format-patch: inform user that patch-id generation is unstable

diff --git a/t/t3903-stash.sh b/t/t3903-stash.sh
index 97cc71fbaf6561995b75431c9e7b6173ba66902f..ea30d5f6a0f228971d29e257a89fca6ea594cecb 100755 (executable)
--- a/t/t3903-stash.sh
+++ b/t/t3903-stash.sh
@@ -612,6 +612,24 @@ test_expect_success 'stash show -p - no stashes on stack, stash-like argument' '
        test_cmp expected actual
 '
 
+test_expect_success 'stash show --patience shows diff' '
+       git reset --hard &&
+       echo foo >>file &&
+       STASH_ID=$(git stash create) &&
+       git reset --hard &&
+       cat >expected <<-EOF &&
+       diff --git a/file b/file
+       index 7601807..71b52c4 100644
+       --- a/file
+       +++ b/file
+       @@ -1 +1,2 @@
+        baz
+       +foo
+       EOF
+       git stash show --patience ${STASH_ID} >actual &&
+       test_cmp expected actual
+'
+
 test_expect_success 'drop: fail early if specified stash is not a stash ref' '
        git stash clear &&
        test_when_finished "git reset --hard HEAD && git stash clear" &&