test-largefiles: demonstrate problems with renaming and reverting a directory

These things were uncovered looking at issue5738.

First, if the destination directory exists under .hglf, the source is moved
under the destination instead of renaming the last component for `hg mv srcdir
dstdir`.  This is extra confusing, because it occurs even if the user visible
destination (i.e. the path _not_ under .hglf) does not exist.

Additionally, when a largefile is forgotten via revert, any modifications end up
getting clobbered.  For normal files, the forgotten file is left unchanged, as
shown by test-import.t.  The forget command on a largefile will correctly leave
the file unmodified.

tests/test-import.t

@@ -972,6 +972,7 b' test import with similarity and git and '
   adding b
   recording removal of a as rename to b (88% similar)
   applied to working directory
+  $ echo 'mod b' > b
   $ hg st -C
   A b
     a
@@ -979,6 +980,8 b' test import with similarity and git and '
   $ hg revert -a
   undeleting a
   forgetting b
+  $ cat b
+  mod b
   $ rm b
   $ hg import --no-commit -v -s 100 ../rename.diff -p2
   applying ../rename.diff

tests/test-largefiles-misc.t

@@ -390,8 +390,12 b' Test update with subrepos.'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status -S
 
+Forget doesn't change the content of the file
+  $ echo 'pre-forget content' > subrepo/large.txt
   $ hg forget -v subrepo/large.txt
   removing subrepo/large.txt (glob)
+  $ cat subrepo/large.txt
+  pre-forget content
 
 Test reverting a forgotten file
   $ hg revert -R subrepo subrepo/large.txt
@@ -1060,7 +1064,9 b' largefiles (issue4547)'
   > largefiles=
   > EOF
   $ echo large > subrepo-root/large
-  $ hg -R subrepo-root add --large subrepo-root/large
+  $ mkdir -p subrepo-root/dir/subdir
+  $ echo large2 > subrepo-root/dir/subdir/large.bin
+  $ hg -R subrepo-root add --large subrepo-root/large subrepo-root/dir/subdir/large.bin
   $ hg clone -q no-largefiles subrepo-root/no-largefiles
   $ cat > subrepo-root/.hgsub <<EOF
   > no-largefiles = no-largefiles
@@ -1069,6 +1075,7 b' largefiles (issue4547)'
   $ hg -R subrepo-root commit -m '#0'
   Invoking status precommit hook
   A .hgsub
+  A dir/subdir/large.bin
   A large
   ? .hgsubstate
   $ echo dirty >> subrepo-root/large
@@ -1085,8 +1092,163 b' largefiles (issue4547)'
   reverting subrepo no-largefiles
   reverting subrepo-root/no-largefiles/normal1 (glob)
 
-  $ cd ..
+Move (and then undo) a directory move with only largefiles.
+
+  $ listtree() {
+  >   find $@ \( -type d -printf "%p/\n" -o -type f -printf "%p\n" \) \
+  >           -a -name .hg -prune | sort
+  > }
+
+  $ cd subrepo-root
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir/
+  .hglf/dir/subdir/
+  .hglf/dir/subdir/large.bin
+  .hglf/large
+  dir/
+  dir/subdir/
+  dir/subdir/large.bin
+  large
+  large.orig
+
+  $ hg mv dir/subdir dir/subdir2
+  moving .hglf/dir/subdir/large.bin to .hglf/dir/subdir2/large.bin (glob)
+
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir/
+  .hglf/dir/subdir2/
+  .hglf/dir/subdir2/large.bin
+  .hglf/large
+  dir/
+  dir/subdir2/
+  dir/subdir2/large.bin
+  large
+  large.orig
+  $ hg status -C
+  A dir/subdir2/large.bin
+    dir/subdir/large.bin
+  R dir/subdir/large.bin
+  ? large.orig
+
+  $ echo 'modified' > dir/subdir2/large.bin
+  $ hg status -C
+  A dir/subdir2/large.bin
+    dir/subdir/large.bin
+  R dir/subdir/large.bin
+  ? large.orig
+
+  $ hg revert --all
+  undeleting .hglf/dir/subdir/large.bin (glob)
+  forgetting .hglf/dir/subdir2/large.bin (glob)
+  reverting subrepo no-largefiles
+
+  $ hg status -C
+  ? dir/subdir2/large.bin
+  ? large.orig
+
+BUG: The content of the forgotten file shouldn't be clobbered
+
+  $ cat dir/subdir2/large.bin
+  large2
+
+BUG: the standin for subdir2 should be deleted, not just dropped
+
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir/
+  .hglf/dir/subdir/
+  .hglf/dir/subdir/large.bin
+  .hglf/dir/subdir2/
+  .hglf/dir/subdir2/large.bin
+  .hglf/large
+  dir/
+  dir/subdir/
+  dir/subdir/large.bin
+  dir/subdir2/
+  dir/subdir2/large.bin
+  large
+  large.orig
 
+  $ rm -r dir/subdir2
+
+BUG: subdir should not be in the destination.  This is caused by the directory
+existing under .hglf/.
+  $ hg mv dir/subdir dir/subdir2
+  moving .hglf/dir/subdir/large.bin to .hglf/dir/subdir2/subdir/large.bin (glob)
+
+  $ hg status -C
+  A dir/subdir2/subdir/large.bin
+    dir/subdir/large.bin
+  R dir/subdir/large.bin
+  ? large.orig
+
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir/
+  .hglf/dir/subdir2/
+  .hglf/dir/subdir2/large.bin
+  .hglf/dir/subdir2/subdir/
+  .hglf/dir/subdir2/subdir/large.bin
+  .hglf/large
+  dir/
+  dir/subdir2/
+  dir/subdir2/subdir/
+  dir/subdir2/subdir/large.bin
+  large
+  large.orig
+
+Start from scratch, and rename something other than the final path component.
+
+  $ hg up -qC .
+  $ hg --config extensions.purge= purge
+
+  $ hg mv dir/subdir dir2/subdir
+  moving .hglf/dir/subdir/large.bin to .hglf/dir2/subdir/large.bin (glob)
+
+  $ hg status -C
+  A dir2/subdir/large.bin
+    dir/subdir/large.bin
+  R dir/subdir/large.bin
+
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir2/
+  .hglf/dir2/subdir/
+  .hglf/dir2/subdir/large.bin
+  .hglf/large
+  dir2/
+  dir2/subdir/
+  dir2/subdir/large.bin
+  large
+
+  $ hg revert --all
+  undeleting .hglf/dir/subdir/large.bin (glob)
+  forgetting .hglf/dir2/subdir/large.bin (glob)
+  reverting subrepo no-largefiles
+
+  $ hg status -C
+  ? dir2/subdir/large.bin
+
+  $ listtree .hglf dir* large*
+  .hglf/
+  .hglf/dir/
+  .hglf/dir/subdir/
+  .hglf/dir/subdir/large.bin
+  .hglf/dir2/
+  .hglf/dir2/subdir/
+  .hglf/dir2/subdir/large.bin
+  .hglf/large
+  dir/
+  dir/subdir/
+  dir/subdir/large.bin
+  dir2/
+  dir2/subdir/
+  dir2/subdir/large.bin
+  large
+
+  $ cd ../..
 
 Test "pull --rebase" when rebase is enabled before largefiles (issue3861)
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