Use 'hg ci -d "1000000 0"' in tests to circumvent problem with leading zero. Some systems show "Thu Jan 01" instead of "Thu Jan 1", which breaks tests. Using "1000000" yields "Mon Jan 12 13:46:40 1970", which looks the same on all systems.

#!/bin/sh

hg init a
cd a
echo a > foo
hg add foo
hg commit -m 1 -d "1000000 0"
rm foo
hg remove foo
hg commit -m 2 -d "1000000 0"
hg export 0
hg export 1
hg log -p -r 0
hg log -p -r 1

cd ..
hg clone a b