}
  }

  @Test fun ofMapThrowsOnBlankName() {
    assertFailsWith<IllegalArgumentException> {
      mapOf(" " to "OkHttp").toHeaders()
    }
  }

  @Test fun ofMapAcceptsEmptyValue() {
    val headers = mapOf("User-Agent" to "").toHeaders()
    assertThat(headers.value(0)).isEqualTo("")
  }

  @Test fun ofMapTrimsKey() {
    val headers = mapOf(" User-Agent " to "OkHttp").toHeaders()