[OMON-384] Test backends writing to output by redirecting cout (#241)

Author: awegrzyn

test/testInfluxDb.cxx

@@ -29,6 +29,10 @@ BOOST_AUTO_TEST_CASE(simplySendMetric2)
 {
   using namespace std::string_literals;
   auto monitoring = MonitoringFactory::Get("influxdb-stdout://");
+
+  std::stringstream coutRedirect;
+  std::streambuf* coutBuffer = std::cout.rdbuf(coutRedirect.rdbuf());
+
   monitoring->send(Metric{"card"}
     .addValue(40.217773, "temperature")
     .addValue(0, "droppedPackets")
@@ -38,6 +42,9 @@ BOOST_AUTO_TEST_CASE(simplySendMetric2)
     .addTag(tags::Key::ID, 3)
     .addTag(tags::Key::Type, tags::Value::CRU)
   );
+  std::string expected1 = "card,hostname=pcaldadam2.local,id=3,type=CRU temperature=40.2178,droppedPackets=0i,ctpClock=0.76817,localClock=240.471,totalPacketsPerSecond=0i 1618241730312076000\n";
+  BOOST_CHECK(expected1.compare(coutRedirect.str()));
+  coutRedirect.str(std::string());
 
   monitoring->send(Metric{"link"}
     .addValue("GBT/GBT"s, "gbtMode")
@@ -52,6 +59,10 @@ BOOST_AUTO_TEST_CASE(simplySendMetric2)
     .addTag(tags::Key::CRU, 3)
     .addTag(tags::Key::ID, 3)
   );
+  std::string expected2 = R"(link,hostname=pcaldadam2.local,CRU=3,id=3 gbtMode="GBT/GBT",loopback="None",gbtMux="TTC:CTP",datapathMode="Continuous",datapath="Disabled",rxFreq=181.371,txFreq=196.25,status=0i,opticalPower=657.4 1618241730312104000)";
+  BOOST_CHECK(expected2.compare(coutRedirect.str()));
+
+  std::cout.rdbuf(coutBuffer);
 }
 
 BOOST_AUTO_TEST_CASE(InfluxDbv2)

test/testMonitoringFactory.cxx

@@ -11,7 +11,7 @@
 #include <chrono>
 #include <vector>
 
-#define BOOST_TEST_MODULE TestMonitoringFactory
+#define BOOST_TEST_MODULE TestMonitoringVerbosityy
 #define BOOST_TEST_DYN_LINK
 #include <boost/test/unit_test.hpp>
 #include <boost/lexical_cast.hpp>

test/testThreads.cxx

@@ -15,7 +15,7 @@ namespace Test
 
 using namespace o2::monitoring;
 
-BOOST_AUTO_TEST_CASE(retrieveOtherParams)
+BOOST_AUTO_TEST_CASE(runLibraryInMultipleThreads)
 {
   std::array<std::thread, 4> threads;
   for (auto& thread : threads) {