--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-fastannotate-renames.t	Mon Jul 30 22:50:00 2018 -0400
@@ -0,0 +1,168 @@
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > fastannotate=
+  > [fastannotate]
+  > mainbranch=main
+  > EOF
+
+  $ hg init repo
+  $ cd repo
+
+add or rename files on top of the master branch
+
+  $ echo a1 > a
+  $ echo b1 > b
+  $ hg commit -qAm 1
+  $ hg bookmark -i main
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: 1 new changesets in the main branch
+  0 b: b1
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: 1 new changesets in the main branch
+  0 a: a1
+  $ echo a2 >> a
+  $ cat > b << EOF
+  > b0
+  > b1
+  > EOF
+  $ hg mv a t
+  $ hg mv b a
+  $ hg mv t b
+  $ hg commit -m 'swap names'
+
+existing linelogs are not helpful with such renames in side branches
+
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: linelog cannot help in annotating this revision
+  1 a: b0
+  0 b: b1
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: linelog cannot help in annotating this revision
+  0 a: a1
+  1 b: a2
+
+move main branch forward, rebuild should happen
+
+  $ hg bookmark -i main -r . -q
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: cache broken and deleted
+  fastannotate: b: 2 new changesets in the main branch
+  0 a: a1
+  1 b: a2
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: using fast path (resolved fctx: True)
+  0 a: a1
+  1 b: a2
+
+for rev 0, the existing linelog is still useful for a, but not for b
+
+  $ hg fastannotate --debug -nf a -r 0
+  fastannotate: a: using fast path (resolved fctx: True)
+  0 a: a1
+  $ hg fastannotate --debug -nf b -r 0
+  fastannotate: b: linelog cannot help in annotating this revision
+  0 b: b1
+
+a rebuild can also be triggered if "the main branch last time" mismatches
+
+  $ echo a3 >> a
+  $ hg commit -m a3
+  $ cat >> b << EOF
+  > b3
+  > b4
+  > EOF
+  $ hg commit -m b4
+  $ hg bookmark -i main -q
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 3 new changesets in the main branch
+  1 a: b0
+  0 b: b1
+  2 a: a3
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: using fast path (resolved fctx: True)
+  1 a: b0
+  0 b: b1
+  2 a: a3
+
+linelog can be updated without being helpful
+
+  $ hg mv a t
+  $ hg mv b a
+  $ hg mv t b
+  $ hg commit -m 'swap names again'
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: 1 new changesets in the main branch
+  1 a: b0
+  0 b: b1
+  2 a: a3
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: linelog cannot help in annotating this revision
+  1 a: b0
+  0 b: b1
+  2 a: a3
+
+move main branch forward again, rebuilds are one-time
+
+  $ hg bookmark -i main -q
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 4 new changesets in the main branch
+  0 a: a1
+  1 b: a2
+  3 b: b3
+  3 b: b4
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: cache broken and deleted
+  fastannotate: b: 4 new changesets in the main branch
+  1 a: b0
+  0 b: b1
+  2 a: a3
+  $ hg fastannotate --debug -nf a
+  fastannotate: a: using fast path (resolved fctx: True)
+  0 a: a1
+  1 b: a2
+  3 b: b3
+  3 b: b4
+  $ hg fastannotate --debug -nf b
+  fastannotate: b: using fast path (resolved fctx: True)
+  1 a: b0
+  0 b: b1
+  2 a: a3
+
+list changeset hashes to improve readability
+
+  $ hg log -T '{rev}:{node}\n'
+  4:980e1ab8c516350172928fba95b49ede3b643dca
+  3:14e123fedad9f491f5dde0beca2a767625a0a93a
+  2:96495c41e4c12218766f78cdf244e768d7718b0f
+  1:35c2b781234c994896aba36bd3245d3104e023df
+  0:653e95416ebb5dbcc25bbc7f75568c9e01f7bd2f
+
+annotate a revision not in the linelog. linelog cannot be used, but does not get rebuilt either
+
+  $ hg fastannotate --debug -nf a -r 96495c41e4c12218766f78cdf244e768d7718b0f
+  fastannotate: a: linelog cannot help in annotating this revision
+  1 a: b0
+  0 b: b1
+  2 a: a3
+  $ hg fastannotate --debug -nf a -r 2
+  fastannotate: a: linelog cannot help in annotating this revision
+  1 a: b0
+  0 b: b1
+  2 a: a3
+  $ hg fastannotate --debug -nf a -r .
+  fastannotate: a: using fast path (resolved fctx: True)
+  0 a: a1
+  1 b: a2
+  3 b: b3
+  3 b: b4
+
+annotate an ancient revision where the path matches. linelog can be used
+
+  $ hg fastannotate --debug -nf a -r 0
+  fastannotate: a: using fast path (resolved fctx: True)
+  0 a: a1
+  $ hg fastannotate --debug -nf a -r 653e95416ebb5dbcc25bbc7f75568c9e01f7bd2f
+  fastannotate: a: using fast path (resolved fctx: False)
+  0 a: a1