cstdio>
#include <fstream>
#include <string>
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/resource_detectors/detail/container_detector_utils.h"
TEST(ContainerIdDetectorTest, ExtractValidContainerIdFromLine)
{
std::string line =
"13:name=systemd:/podruntime/docker/kubepods/ac679f8a8319c8cf7d38e1adf263bc08d23.aaaa";
std::string extracted_id =
opentelemetry::resource_detector::detail::ExtractContainerIDFromLine(line);
EXPECT_EQ(std::string{"ac679f8a8319c8cf7d38e1adf263bc08d23"}, extracted_id);
}
TEST(ContainerIdDetectorTest, ExtractIdFromMockUpCGroupFile)
{
const char *filename = "test_cgroup.txt";
{
std::ofstream outfile(filename);
outfile << "13:name=systemd:/kuberuntime/containerd"
"/kubepods-pod872d2066_00ef_48ea_a7d8_51b18b72d739:cri-containerd:"
"e857a4bf05a69080a759574949d7a0e69572e27647800fa7faff6a05a8332aa1\n";
outfile << "9:cpu:/not-a-container\n";
}
std::string container_id =
opentelemetry::resource_detector::detail::GetContainerIDFromCgroup(filename);
EXPECT_EQ(container_id,
std::string{"e857a4bf05a69080a759574949d7a0e69572e27647800fa7faff6a05a8332aa1"});
std::remove(filename);
}
TEST(ContainerIdDetectorTest, DoesNotExtractInvalidLine)
{
std::string line = "this line does not contain a container id";
std::string id = opentelemetry::resource_detector::detail::ExtractContainerIDFromLine(line);
EXPECT_EQ(id, std::string{""});
}
TEST(ContainerIdDetectorTest, ReturnsEmptyOnNoMatch)
{
const char *filename = "test_empty_cgroup.txt";
{
std::ofstream outfile(filename);
outfile << "no container id here\n";
}
std::string id = opentelemetry::resource_detector::detail::GetContainerIDFromCgroup(filename);
EXPECT_EQ(id, std::string{""});
std::remove(filename); // cleanup
}
TEST(ContainerIdDetectorTest, ReturnsEmptyOnFileFailingToOpen)
{
const char *filename = "test_invalid_cgroup.txt";
std::string id = opentelemetry::resource_detector::detail::GetContainerIDFromCgroup(filename);
EXPECT_EQ(id, std::string{""});
}
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