tests/test-backout

Prevent type exception on concatenation if diffstat returns None.

This will most often occur if diffstat is not installed in the
target platform, though may also happen in other cases where
diffstat fails to execute.

Signed-off-by: Sean Dague <[e-mail]>

#!/bin/sh

echo '# basic operation'
hg init basic
cd basic
echo a > a
hg commit -d '0 0' -A -m a
echo b >> a
hg commit -d '1 0' -m b

hg backout -d '2 0' tip
cat a

echo '# file that was removed is recreated'
cd ..
hg init remove
cd remove

echo content > a
hg commit -d '0 0' -A -m a

hg rm a
hg commit -d '1 0' -m b

hg backout -d '2 0' --merge tip
cat a

echo '# backout of backout is as if nothing happened'

hg backout -d '3 0' --merge tip
cat a 2>/dev/null || echo cat: a: No such file or directory

echo '# backout with merge'
cd ..
hg init merge
cd merge

echo line 1 > a
hg commit -d '0 0' -A -m a

echo line 2 >> a
hg commit -d '1 0' -m b

echo line 3 >> a
hg commit -d '2 0' -m c

hg backout --merge -d '3 0' 1
hg commit -d '4 0' -m d
cat a

echo '# backout should not back out subsequent changesets'
hg init onecs
cd onecs
echo 1 > a
hg commit -d '0 0' -A -m a
echo 2 >> a
hg commit -d '1 0' -m b
echo 1 > b
hg commit -d '2 0' -A -m c
hg backout -d '3 0' 1
hg locate b

cd ..
hg init m
cd m
echo a > a
hg commit -d '0 0' -A -m a
echo b > b
hg commit -d '1 0' -A -m b
echo c > c
hg commit -d '2 0' -A -m b
hg update 1
echo d > d
hg commit -d '3 0' -A -m c
hg merge 2
hg commit -d '4 0' -A -m d

echo '# backout of merge should fail'

hg backout 4

echo '# backout of merge with bad parent should fail'

hg backout --parent 0 4

echo '# backout of non-merge with parent should fail'

hg backout --parent 0 3

echo '# backout with valid parent should be ok'

hg backout -d '5 0' --parent 2 4

hg rollback
hg update -C

hg backout -d '6 0' --parent 3 4

exit 0