--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-fastannotate-corrupt.t	Mon Jul 30 22:50:00 2018 -0400
@@ -0,0 +1,83 @@
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > fastannotate=
+  > EOF
+
+  $ hg init repo
+  $ cd repo
+  $ for i in 0 1 2 3 4; do
+  >   echo $i >> a
+  >   echo $i >> b
+  >   hg commit -A -m $i a b
+  > done
+
+use the "debugbuildannotatecache" command to build annotate cache at rev 0
+
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=0
+  fastannotate: a: 1 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+"debugbuildannotatecache" should work with broken cache (and other files would
+be built without being affected). note: linelog being broken is only noticed
+when we try to append to it.
+
+  $ echo 'CORRUPT!' >> .hg/fastannotate/default/a.m
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=1
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 2 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ echo 'CANNOT REUSE!' > .hg/fastannotate/default/a.l
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=2
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 3 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ rm .hg/fastannotate/default/a.m
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=3
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 4 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ rm .hg/fastannotate/default/a.l
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=3
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=4
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 5 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+"fastannotate" should deal with file corruption as well
+
+  $ rm -rf .hg/fastannotate
+  $ hg fastannotate --debug -r 0 a
+  fastannotate: a: 1 new changesets in the main branch
+  0: 0
+
+  $ echo 'CORRUPT!' >> .hg/fastannotate/default/a.m
+  $ hg fastannotate --debug -r 0 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 1 new changesets in the main branch
+  0: 0
+
+  $ echo 'CORRUPT!' > .hg/fastannotate/default/a.l
+  $ hg fastannotate --debug -r 1 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 2 new changesets in the main branch
+  0: 0
+  1: 1
+
+  $ rm .hg/fastannotate/default/a.l
+  $ hg fastannotate --debug -r 1 a
+  fastannotate: a: using fast path (resolved fctx: True)
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 2 new changesets in the main branch
+  0: 0
+  1: 1
+
+  $ rm .hg/fastannotate/default/a.m
+  $ hg fastannotate --debug -r 2 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 3 new changesets in the main branch
+  0: 0
+  1: 1
+  2: 2