@Test
public void testTruncateFile() throws Exception {
Log log = getLog();
// Appends 100 transactions.
appendTxns(log, new Zxid(0, 0), 100);
// Make sure latest zxid is <0, 99>.
Assert.assertEquals(new Zxid(0, 99), log.getLatestZxid());
int truncIdx = new Random().nextInt(100);
log.truncate(new Zxid(0, truncIdx));
// Make sure latest zxid is <0, truncIdx>.
Assert.assertEquals(new Zxid(0, truncIdx), log.getLatestZxid());
}
@Test
public void testGetLatestZxid() throws Exception {
Log log = getLog();
// Appends 100 transactions.
appendTxns(log, new Zxid(0, 0), 100);
// Make sure latest zxid is <0, 99>.
Assert.assertEquals(new Zxid(0, 99), log.getLatestZxid());
}
@Test
public void testTruncateAndAppend() throws Exception {
Log log = getLog();
// Appends 100 transactions.
appendTxns(log, new Zxid(0, 0), 100);
// Make sure latest zxid is <0, 99>.
Assert.assertEquals(new Zxid(0, 99), log.getLatestZxid());
// Truncates file after <0, 77>
log.truncate(new Zxid(0, 77));
// Make sure latest zxid is <0, 77>.
Assert.assertEquals(new Zxid(0, 77), log.getLatestZxid());
// Appends 22 more transactions.
appendTxns(log, new Zxid(0, 78), 22);
List<Zxid> zxids = getZxids(log, Zxid.ZXID_NOT_EXIST);
// Make sure latest zxid is <0, 99>
Assert.assertEquals(new Zxid(0, 99), log.getLatestZxid());
// Check all the transactions are in log.
Assert.assertEquals(100, zxids.size());
}
@Test(expected = RuntimeException.class)
public void testCorruptTxn() throws Exception {
if (logClass == (Class<?>) SimpleLog.class) {
Log log = getLog();
appendTxns(log, new Zxid(0, 0), 1);
// Corrupts Transaction.
corruptFile(20);
// Iterating the log will trigger the checksum error.
log.getIterator(log.getLatestZxid());
log.close();
} else {
throw new RuntimeException("Simulated exception for RollingLog.");
}
}