271   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
275   O->pushOverlay(Upper);  in TEST()
291   Upper->addSymlink("/upper_link");  in TEST()
337   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
340   O->pushOverlay(Upper);  in TEST()
343   Upper->addDirectory("/upper-only");  in TEST()
352   Status1 = Upper->status("/upper-only");  in TEST()
362   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
365   O->pushOverlay(Upper);  in TEST()
369   Upper->addDirectory("/both", sys::fs::owner_all | sys::fs::group_read);  in TEST()
376   Upper->addRegularFile("/both/bar", sys::fs::owner_write);  in TEST()
388   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
392   O->pushOverlay(Upper);  in TEST()
743   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
746   O->pushOverlay(Upper);  in TEST()
754   Upper->addRegularFile("/file2");  in TEST()
759   Upper->addDirectory("/dir2");  in TEST()
760   Upper->addRegularFile("/dir2/foo");  in TEST()
768   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
772   O->pushOverlay(Upper);  in TEST()
782   Upper->addDirectory("/dir");  in TEST()
783   Upper->addRegularFile("/dir/file2");  in TEST()
796   Upper->addDirectory("/dir2");  in TEST()
797   Upper->addRegularFile("/dir2/foo");  in TEST()
798   Upper->addRegularFile("/hiddenByUp");  in TEST()
810   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
814   O->pushOverlay(Upper);  in TEST()
823   Upper->addRegularFile("/file3");  in TEST()
830   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
834   O->pushOverlay(Upper);  in TEST()
843   Upper->addRegularFile("/onlyInUp");  in TEST()
844   Upper->addRegularFile("/hiddenByUp");  in TEST()