tests: don't rely on broken behaviour in test-largefiles-cache.t

The test relied on the bug that 'pull largefiles from branchheads' didn't pull
any largefiles from tip revision when it seemed like no largefiles had been
checked out before.

tests/test-largefiles-cache.t

@@ -1,123 +1,127 b''
 Create user cache directory
 
   $ USERCACHE=`pwd`/cache; export USERCACHE
   $ cat <<EOF >> ${HGRCPATH}
   > [extensions]
   > hgext.largefiles=
   > [largefiles]
   > usercache=${USERCACHE}
   > EOF
   $ mkdir -p ${USERCACHE}
 
 Create source repo, and commit adding largefile.
 
   $ hg init src
   $ cd src
   $ echo large > large
   $ hg add --large large
   $ hg commit -m 'add largefile'
+  $ hg rm large
+  $ hg commit -m 'branchhead without largefile'
+  $ hg up -qr 0
   $ cd ..
 
 Discard all cached largefiles in USERCACHE
 
   $ rm -rf ${USERCACHE}
 
 Create mirror repo, and pull from source without largefile:
 "pull" is used instead of "clone" for suppression of (1) updating to
 tip (= cahcing largefile from source repo), and (2) recording source
 repo as "default" path in .hg/hgrc.
 
   $ hg init mirror
   $ cd mirror
   $ hg pull ../src
   pulling from ../src
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
-  added 1 changesets with 1 changes to 1 files
+  added 2 changesets with 1 changes to 1 files
   (run 'hg update' to get a working copy)
   caching new largefiles
   0 largefiles cached
 
 Update working directory to "tip", which requires largefile("large"),
 but there is no cache file for it.  So, hg must treat it as
 "missing"(!) file.
 
-  $ hg update
+  $ hg update -r0
   getting changed largefiles
   error getting id 7f7097b041ccf68cc5561e9600da4655d21c6d18 from url file:$TESTTMP/mirror for file large: can't get file locally (glob)
   0 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status
   ! large
 
 Update working directory to null: this cleanup .hg/largefiles/dirstate
 
   $ hg update null
   getting changed largefiles
   0 largefiles updated, 0 removed
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
 Update working directory to tip, again.
 
-  $ hg update
+  $ hg update -r0
   getting changed largefiles
   error getting id 7f7097b041ccf68cc5561e9600da4655d21c6d18 from url file:$TESTTMP/mirror for file large: can't get file locally (glob)
   0 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status
   ! large
   $ cd ..
 
 #if unix-permissions
 
 Portable way to print file permissions:
 
   $ cat > ls-l.py <<EOF
   > #!/usr/bin/env python
   > import sys, os
   > path = sys.argv[1]
   > print '%03o' % (os.lstat(path).st_mode & 0777)
   > EOF
   $ chmod +x ls-l.py
 
 Test that files in .hg/largefiles inherit mode from .hg/store, not
 from file in working copy:
 
   $ cd src
   $ chmod 750 .hg/store
   $ chmod 660 large
   $ echo change >> large
   $ hg commit -m change
+  created new head
   $ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
   640
 
 Test permission of with files in .hg/largefiles created by update:
 
   $ cd ../mirror
   $ rm -r "$USERCACHE" .hg/largefiles # avoid links
   $ chmod 750 .hg/store
   $ hg pull ../src --update -q
   $ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
   640
 
 Test permission of files created by push:
 
   $ hg serve -R ../src -d -p $HGPORT --pid-file hg.pid \
   >          --config "web.allow_push=*" --config web.push_ssl=no
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ echo change >> large
   $ hg commit -m change
 
   $ rm -r "$USERCACHE"
 
   $ hg push -q http://localhost:$HGPORT/
 
   $ ../ls-l.py ../src/.hg/largefiles/b734e14a0971e370408ab9bce8d56d8485e368a9
   640
 
   $ cd ..
 
 #endif