TEST(QueryProjectionTest, ExclusionProjectionDoesNotPreserveField) {
    auto proj = createProjection("{}", "{a: 0}");
    ASSERT_FALSE(proj.isFieldRetainedExactly("a"));
}
TEST(QueryProjectionTest, ExclusionProjectionDoesNotPreserveField) {
    auto proj = createProjection("{}", "{a: 0}");
    ASSERT_FALSE(proj.isFieldRetainedExactly("a"));
}