assertThat(selection2.hasNext()).isFalse()

    // The second selection will contain all failed routes.
    val selection3 = routeSelector.next()
    assertThat(selection3.next()).isEqualTo(regularRoutes[0])
    assertThat(selection3.hasNext()).isFalse()
    assertThat(routeSelector.hasNext()).isFalse()
  }

  @Test fun failedRouteWithMultipleProxies() {

@Tag("Slowish")
class RelayTest {
  @TempDir
  var tempDir: File? = null
  private val executor = Executors.newCachedThreadPool(threadFactory("RelayTest"))
  private val metadata: ByteString = "great metadata!".encodeUtf8()
  private lateinit var file: File

  @BeforeEach
  fun setUp() {
    file = File(tempDir, "test")
  }

  @AfterEach
  fun tearDown() {
    executor.shutdown()
  }

import assertk.assertions.doesNotContain
import assertk.assertions.hasMessage
import assertk.assertions.isCloseTo
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isLessThan
import assertk.assertions.isNotEmpty
import assertk.assertions.isNotNull
import assertk.assertions.isNotSameAs
import assertk.assertions.isNull
import assertk.assertions.isTrue

    assertThat(filesystem.exists(getCleanFile("g1", 0))).isFalse()
    assertThat(filesystem.exists(getCleanFile("g1", 1))).isFalse()
    assertThat(filesystem.exists(getCleanFile("g2", 0))).isFalse()
    assertThat(filesystem.exists(getCleanFile("g2", 1))).isFalse()
    assertThat(filesystem.exists(cacheDir / "otherFile0")).isFalse()
    assertThat(filesystem.exists(cacheDir / "dir1")).isFalse()
  }

  private operator fun set(