}

  public void testParse_initialCapacityRepeated() {
    assertThrows(
        IllegalArgumentException.class, () -> parse("initialCapacity=10, initialCapacity=20"));
  }

  public void testParse_maximumSize() {
    CacheBuilderSpec spec = parse("maximumSize=9000");
    assertThat(spec.initialCapacity).isNull();
    assertThat(spec.maximumSize).isEqualTo(9000L);
    assertThat(spec.concurrencyLevel).isNull();