Re: [PATCH 9/9] rerere forget path: forget recorded resolution

[Johannes Sixt <j6t@kdbg.org>]

Your implementation forgets to re-insert the forgotten resolutions into
MERGE_RR, therefore, the next 'git rerere' does not record the new
resolution.

In my implementation of 'rerere forget', I had the following tests.
The latter two of the three new tests fail with your implementation.

-- Hannes

diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index a6bc028..a3f0c18 100755
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -75,8 +75,9 @@ test_expect_success 'no postimage or thisimage yet' \
 test_expect_success 'preimage has right number of lines' '
 
 	cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
-	test $cnt = 13
-
+	test $cnt = 13 &&
+	cnt=$(grep "To die! T" $rr/preimage | wc -l) &&
+	test $cnt = 1
 '
 
 git show first:a1 > a1
@@ -142,7 +143,23 @@ test_expect_success 'rerere kicked in' "! grep ^=======$ a1"
 
 test_expect_success 'rerere prefers first change' 'test_cmp a1 expect'
 
-rm $rr/postimage
+test_expect_success 'rerere forget drops postimage' '
+	git rerere forget a1 &&
+	! test -f $rr/postimage
+'
+
+test_expect_success 'conflict hash is the same as before' '
+	test $sha1 = "$(perl -pe "s/	.*//" .git/MERGE_RR)"
+'
+
+test_expect_success 'preimage was updated' '
+	cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
+	test $cnt = 13 &&
+	cnt=$(grep "To die! T" $rr/preimage | wc -l) &&
+	test $cnt = 2
+'
+
+rm -f $rr/postimage
 echo "$sha1	a1" | perl -pe 'y/\012/\000/' > .git/MERGE_RR
 
 test_expect_success 'rerere clear' 'git rerere clear'