--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-diff-hashes.t	Mon Aug 30 16:52:21 2010 +0200
@@ -0,0 +1,45 @@
+  $ hg init a
+  $ cd a
+
+  $ hg diff inexistent1 inexistent2
+  inexistent1: No such file or directory
+  inexistent2: No such file or directory
+
+  $ echo bar > foo
+  $ hg add foo
+  $ hg ci -m 'add foo' -d '1000000 0'
+
+  $ echo foobar > foo
+  $ hg ci -m 'change foo' -d '1000001 0'
+
+  $ hg --quiet diff -r 0 -r 1
+  --- a/foo	Mon Jan 12 13:46:40 1970 +0000
+  +++ b/foo	Mon Jan 12 13:46:41 1970 +0000
+  @@ -1,1 +1,1 @@
+  -bar
+  +foobar
+
+  $ hg diff -r 0 -r 1
+  diff -r 74de3f1392e2 -r b8b5f023a6ad foo
+  --- a/foo	Mon Jan 12 13:46:40 1970 +0000
+  +++ b/foo	Mon Jan 12 13:46:41 1970 +0000
+  @@ -1,1 +1,1 @@
+  -bar
+  +foobar
+
+  $ hg --verbose diff -r 0 -r 1
+  diff -r 74de3f1392e2 -r b8b5f023a6ad foo
+  --- a/foo	Mon Jan 12 13:46:40 1970 +0000
+  +++ b/foo	Mon Jan 12 13:46:41 1970 +0000
+  @@ -1,1 +1,1 @@
+  -bar
+  +foobar
+
+  $ hg --debug diff -r 0 -r 1
+  diff -r 74de3f1392e2d67856fb155963441f2610494e1a -r b8b5f023a6ad77fc378bd95cf3fa00cd1414d107 foo
+  --- a/foo	Mon Jan 12 13:46:40 1970 +0000
+  +++ b/foo	Mon Jan 12 13:46:41 1970 +0000
+  @@ -1,1 +1,1 @@
+  -bar
+  +foobar
+