import java.security.KeyStore
import java.security.cert.CertificateException
import java.security.cert.X509Certificate
import java.time.Duration
import java.util.Arrays
import java.util.EnumSet
import java.util.Locale
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicReference
import java.util.zip.GZIPInputStream
import javax.net.SocketFactory
import javax.net.ssl.SSLException

      .assertHeader("a\tb", "c\u007fd")
      .assertHeader("\ud83c\udf69", "\u2615\ufe0f")
      .assertHeader("", "ef")
  }

  @Test
  fun customDns() {
    // Configure a DNS that returns our local MockWebServer for android.com.
    val dns = FakeDns()
    dns["android.com"] = Dns.SYSTEM.lookup(server.url("/").host)
    client =
      client.newBuilder()
        .dns(dns)
        .build()

      .isEqualTo(lastModifiedDate)
  }

  @Test
  fun maxAgeInThePastWithDateHeaderButNoLastModifiedHeader() {
    // Chrome interprets max-age relative to the local clock. Both our cache
    // and Firefox both use the earlier of the local and server's clock.
    assertNotCached(
      MockResponse.Builder()
        .addHeader("Date: " + formatDate(-120, TimeUnit.SECONDS))
        .addHeader("Cache-Control: max-age=60")