.assertHeader("Donut", "b")
      .assertRequestHeader("Accept-Language", "en-US")
      .assertRequestHeader("Accept-Charset", "UTF-8")
      .assertRequestHeader("If-None-Match", "v1") // If-None-Match in the validation request.
      .assertSentRequestAtMillis(request2SentAt, request2ReceivedAt)
      .assertReceivedResponseAtMillis(request2SentAt, request2ReceivedAt)
  }

  @Test
  fun conditionalCacheHit_Async() {

// in addition I->O. BO->BI mismatch cannot be independently created without
// breaking one of these mismatches. That gives us 4x2 tests. In addition
// condition result needs to be tensor<i1>, for which we have 3
// additional validation tests. All these tests are based on the following
// valid while

func.func @testInvalidTestValidBase(%arg0 : tensor<i32>) -> (tensor<i32>) {
  %0 = "tf.WhileRegion"(%arg0) (
    {