Support getting specific entry number in reflog

The number specified is interpreted as relative to the
last entry in the reflog.

Change-Id: Ie4dd03370bb0d475a0e89d3015113ca98920100f

1 files changed, 36 insertions, 0 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/ReflogReaderTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/ReflogReaderTest.java
index c0cc0c3b7a..f3a6914bee 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/ReflogReaderTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/ReflogReaderTest.java
@@ -229,6 +229,42 @@ public class ReflogReaderTest extends SampleDataRepositoryTestCase {
 		assertEquals("new/work", checkout.getFromBranch());
 	}
 
+	@Test
+	public void testSpecificEntryNumber() throws Exception {
+		setupReflog("logs/refs/heads/master", twoLine);
+
+		ReflogReader reader = new ReflogReader(db, "refs/heads/master");
+		ReflogEntry e = reader.getReverseEntry(0);
+		assertEquals(
+				ObjectId.fromString("c6734895958052a9dbc396cff4459dc1a25029ab"),
+				e.getOldId());
+		assertEquals(
+				ObjectId.fromString("54794942a18a237c57a80719afed44bb78172b10"),
+				e.getNewId());
+		assertEquals("Same A U Thor", e.getWho().getName());
+		assertEquals("same.author@example.com", e.getWho().getEmailAddress());
+		assertEquals(60, e.getWho().getTimeZoneOffset());
+		assertEquals("2009-05-22T22:36:42", iso(e.getWho()));
+		assertEquals(
+				"rebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d",
+				e.getComment());
+
+		e = reader.getReverseEntry(1);
+		assertEquals(
+				ObjectId.fromString("0000000000000000000000000000000000000000"),
+				e.getOldId());
+		assertEquals(
+				ObjectId.fromString("c6734895958052a9dbc396cff4459dc1a25029ab"),
+				e.getNewId());
+		assertEquals("A U Thor", e.getWho().getName());
+		assertEquals("thor@committer.au", e.getWho().getEmailAddress());
+		assertEquals(-60, e.getWho().getTimeZoneOffset());
+		assertEquals("2009-05-22T20:36:41", iso(e.getWho()));
+		assertEquals("branch: Created from rr/renamebranchv4", e.getComment());
+
+		assertNull(reader.getReverseEntry(3));
+	}
+
 	private void setupReflog(String logName, byte[] data)
 			throws FileNotFoundException, IOException {
 				File logfile = new File(db.getDirectory(), logName);