235   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
238   O->pushOverlay(Upper);  in TEST()
241   Upper->addDirectory("/upper-only");  in TEST()
250   Status1 = Upper->status("/upper-only");  in TEST()
260   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
263   O->pushOverlay(Upper);  in TEST()
267   Upper->addDirectory("/both", sys::fs::owner_all | sys::fs::group_read);  in TEST()
274   Upper->addRegularFile("/both/bar", sys::fs::owner_write);  in TEST()
396   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
399   O->pushOverlay(Upper);  in TEST()
407   Upper->addRegularFile("/file2");  in TEST()
415   Upper->addDirectory("/dir2");  in TEST()
416   Upper->addRegularFile("/dir2/foo");  in TEST()
427   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
431   O->pushOverlay(Upper);  in TEST()
441   Upper->addDirectory("/dir");  in TEST()
442   Upper->addRegularFile("/dir/file2");  in TEST()
458   Upper->addDirectory("/dir2");  in TEST()
459   Upper->addRegularFile("/dir2/foo");  in TEST()
460   Upper->addRegularFile("/hiddenByUp");  in TEST()
475   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
479   O->pushOverlay(Upper);  in TEST()
488   Upper->addRegularFile("/file3");  in TEST()
498   IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());  in TEST()  local
502   O->pushOverlay(Upper);  in TEST()
511   Upper->addRegularFile("/onlyInUp", sys::fs::owner_all);  in TEST()
512   Upper->addRegularFile("/hiddenByUp", sys::fs::owner_all);  in TEST()