198   IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());  in TEST()  local
202   O->pushOverlay(Middle);  in TEST()
215   Middle->addRegularFile("/foo");  in TEST()
216   StatusM = Middle->status("/foo");  in TEST()
420   IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());  in TEST()  local
424   O->pushOverlay(Middle);  in TEST()
444   Middle->addDirectory("/a");  in TEST()
445   Middle->addDirectory("/a/b");  in TEST()
446   Middle->addDirectory("/a/b/c");  in TEST()
447   Middle->addRegularFile("/a/b/c/d");  in TEST()
448   Middle->addRegularFile("/hiddenByUp");  in TEST()
462   IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());  in TEST()  local
466   O->pushOverlay(Middle);  in TEST()
472   Middle->addRegularFile("/file2");  in TEST()
482   IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());  in TEST()  local
486   O->pushOverlay(Middle);  in TEST()
493   Middle->addRegularFile("/onlyInMid", sys::fs::owner_write);  in TEST()
494   Middle->addRegularFile("/hiddenByMid", sys::fs::owner_write);  in TEST()
495   Middle->addRegularFile("/hiddenByUp", sys::fs::owner_write);  in TEST()