testAutosave()
testCacheMiss()
testIsComplete()
testCleanContents()
testGetForStorage()
testParentCompleteIsUsedDuringHas()
testFlush()
testSetFromStorage()
testGetMetadataFail()
metaGetterProvider()
testMetaGetters( $method, $key, $value)
testGetDerivedMimetype()
testCopyFail()
testStoreContents()
testDelete()
testDeleteDir()
testReadStream()
testRename()
testCopy()
testComplextListContents()
testComplextListContentsWithDeletedFile()
testCacheMissIfContentsIsFalse()