) = apply {
    assertThat(request.headers(name)).containsExactly(*values)
  }

  fun assertCode(expectedCode: Int) =
    apply {
      assertThat(response!!.code).isEqualTo(expectedCode)
    }

  fun assertSuccessful() =
    apply {
      assertThat(failure).isNull()
      assertThat(response!!.isSuccessful).isTrue()
    }

  fun assertNotSuccessful() =
    apply {
      assertThat(response!!.isSuccessful).isFalse()