tests: add test for bookmark push/pull

tests/test-bookmarks-pushpull.t

@@ -0,0 +1,65 b''
+  $ echo "[extensions]" >> $HGRCPATH
+  $ echo "bookmarks=" >> $HGRCPATH
+
+  $ echo "[bookmarks]" >> $HGRCPATH
+  $ echo "track.current = True" >> $HGRCPATH
+
+initialize
+
+  $ hg init a
+  $ cd a
+  $ echo 'test' > test
+  $ hg commit -Am'test'
+  adding test
+
+set bookmarks
+
+  $ hg bookmark X
+  $ hg bookmark Y
+  $ hg bookmark Z
+
+import bookmark by name
+
+  $ hg init ../b
+  $ cd ../b
+  $ hg pull ../a
+  pulling from ../a
+  requesting all changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  (run 'hg update' to get a working copy)
+  $ hg bookmarks
+  no bookmarks set
+  $ hg pull -B X ../a
+  pulling from ../a
+  searching for changes
+  no changes found
+  importing bookmark X
+  $ hg bookmark
+     X                         0:4e3505fd9583
+
+export bookmark by name
+
+  $ hg bookmark W
+  $ hg bookmark foo
+  $ hg bookmark foobar
+  $ hg push -B W ../a
+  pushing to ../a
+  searching for changes
+  no changes found
+  exporting bookmark W
+  $ hg -R ../a bookmarks
+     Y                         0:4e3505fd9583
+     X                         0:4e3505fd9583
+   * Z                         0:4e3505fd9583
+     W                         -1:000000000000
+
+push/pull name that doesn't exist
+
+  $ hg push -B badname ../a
+  bookmark badname does not exist on the local or remote repository!
+  $ hg pull -B anotherbadname ../a
+  abort: remote bookmark anotherbadname not found!
+  $ true