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-rwxr-xr-xt/t7516-commit-races.sh30
1 files changed, 30 insertions, 0 deletions
diff --git a/t/t7516-commit-races.sh b/t/t7516-commit-races.sh
new file mode 100755
index 0000000000..f2ce14e907
--- /dev/null
+++ b/t/t7516-commit-races.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+test_description='git commit races'
+. ./test-lib.sh
+
+test_expect_success 'race to create orphan commit' '
+ write_script hare-editor <<-\EOF &&
+ git commit --allow-empty -m hare
+ EOF
+ test_must_fail env EDITOR=./hare-editor git commit --allow-empty -m tortoise -e &&
+ git show -s --pretty=format:%s >subject &&
+ grep hare subject &&
+ test -z "$(git show -s --pretty=format:%P)"
+'
+
+test_expect_success 'race to create non-orphan commit' '
+ write_script airplane-editor <<-\EOF &&
+ git commit --allow-empty -m airplane
+ EOF
+ git checkout --orphan branch &&
+ git commit --allow-empty -m base &&
+ git rev-parse HEAD >base &&
+ test_must_fail env EDITOR=./airplane-editor git commit --allow-empty -m ship -e &&
+ git show -s --pretty=format:%s >subject &&
+ grep airplane subject &&
+ git rev-parse HEAD^ >parent &&
+ test_cmp base parent
+'
+
+test_done