uncaughtException = throwable
    }
  }

  @Synchronized fun takeUncaughtException(): Throwable? =
    uncaughtException
      .also { uncaughtException = null }

  fun ensureAllConnectionsReleased() {
    testClient?.let {
      val connectionPool = it.connectionPool

      connectionPool.evictAll()
      if (connectionPool.connectionCount() > 0) {

    assertThat(get(server.url("/")).body.string()).isEqualTo("ABCABCABC")
  }

  @Test
  fun conditionalCacheHitIsNotDoublePooled() {
    clientTestRule.ensureAllConnectionsReleased()
    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("ETag: v1")
        .body("A")
        .build(),
    )
    server.enqueue(
      MockResponse