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-rwxr-xr-xt/t5351-unpack-large-objects.sh103
1 files changed, 103 insertions, 0 deletions
diff --git a/t/t5351-unpack-large-objects.sh b/t/t5351-unpack-large-objects.sh
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+++ b/t/t5351-unpack-large-objects.sh
@@ -0,0 +1,103 @@
+#!/bin/sh
+#
+# Copyright (c) 2022 Han Xin
+#
+
+test_description='git unpack-objects with large objects'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+prepare_dest () {
+ test_when_finished "rm -rf dest.git" &&
+ git init --bare dest.git &&
+ git -C dest.git config core.bigFileThreshold "$1"
+}
+
+test_expect_success "create large objects (1.5 MB) and PACK" '
+ test-tool genrandom foo 1500000 >big-blob &&
+ test_commit --append foo big-blob &&
+ test-tool genrandom bar 1500000 >big-blob &&
+ test_commit --append bar big-blob &&
+ PACK=$(echo HEAD | git pack-objects --revs pack) &&
+ git verify-pack -v pack-$PACK.pack >out &&
+ sed -n -e "s/^\([0-9a-f][0-9a-f]*\).*\(commit\|tree\|blob\).*/\1/p" \
+ <out >obj-list
+'
+
+test_expect_success 'set memory limitation to 1MB' '
+ GIT_ALLOC_LIMIT=1m &&
+ export GIT_ALLOC_LIMIT
+'
+
+test_expect_success 'unpack-objects failed under memory limitation' '
+ prepare_dest 2m &&
+ test_must_fail git -C dest.git unpack-objects <pack-$PACK.pack 2>err &&
+ grep "fatal: attempting to allocate" err
+'
+
+test_expect_success 'unpack-objects works with memory limitation in dry-run mode' '
+ prepare_dest 2m &&
+ git -C dest.git unpack-objects -n <pack-$PACK.pack &&
+ test_stdout_line_count = 0 find dest.git/objects -type f &&
+ test_dir_is_empty dest.git/objects/pack
+'
+
+test_expect_success 'unpack big object in stream' '
+ prepare_dest 1m &&
+ git -C dest.git unpack-objects <pack-$PACK.pack &&
+ test_dir_is_empty dest.git/objects/pack
+'
+
+check_fsync_events () {
+ local trace="$1" &&
+ shift &&
+
+ cat >expect &&
+ sed -n \
+ -e '/^{"event":"counter",.*"category":"fsync",/ {
+ s/.*"category":"fsync",//;
+ s/}$//;
+ p;
+ }' \
+ <"$trace" >actual &&
+ test_cmp expect actual
+}
+
+BATCH_CONFIGURATION='-c core.fsync=loose-object -c core.fsyncmethod=batch'
+
+test_expect_success 'unpack big object in stream (core.fsyncmethod=batch)' '
+ prepare_dest 1m &&
+ GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
+ GIT_TEST_FSYNC=true \
+ git -C dest.git $BATCH_CONFIGURATION unpack-objects <pack-$PACK.pack &&
+ if grep "core.fsyncMethod = batch is unsupported" trace2.txt
+ then
+ flush_count=7
+ else
+ flush_count=1
+ fi &&
+ check_fsync_events trace2.txt <<-EOF &&
+ "name":"writeout-only","count":6
+ "name":"hardware-flush","count":$flush_count
+ EOF
+
+ test_dir_is_empty dest.git/objects/pack &&
+ git -C dest.git cat-file --batch-check="%(objectname)" <obj-list >current &&
+ cmp obj-list current
+'
+
+test_expect_success 'do not unpack existing large objects' '
+ prepare_dest 1m &&
+ git -C dest.git index-pack --stdin <pack-$PACK.pack &&
+ git -C dest.git unpack-objects <pack-$PACK.pack &&
+
+ # The destination came up with the exact same pack...
+ DEST_PACK=$(echo dest.git/objects/pack/pack-*.pack) &&
+ cmp pack-$PACK.pack $DEST_PACK &&
+
+ # ...and wrote no loose objects
+ test_stdout_line_count = 0 find dest.git/objects -type f ! -name "pack-*"
+'
+
+test_done