@Test
void defaultsToVersion1Reader() throws IOException {

    String firstLine = "null";
    FileUtils.writeStringToFile(balanceFile, firstLine, "utf-8");
    when(readerImplV2.isFirstLineFromFileVersion(firstLine)).thenReturn(false);
    compositeBalanceFileReader.read(balanceFile);
    verify(readerImplV1, times(1)).read(balanceFile);
    verify(readerImplV2, times(0)).read(balanceFile);
}