added session tests

backends/tests/QueryTest.cpp

@@ -370,7 +370,7 @@ TEST_CASE_METHOD(QueryFixture, "Select statement with foreign key and for single
 
   auto expected_flight = flights[0];
 
-  REQUIRE(result.has_value());
+  REQUIRE(result);
   REQUIRE(result->id == expected_flight->id);
   REQUIRE(result->pilot_name == expected_flight->pilot_name);
   REQUIRE(result->airplane.get());

backends/tests/SessionTest.cpp

@@ -51,6 +51,9 @@ TEST_CASE_METHOD(SessionFixture, "Find object with id", "[session][find]") {
   ses.create_schema();
   auto a380 = ses.insert<airplane>(1, "Boeing", "A380");
 
-  ses.find<airplane>(1);
+  auto result = ses.find<airplane>(1);
 
+  REQUIRE(result);
+  auto read_a380 = result.value();
+  REQUIRE(a380->id == read_a380->id);
 }