source1.close()
    source2.close()
    assertThat(relay.isClosed).isTrue()
    assertFile(Relay.PREFIX_CLEAN, 10L, metadata.size, "abcdefghij", metadata)
  }

  @Test
  fun readFromFile() {
    val upstream = Buffer()
    upstream.writeUtf8("abcdefghijklmnopqrst")
    val relay = edit(file, upstream, metadata, 5)
    val source1 = relay.newSource()!!.buffer()