@Test
public void testCollectionWithGarbage() throws Exception {
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit0);
assertTrue("commit0 reachable", isReachable(repo, commit0));
assertFalse("commit1 garbage", isReachable(repo, commit1));
gcNoTtl();
assertEquals(2, odb.getPacks().length);
DfsPackFile gc = null;
DfsPackFile garbage = null;
for (DfsPackFile pack : odb.getPacks()) {
DfsPackDescription d = pack.getPackDescription();
if (d.getPackSource() == GC) {
gc = pack;
} else if (d.getPackSource() == UNREACHABLE_GARBAGE) {
garbage = pack;
} else {
fail("unexpected " + d.getPackSource());
}
}
assertNotNull("created GC pack", gc);
assertTrue(isObjectInPack(commit0, gc));
assertNotNull("created UNREACHABLE_GARBAGE pack", garbage);
assertTrue(isObjectInPack(commit1, garbage));
}
private int countPacks(PackSource source) throws IOException {
int cnt = 0;
for (DfsPackFile pack : odb.getPacks()) {
if (pack.getPackDescription().getPackSource() == source) {
cnt++;
}
}
return cnt;
}
@Test
public void testCollectionWithGarbageAndGarbagePacksPurged() throws Exception {
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit0);
gcNoTtl();
gcWithTtl();
// The repository has an UNREACHABLE_GARBAGE pack that could have
// expired, but since we never purge the most recent UNREACHABLE_GARBAGE
// pack, it must have survived the GC.
boolean commit1Found = false;
for (DfsPackFile pack : odb.getPacks()) {
DfsPackDescription d = pack.getPackDescription();
if (d.getPackSource() == GC) {
assertTrue("has commit0", isObjectInPack(commit0, pack));
assertFalse("no commit1", isObjectInPack(commit1, pack));
} else if (d.getPackSource() == UNREACHABLE_GARBAGE) {
commit1Found |= isObjectInPack(commit1, pack);
} else {
fail("unexpected " + d.getPackSource());
}
}
assertTrue("garbage commit1 still readable", commit1Found);
// Find oldest UNREACHABLE_GARBAGE; it will be pruned by next GC.
DfsPackDescription oldestGarbagePack = null;
for (DfsPackFile pack : odb.getPacks()) {
DfsPackDescription d = pack.getPackDescription();
if (d.getPackSource() == UNREACHABLE_GARBAGE) {
oldestGarbagePack = oldestPack(oldestGarbagePack, d);
}
}
assertNotNull("has UNREACHABLE_GARBAGE", oldestGarbagePack);
gcWithTtl();
assertTrue("has packs", odb.getPacks().length > 0);
for (DfsPackFile pack : odb.getPacks()) {
assertNotEquals(oldestGarbagePack, pack.getPackDescription());
}
}
@Test
public void testCollectionWithNoGarbage() throws Exception {
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit1);
assertTrue("commit0 reachable", isReachable(repo, commit0));
assertTrue("commit1 reachable", isReachable(repo, commit1));
// Packs start out as INSERT.
assertEquals(2, odb.getPacks().length);
for (DfsPackFile pack : odb.getPacks()) {
assertEquals(INSERT, pack.getPackDescription().getPackSource());
}
gcNoTtl();
// Single GC pack present with all objects.
assertEquals(1, odb.getPacks().length);
DfsPackFile pack = odb.getPacks()[0];
assertEquals(GC, pack.getPackDescription().getPackSource());
assertTrue("commit0 in pack", isObjectInPack(commit0, pack));
assertTrue("commit1 in pack", isObjectInPack(commit1, pack));
}
private void run(DfsGarbageCollector gc) throws IOException {
assertTrue("gc repacked", gc.pack(null));
odb.clearCache();
}