}

  public void testParse_maximumSizeAndMaximumWeight() {
    assertThrows(IllegalArgumentException.class, () -> parse("maximumSize=10, maximumWeight=20"));
  }

  public void testParse_concurrencyLevel() {
    CacheBuilderSpec spec = parse("concurrencyLevel=32");
    assertThat(spec.initialCapacity).isNull();
    assertThat(spec.maximumSize).isNull();
    assertThat(spec.maximumWeight).isNull();