fieldInfos.add(testDoc);
//Since the complement is stored as well in the fields map
assertTrue(fieldInfos.size() == 7); //this is 7 b/c we are using the no-arg constructor
RAMDirectory dir = new RAMDirectory();
String name = "testFile";
OutputStream output = dir.createFile(name);
assertTrue(output != null);
//Use a RAMOutputStream
try {
fieldInfos.write(output);