test_cmp expected observed
'
+test_expect_success 'get an error for missing tree object' '
+ git init r5 &&
+ echo foo >r5/foo &&
+ git -C r5 add foo &&
+ git -C r5 commit -m "foo" &&
+ del=$(git -C r5 rev-parse HEAD^{tree} | sed "s|..|&/|") &&
+ rm r5/.git/objects/$del &&
+ test_must_fail git -C r5 pack-objects --rev --stdout 2>bad_tree <<-EOF &&
+ HEAD
+ EOF
+ grep "bad tree object" bad_tree
+'
+
+test_expect_success 'setup for tests of tree:0' '
+ mkdir r1/subtree &&
+ echo "This is a file in a subtree" >r1/subtree/file &&
+ git -C r1 add subtree/file &&
+ git -C r1 commit -m subtree
+'
+
+test_expect_success 'verify tree:0 packfile has no blobs or trees' '
+ git -C r1 pack-objects --rev --stdout --filter=tree:0 >commitsonly.pack <<-EOF &&
+ HEAD
+ EOF
+ git -C r1 index-pack ../commitsonly.pack &&
+ git -C r1 verify-pack -v ../commitsonly.pack >objs &&
+ ! grep -E "tree|blob" objs
+'
+
+test_expect_success 'grab tree directly when using tree:0' '
+ # We should get the tree specified directly but not its blobs or subtrees.
+ git -C r1 pack-objects --rev --stdout --filter=tree:0 >commitsonly.pack <<-EOF &&
+ HEAD:
+ EOF
+ git -C r1 index-pack ../commitsonly.pack &&
+ git -C r1 verify-pack -v ../commitsonly.pack >objs &&
+ awk "/tree|blob/{print \$1}" objs >trees_and_blobs &&
+ git -C r1 rev-parse HEAD: >expected &&
+ test_cmp expected trees_and_blobs
+'
+
# Test blob:limit=<n>[kmg] filter.
# We boundary test around the size parameter. The filter is strictly less than
# the value, so size 500 and 1000 should have the same results, but 1001 should