assertThat(request.headers["If-Modified-Since"]).isEqualTo(ifModifiedSinceDate)
    assertThat(request.headers["If-None-Match"]).isNull()
  }

  @Test
  fun clientSuppliedIfNoneMatchSinceWithCachedResult() {
    val lastModifiedDate = formatDate(-3, TimeUnit.MINUTES)
    val response =
      MockResponse
        .Builder()
        .addHeader("Last-Modified: $lastModifiedDate")