From 07268a1208bf1885432ea1d606b9e807caa16fc2 Mon Sep 17 00:00:00 2001
From: Pieter Lexis <pieter.lexis@powerdns.com>
Date: Fri, 3 Jul 2026 15:09:14 +0200
Subject: [PATCH] feat(dnsdist): Add OTLP-related unit-tests

---
 pdns/dnsdistdist/meson.build               |  1 +
 pdns/dnsdistdist/test-protozero-otlp_cc.cc | 77 ++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 pdns/dnsdistdist/test-protozero-otlp_cc.cc

diff --git a/pdns/dnsdistdist/meson.build b/pdns/dnsdistdist/meson.build
index 530abfe8f5..d3ea1bc0df 100644
--- a/pdns/dnsdistdist/meson.build
+++ b/pdns/dnsdistdist/meson.build
@@ -587,6 +587,7 @@ test_sources += files(
   src_dir / 'test-iputils_hh.cc',
   src_dir / 'test-luawrapper.cc',
   src_dir / 'test-mplexer.cc',
+  src_dir / 'test-protozero-otlp_cc.cc',
   src_dir / 'test-proxy_protocol_cc.cc',
   src_dir / 'test-sholder_hh.cc',
 )
diff --git a/pdns/dnsdistdist/test-protozero-otlp_cc.cc b/pdns/dnsdistdist/test-protozero-otlp_cc.cc
new file mode 100644
index 0000000000..70e352b912
--- /dev/null
+++ b/pdns/dnsdistdist/test-protozero-otlp_cc.cc
@@ -0,0 +1,77 @@
+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "misc.hh"
+#include "protozero-trace.hh"
+#include <boost/test/tools/old/interface.hpp>
+#include <boost/test/unit_test.hpp>
+#include <vector>
+
+#ifndef DISABLE_PROTOBUF
+
+#ifndef BOOST_TEST_DYN_LINK
+#define BOOST_TEST_DYN_LINK
+#endif
+
+#include "protozero-otlp.hh"
+#define BOOST_TEST_NO_MAIN
+
+BOOST_AUTO_TEST_SUITE(protozeroOtlp)
+BOOST_AUTO_TEST_CASE(ExportTraceServiceRequest)
+{
+  std::string buf;
+  protozero::pbf_writer writer{buf};
+
+  pdns::trace::ExportTraceServiceRequest etsr{
+    .resource_spans = {
+      {.resource = {
+         .attributes = {{pdns::trace::KeyValue{.key = "foo", .value = {"bar"}}}}},
+       .scope_spans = {{.scope = {.name = "test"}}}}}};
+
+  etsr.encode(writer);
+  BOOST_CHECK_EQUAL(buf, "\x0a\x1a\x0a\x0e\x0a\x0c\x0a\x03\x66\x6f\x6f\x12\x05\x0a\x03\x62\x61\x72\x12\x08\x0a\x06\x0a\x04\x74\x65\x73\x74");
+
+  protozero::pbf_reader reader{buf};
+  pdns::trace::ExportTraceServiceRequest outEtsr = pdns::trace::ExportTraceServiceRequest::decode(reader);
+  BOOST_CHECK(outEtsr == etsr);
+}
+
+BOOST_AUTO_TEST_CASE(ExportTraceServiceResponse)
+{
+  std::string buf;
+  protozero::pbf_writer writer{buf};
+
+  pdns::trace::ExportTraceServiceResponse etsr;
+  etsr.partial_success = {
+    2,
+    "I'm an error message!",
+  };
+  etsr.encode(writer);
+
+  BOOST_CHECK_EQUAL(buf, "\x0a\x19\x08\x02\x12\x15\x49\x27\x6d\x20\x61\x6e\x20\x65\x72\x72\x6f\x72\x20\x6d\x65\x73\x73\x61\x67\x65\x21");
+
+  protozero::pbf_reader reader{buf};
+  pdns::trace::ExportTraceServiceResponse outEtsr = pdns::trace::ExportTraceServiceResponse::decode(reader);
+  BOOST_CHECK(outEtsr == etsr);
+}
+BOOST_AUTO_TEST_SUITE_END()
+#endif // DISABLE_PROTOBUF
-- 
2.47.3