@Test
public void emptyFormatMessageLeavesTheSame() {

  String message = "01-23 12:34:56.789      1234-56/com.dummy.test D/test: Test message";
  assertEquals("", myPreferences.LOGCAT_FORMAT_STRING);
  String formattedMessage = myFormatter.formatMessage(message);
  assertEquals(message, formattedMessage);
}