cat-file: provide %(deltabase) batch format

diff --git a/t/t1006-cat-file.sh b/t/t1006-cat-file.sh
index a420742494024e127d4e4233153c7054e077e471..633dc825ec49eb98be10c8f75545a6978c290231 100755 (executable)
--- a/t/t1006-cat-file.sh
+++ b/t/t1006-cat-file.sh
@@ -194,6 +194,12 @@ test_expect_success "--batch-check for an emtpy line" '
     test " missing" = "$(echo | git cat-file --batch-check)"
 '
 
+test_expect_success 'empty --batch-check notices missing object' '
+       echo "$_z40 missing" >expect &&
+       echo "$_z40" | git cat-file --batch-check="" >actual &&
+       test_cmp expect actual
+'
+
 batch_input="$hello_sha1
 $commit_sha1
 $tag_sha1
@@ -234,4 +240,38 @@ test_expect_success "--batch-check with multiple sha1s gives correct format" '
     "$(echo_without_newline "$batch_check_input" | git cat-file --batch-check)"
 '
 
+test_expect_success 'setup blobs which are likely to delta' '
+       test-genrandom foo 10240 >foo &&
+       { cat foo; echo plus; } >foo-plus &&
+       git add foo foo-plus &&
+       git commit -m foo &&
+       cat >blobs <<-\EOF
+       HEAD:foo
+       HEAD:foo-plus
+       EOF
+'
+
+test_expect_success 'confirm that neither loose blob is a delta' '
+       cat >expect <<-EOF
+       $_z40
+       $_z40
+       EOF
+       git cat-file --batch-check="%(deltabase)" <blobs >actual &&
+       test_cmp expect actual
+'
+
+# To avoid relying too much on the current delta heuristics,
+# we will check only that one of the two objects is a delta
+# against the other, but not the order. We can do so by just
+# asking for the base of both, and checking whether either
+# sha1 appears in the output.
+test_expect_success '%(deltabase) reports packed delta bases' '
+       git repack -ad &&
+       git cat-file --batch-check="%(deltabase)" <blobs >actual &&
+       {
+               grep "$(git rev-parse HEAD:foo)" actual ||
+               grep "$(git rev-parse HEAD:foo-plus)" actual
+       }
+'
+
 test_done