@Test
public void testReduceOutOfDiskSpace() throws Throwable {
LOG.info("testReduceOutOfDiskSpace");
Fetcher<Text,Text> underTest = new FakeFetcher<Text,Text>(job, id, ss, mm,
r, metrics, except, key, connection);
String replyHash = SecureShuffleUtils.generateHash(encHash.getBytes(), key);
ShuffleHeader header = new ShuffleHeader(map1ID.toString(), 10, 10, 1);
ByteArrayOutputStream bout = new ByteArrayOutputStream();
header.write(new DataOutputStream(bout));
ByteArrayInputStream in = new ByteArrayInputStream(bout.toByteArray());
when(connection.getResponseCode()).thenReturn(200);
when(connection.getHeaderField(ShuffleHeader.HTTP_HEADER_NAME))
.thenReturn(ShuffleHeader.DEFAULT_HTTP_HEADER_NAME);
when(connection.getHeaderField(ShuffleHeader.HTTP_HEADER_VERSION))
.thenReturn(ShuffleHeader.DEFAULT_HTTP_HEADER_VERSION);
when(connection.getHeaderField(SecureShuffleUtils.HTTP_HEADER_REPLY_URL_HASH))
.thenReturn(replyHash);
when(connection.getInputStream()).thenReturn(in);
when(mm.reserve(any(TaskAttemptID.class), anyLong(), anyInt()))
.thenThrow(new DiskErrorException("No disk space available"));
underTest.copyFromHost(host);
verify(ss).reportLocalError(any(IOException.class));
}