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-rwxr-xr-xt/t6010-merge-base.sh28
1 files changed, 28 insertions, 0 deletions
diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index f80bba871c..30a68335b3 100755
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -230,4 +230,32 @@ test_expect_success 'criss-cross merge-base for octopus-step' '
test_cmp expected.sorted actual.sorted
'
+test_expect_success 'using reflog to find the fork point' '
+ git reset --hard &&
+ git checkout -b base $E &&
+
+ (
+ for count in 1 2 3
+ do
+ git commit --allow-empty -m "Base commit #$count" &&
+ git rev-parse HEAD >expect$count &&
+ git checkout -B derived &&
+ git commit --allow-empty -m "Derived #$count" &&
+ git rev-parse HEAD >derived$count &&
+ git checkout -B base $E || exit 1
+ done
+
+ for count in 1 2 3
+ do
+ git merge-base --fork-point base $(cat derived$count) >actual &&
+ test_cmp expect$count actual || exit 1
+ done
+
+ ) &&
+ # check that we correctly default to HEAD
+ git checkout derived &&
+ git merge-base --fork-point base >actual &&
+ test_cmp expect3 actual
+'
+
test_done