TEST(QueryProjectionTest, MakeEmptyProjectionExcludeId) {
    Projection proj(createProjection("{}", "{_id: 0}"));
    ASSERT_TRUE(proj.requiresDocument());
}
TEST(QueryProjectionTest, MakeEmptyProjectionExcludeId) {
    Projection proj(createProjection("{}", "{_id: 0}"));
    ASSERT_TRUE(proj.requiresDocument());
}