[PATCH v4 2/9] read-tree + fetch tests: test failing "--super-prefix" interaction

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From: Glen Choo <chooglen@xxxxxxxxxx>

Ever since "git fetch --refetch" was introduced in 0f5e8851737 (Merge
branch 'rc/fetch-refetch', 2022-04-04) the test being added here would
fail. This is because "restore" will "read-tree .. --reset <hash>",
which will in turn invoke "fetch". The "fetch" will then die with:

	fatal: fetch doesn't support --super-prefix

This edge case and other "--super-prefix" bugs will be fixed in
subsequent commits, but let's first add a "test_expect_failure" test
for it. It passes until the very last command in the test.

Signed-off-by: Glen Choo <chooglen@xxxxxxxxxx>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 t/t5616-partial-clone.sh | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh
index 037941b95d2..2846ec6629c 100755
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -644,6 +644,49 @@ test_expect_success 'repack does not loosen promisor objects' '
 	grep "loosen_unused_packed_objects/loosened:0" trace
 '
 
+test_expect_failure 'lazy-fetch in submodule succeeds' '
+	# setup
+	test_config_global protocol.file.allow always &&
+
+	test_when_finished "rm -rf src-sub" &&
+	git init src-sub &&
+	git -C src-sub config uploadpack.allowfilter 1 &&
+	git -C src-sub config uploadpack.allowanysha1inwant 1 &&
+
+	# This blob must be missing in the subsequent commit.
+	echo foo >src-sub/file &&
+	git -C src-sub add file &&
+	git -C src-sub commit -m "submodule one" &&
+	SUB_ONE=$(git -C src-sub rev-parse HEAD) &&
+
+	echo bar >src-sub/file &&
+	git -C src-sub add file &&
+	git -C src-sub commit -m "submodule two" &&
+	SUB_TWO=$(git -C src-sub rev-parse HEAD) &&
+
+	test_when_finished "rm -rf src-super" &&
+	git init src-super &&
+	git -C src-super config uploadpack.allowfilter 1 &&
+	git -C src-super config uploadpack.allowanysha1inwant 1 &&
+	git -C src-super submodule add ../src-sub src-sub &&
+
+	git -C src-super/src-sub checkout $SUB_ONE &&
+	git -C src-super add src-sub &&
+	git -C src-super commit -m "superproject one" &&
+
+	git -C src-super/src-sub checkout $SUB_TWO &&
+	git -C src-super add src-sub &&
+	git -C src-super commit -m "superproject two" &&
+
+	# the fetch
+	test_when_finished "rm -rf client" &&
+	git clone --filter=blob:none --also-filter-submodules \
+		--recurse-submodules "file://$(pwd)/src-super" client &&
+
+	# Trigger lazy-fetch from the superproject
+	git -C client restore --recurse-submodules --source=HEAD^ :/
+'
+
 . "$TEST_DIRECTORY"/lib-httpd.sh
 start_httpd
 
-- 
2.39.0.rc2.1048.g0e5493b8d5b




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