test: add executor operator unit tests

Add 20 tests covering BufferScan, Limit, Filter, Project, Sort, Aggregate, HashJoin operators

Author: poyrazK

CMakeLists.txt

@@ -131,6 +131,12 @@ if(BUILD_TESTS)
     add_cloudsql_test(multi_raft_tests tests/multi_raft_tests.cpp)
     add_cloudsql_test(distributed_txn_tests tests/distributed_txn_tests.cpp)
     add_cloudsql_test(analytics_tests tests/analytics_tests.cpp)
+    add_cloudsql_test(raft_manager_tests tests/raft_manager_tests.cpp)
+    add_cloudsql_test(raft_protocol_tests tests/raft_protocol_tests.cpp)
+    add_cloudsql_test(columnar_table_tests tests/columnar_table_tests.cpp)
+    add_cloudsql_test(storage_manager_tests tests/storage_manager_tests.cpp)
+    add_cloudsql_test(rpc_server_tests tests/rpc_server_tests.cpp)
+    add_cloudsql_test(operator_tests tests/operator_tests.cpp)
 
     add_custom_target(run-tests
         COMMAND ${CMAKE_CTEST_COMMAND}