@Test public void randomLong_whenRandomIsMostNegative() {

  mockStatic(System.class);
  when(System.currentTimeMillis()).thenReturn(1465510280_000L);
  long traceIdHigh = Platform.nextTraceIdHigh(0xffffffff);
  assertThat(HexCodec.toLowerHex(traceIdHigh))
    .isEqualTo("5759e988ffffffff");
}