@Test
public void returnsNextReaderKeyExcludingCurrent() {

    // given
    CharSequence expectedFirstKey = getNextExpectedKey(RESERVED_KEYS + 1);
    CharSequence expectedSecondKey = getNextExpectedKey(RESERVED_KEYS + 2);
    KeySequenceConfig config = createDefaultTestWriterIndexConfig(RESERVED_KEYS + 2);
    KeySequence sequence = createDefaultTestUUIDSequence(config);
    // when
    CharSequence key1 = sequence.nextReaderKey();
    CharSequence key2 = sequence.nextReaderKey();
    // then
    assertEquals(expectedFirstKey, key1);
    assertEquals(expectedSecondKey, key2);
}