var result = headerValue
  if (result == null) {
    result =
      buildString {
        if (noCache) append("no-cache, ")
        if (noStore) append("no-store, ")
        if (maxAgeSeconds != -1) append("max-age=").append(maxAgeSeconds).append(", ")
        if (sMaxAgeSeconds != -1) append("s-maxage=").append(sMaxAgeSeconds).append(", ")
        if (isPrivate) append("private, ")
        if (isPublic) append("public, ")

        "no-transform, immutable",
    )
    assertThat(cacheControl.noCache).isTrue()
    assertThat(cacheControl.noStore).isTrue()
    assertThat(cacheControl.maxAgeSeconds).isEqualTo(1)
    assertThat(cacheControl.maxStaleSeconds).isEqualTo(2)
    assertThat(cacheControl.minFreshSeconds).isEqualTo(3)
    assertThat(cacheControl.onlyIfCached).isTrue()

    assertThat(cacheControl.toString()).isEqualTo("")
    assertThat(cacheControl.noCache).isFalse()
    assertThat(cacheControl.noStore).isFalse()
    assertThat(cacheControl.maxAgeSeconds).isEqualTo(-1)
    assertThat(cacheControl.sMaxAgeSeconds).isEqualTo(-1)
    assertThat(cacheControl.isPrivate).isFalse()
    assertThat(cacheControl.isPublic).isFalse()
    assertThat(cacheControl.mustRevalidate).isFalse()