val response = call.execute()
    response.close()
    assertThat(response.header("Alpha")).isEqualTo("α")
    assertThat(response.header("β")).isEqualTo("Beta")
  }

  @Test
  fun serverSendsPushPromise_GET() {
    val pushPromise =
      PushPromise(
        "GET",
        "/foo/bar",
        headersOf("foo", "bar"),
        MockResponse(body = "bar"),
      )
    server.enqueue(