File file = accessor.getDataStore().getDataFile(date);
writeData(element, date, file);
Collection<T> data = accessor.getData(date, date);
assertThat(data.size(), is(1));
WorkspaceStorage ws = new WorkspaceStorage(new Path(
file.getParentFile().getAbsolutePath()), currentWorkspacePath());
assertValues(element, date, ws, data.iterator().next());
}