Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/DDS/DdsUnitTestsPlaceholder/ddsFunctionTopicTests_gtest.cpp

@@ -0,0 +1,20 @@
+#include <gtest/gtest.h>
+#include "mocks/MockDDS.h"
+#include <map>
+
+TEST(FunctionTopicSmokeGTest, Containers) {
+  std::map<std::string,int> m;
+  m["one"] = 1;
+  m["two"] = 2;
+  EXPECT_EQ(m["two"], 2);
+}
+
+TEST(FunctionTopicSmokeGTest, MockDDSTopicAsSignal) {
+  MockDDS::clear_all();
+  MockDDS::publish("func/topic", "evt:1");
+  auto val = MockDDS::take_last("func/topic");
+  auto payload = val.substr(val.find(':') + 1);
+  EXPECT_EQ(payload, "evt:1");
+  auto seq = std::stoul(val.substr(0, val.find(':')));
+  EXPECT_EQ(seq, 1UL);
+}