Test readonly attributes of File. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". webkitRequestFileSystem(TEMPORARY, 100, fileSystemCallback, errorCallback); removeAllInDirectory(fileSystem.root, createTestFile, errorCallback); fileSystem.root.getFile(testFileName, {create:true}, getFileFromEntry, errorCallback); testFileEntry.file(fileCallback, errorCallback); trying to set readonly property testFile.size testFile.size = 1 PASS testFile.size is still 0 trying to set readonly property testFile.type testFile.type = 'application/octet-stream' PASS testFile.type is still text/plain trying to set readonly property testFile.name testFile.name = 'bar' PASS testFile.name is still testFileEntry.txt PASS successfullyParsed is true TEST COMPLETE