WriteFieldUsingAlreadyWrittenMesh(fileName,f1);
f2=ReadFieldCell(fileName,f1.getMesh().getName(),-1,f1.getName(),2,7);
self.assertTrue(f2.isEqual(f1,1e-12,1e-12));
WriteFieldUsingAlreadyWrittenMesh(fileName,f1);
f2=ReadFieldCell(fileName,f1.getMesh().getName(),-1,f1.getName(),2,7);
self.assertTrue(f2.isEqual(f1,1e-12,1e-12));