1 files changed, 280 insertions, 0 deletions
diff --git a/t/t5543-atomic-push.sh b/t/t5543-atomic-push.sh
new file mode 100755
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@@ -0,0 +1,280 @@
+#!/bin/sh
+
+test_description='pushing to a repository using the atomic push option'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+
+mk_repo_pair () {
+	rm -rf workbench upstream &&
+	test_create_repo upstream &&
+	test_create_repo workbench &&
+	(
+		cd upstream &&
+		git config receive.denyCurrentBranch warn
+	) &&
+	(
+		cd workbench &&
+		git remote add up ../upstream
+	)
+}
+
+# Compare the ref ($1) in upstream with a ref value from workbench ($2)
+# i.e. test_refs second HEAD@{2}
+test_refs () {
+	test $# = 2 &&
+	git -C upstream rev-parse --verify "$1" >expect &&
+	git -C workbench rev-parse --verify "$2" >actual &&
+	test_cmp expect actual
+}
+
+fmt_status_report () {
+	sed -n \
+		-e "/^To / { s/   */ /g; p; }" \
+		-e "/^ ! / { s/   */ /g; p; }"
+}
+
+test_expect_success 'atomic push works for a single branch' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		git push --atomic up main
+	) &&
+	test_refs main main
+'
+
+test_expect_success 'atomic push works for two branches' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git branch second &&
+		git push --mirror up &&
+		test_commit two &&
+		git checkout second &&
+		test_commit three &&
+		git push --atomic up main second
+	) &&
+	test_refs main main &&
+	test_refs second second
+'
+
+test_expect_success 'atomic push works in combination with --mirror' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git checkout -b second &&
+		test_commit two &&
+		git push --atomic --mirror up
+	) &&
+	test_refs main main &&
+	test_refs second second
+'
+
+test_expect_success 'atomic push works in combination with --force' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git branch second main &&
+		test_commit two_a &&
+		git checkout second &&
+		test_commit two_b &&
+		test_commit three_b &&
+		test_commit four &&
+		git push --mirror up &&
+		# The actual test is below
+		git checkout main &&
+		test_commit three_a &&
+		git checkout second &&
+		git reset --hard HEAD^ &&
+		git push --force --atomic up main second
+	) &&
+	test_refs main main &&
+	test_refs second second
+'
+
+# set up two branches where main can be pushed but second can not
+# (non-fast-forward). Since second can not be pushed the whole operation
+# will fail and leave main untouched.
+test_expect_success 'atomic push fails if one branch fails' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git checkout -b second main &&
+		test_commit two &&
+		test_commit three &&
+		test_commit four &&
+		git push --mirror up &&
+		git reset --hard HEAD~2 &&
+		test_commit five &&
+		git checkout main &&
+		test_commit six &&
+		test_must_fail git push --atomic --all up
+	) &&
+	test_refs main HEAD@{7} &&
+	test_refs second HEAD@{4}
+'
+
+test_expect_success 'atomic push fails if one tag fails remotely' '
+	# prepare the repo
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git checkout -b second main &&
+		test_commit two &&
+		git push --mirror up
+	) &&
+	# a third party modifies the server side:
+	(
+		cd upstream &&
+		git checkout second &&
+		git tag test_tag second
+	) &&
+	# see if we can now push both branches.
+	(
+		cd workbench &&
+		git checkout main &&
+		test_commit three &&
+		git checkout second &&
+		test_commit four &&
+		git tag test_tag &&
+		test_must_fail git push --tags --atomic up main second
+	) &&
+	test_refs main HEAD@{3} &&
+	test_refs second HEAD@{1}
+'
+
+test_expect_success 'atomic push obeys update hook preventing a branch to be pushed' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git checkout -b second main &&
+		test_commit two &&
+		git push --mirror up
+	) &&
+	test_hook -C upstream update <<-\EOF &&
+	# only allow update to main from now on
+	test "$1" = "refs/heads/main"
+	EOF
+	(
+		cd workbench &&
+		git checkout main &&
+		test_commit three &&
+		git checkout second &&
+		test_commit four &&
+		test_must_fail git push --atomic up main second
+	) &&
+	test_refs main HEAD@{3} &&
+	test_refs second HEAD@{1}
+'
+
+test_expect_success 'atomic push is not advertised if configured' '
+	mk_repo_pair &&
+	(
+		cd upstream &&
+		git config receive.advertiseatomic 0
+	) &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		test_must_fail git push --atomic up main
+	) &&
+	test_refs main HEAD@{1}
+'
+
+# References in upstream : main(1) one(1) foo(1)
+# References in workbench: main(2)        foo(1) two(2) bar(2)
+# Atomic push            : main(2)               two(2) bar(2)
+test_expect_success 'atomic push reports (reject by update hook)' '
+	mk_repo_pair &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git branch foo &&
+		git push up main one foo &&
+		git tag -d one
+	) &&
+	(
+		mkdir -p upstream/.git/hooks &&
+		cat >upstream/.git/hooks/update <<-EOF &&
+		#!/bin/sh
+
+		if test "\$1" = "refs/heads/bar"
+		then
+			echo >&2 "Pusing to branch bar is prohibited"
+			exit 1
+		fi
+		EOF
+		chmod a+x upstream/.git/hooks/update
+	) &&
+	(
+		cd workbench &&
+		test_commit two &&
+		git branch bar
+	) &&
+	test_must_fail git -C workbench \
+		push --atomic up main two bar >out 2>&1 &&
+	fmt_status_report <out >actual &&
+	cat >expect <<-EOF &&
+	To ../upstream
+	 ! [remote rejected] main -> main (atomic push failure)
+	 ! [remote rejected] two -> two (atomic push failure)
+	 ! [remote rejected] bar -> bar (hook declined)
+	EOF
+	test_cmp expect actual
+'
+
+# References in upstream : main(1) one(1) foo(1)
+# References in workbench: main(2)        foo(1) two(2) bar(2)
+test_expect_success 'atomic push reports (mirror, but reject by update hook)' '
+	(
+		cd workbench &&
+		git remote remove up &&
+		git remote add up ../upstream
+	) &&
+	test_must_fail git -C workbench \
+		push --atomic --mirror up >out 2>&1 &&
+	fmt_status_report <out >actual &&
+	cat >expect <<-EOF &&
+	To ../upstream
+	 ! [remote rejected] main -> main (atomic push failure)
+	 ! [remote rejected] one (atomic push failure)
+	 ! [remote rejected] bar -> bar (hook declined)
+	 ! [remote rejected] two -> two (atomic push failure)
+	EOF
+	test_cmp expect actual
+'
+
+# References in upstream : main(2) one(1) foo(1)
+# References in workbench: main(1)        foo(1) two(2) bar(2)
+test_expect_success 'atomic push reports (reject by non-ff)' '
+	rm upstream/.git/hooks/update &&
+	(
+		cd workbench &&
+		git push up main &&
+		git reset --hard HEAD^
+	) &&
+	test_must_fail git -C workbench \
+		push --atomic up main foo bar >out 2>&1 &&
+	fmt_status_report <out >actual &&
+	cat >expect <<-EOF &&
+	To ../upstream
+	 ! [rejected] main -> main (non-fast-forward)
+	 ! [rejected] bar -> bar (atomic push failed)
+	EOF
+	test_cmp expect actual
+'
+
+test_done