tests: add tests of debugmergestate with unresolved/resolved path conflicts

I'm about to change `hg debugmergestate` and it broke on these "pu"
and "pr" records on my first attempt (D8113), so let's add test
coverage.

Differential Revision: https://phab.mercurial-scm.org/D8119

tests/test-pathconflicts-merge.t

@@ -1,161 +1,177 b''
 Path conflict checking is currently disabled by default because of issue5716.
 Turn it on for this test.
 
   $ cat >> $HGRCPATH << EOF
   > [experimental]
   > merge.checkpathconflicts=True
   > EOF
 
   $ hg init repo
   $ cd repo
   $ echo base > base
   $ hg add base
   $ hg commit -m "base"
   $ hg bookmark -i base
   $ mkdir a
   $ echo 1 > a/b
   $ hg add a/b
   $ hg commit -m "file"
   $ hg bookmark -i file
   $ echo 2 > a/b
   $ hg commit -m "file2"
   $ hg bookmark -i file2
   $ hg up 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
 #if symlink
   $ mkdir a
   $ ln -s c a/b
   $ hg add a/b
   $ hg commit -m "link"
   created new head
 #else
   $ hg import -q --bypass - <<EOF
   > # HG changeset patch
   > link
   > 
   > diff --git a/a/b b/a/b
   > new file mode 120000
   > --- /dev/null
   > +++ b/a/b
   > @@ -0,0 +1,1 @@
   > +c
   > \ No newline at end of file
   > EOF
   $ hg up -q
 #endif
 
   $ hg bookmark -i link
   $ hg up 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkdir -p a/b/c
   $ echo 2 > a/b/c/d
   $ hg add a/b/c/d
   $ hg commit -m "dir"
   created new head
   $ hg bookmark -i dir
 
 Merge - local file conflicts with remote directory
 
   $ hg up file
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark file)
   $ hg bookmark -i
   $ hg merge --verbose dir
   resolving manifests
   a/b: path conflict - a file or link has the same name as a directory
   the local file has been renamed to a/b~0ed027b96f31
   resolve manually then use 'hg resolve --mark a/b'
   moving a/b to a/b~0ed027b96f31
   getting a/b/c/d
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg status
   M a/b/c/d
   A a/b~0ed027b96f31
   R a/b
+  $ hg debugmergestate
+  * version 2 records
+  local: 0ed027b96f31a2560c8abe689ba59876409a2b8e
+  other: 9049d9534d5c5d16264aab02b4b9e20d03faabef
+  labels:
+    local: working copy
+    other: merge rev
+  unrecognized entry: P	a/b	pu	a/b~0ed027b96f31	l
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg forget a/b~0ed027b96f31 && rm a/b~0ed027b96f31
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge file and dir (deleted file)"
 
 Merge - local symlink conflicts with remote directory
 
   $ hg up link
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark link)
   $ hg bookmark -i
   $ hg merge dir
   a/b: path conflict - a file or link has the same name as a directory
   the local file has been renamed to a/b~2ea68033e3be
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg status
   M a/b/c/d
   A a/b~2ea68033e3be
   R a/b
   $ hg resolve --list
   P a/b
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg mv a/b~2ea68033e3be a/b.old
   $ hg resolve --mark a/b
   (no more unresolved files)
+  $ hg debugmergestate
+  * version 2 records
+  local: 2ea68033e3be03a560471c1fc9e5704fbedb9b4b
+  other: 9049d9534d5c5d16264aab02b4b9e20d03faabef
+  labels:
+    local: working copy
+    other: merge rev
+  unrecognized entry: P	a/b	pr	a/b~2ea68033e3be	l
   $ hg resolve --list
   R a/b
   $ hg commit -m "merge link and dir (renamed link)"
 
 Merge - local directory conflicts with remote file or link
 
   $ hg up dir
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark dir)
   $ hg bookmark -i
   $ hg merge file
   a/b: path conflict - a file or link has the same name as a directory
   the remote file has been renamed to a/b~0ed027b96f31
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg status
   A a/b~0ed027b96f31
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg mv a/b~0ed027b96f31 a/b/old-b
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge dir and file (move file into dir)"
   created new head
   $ hg merge file2
   merging a/b/old-b and a/b to a/b/old-b
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat a/b/old-b
   2
   $ hg commit -m "merge file2 (copytrace tracked rename)"
   $ hg merge link
   a/b: path conflict - a file or link has the same name as a directory
   the remote file has been renamed to a/b~2ea68033e3be
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg mv a/b~2ea68033e3be a/b.old
 
 #if symlink
   $ readlink.py a/b.old
   a/b.old -> c
 #else
   $ cat a/b.old
   c (no-eol)
 #endif
 
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge link (rename link)"