[PATCH] Add test case for ls-files --with-head

[Carl Worth <cworth@cworth.org>]

This tests basic functionality and also exercises a bug noticed
by Keith Packard, (prune_cache followed by add_index_entry can
trigger an attempt to realloc a pointer into the middle of an
allocated buffer).

Signed-off-by: Carl Worth <cworth@cworth.org>
---
 t/t3060-ls-files-with-head.sh |   55 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 55 insertions(+), 0 deletions(-)
 create mode 100755 t/t3060-ls-files-with-head.sh

 On Wed, 03 Oct 2007 14:09:13 +0200, Johannes Sixt wrote:
 > seq is not universally available. Can we have that as

 Simple enough. I've included the amended patch, (and I even
 remembered to do the sign-off thing this time).

 Thanks,

 -Carl

diff --git a/t/t3060-ls-files-with-head.sh b/t/t3060-ls-files-with-head.sh
new file mode 100755
index 0000000..bc3ef58
--- /dev/null
+++ b/t/t3060-ls-files-with-head.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Carl D. Worth
+#
+
+test_description='gt ls-files test (--with-head).
+
+This test runs git ls-files --with-head and in particular in
+a scenario known to trigger a crash with some versions of git.
+'
+. ./test-lib.sh
+
+# The bug we're exercising requires a fair number of entries in a
+# sub-directory so that add_index_entry will trigger a realloc
+echo file > expected
+mkdir sub
+for i in 0 1 2 3 4; do
+	for j in 0 1 2 3 4 5 6 7 8 9; do
+		> sub/file-$i$j
+		echo file-$i$j >> expected
+	done
+done
+git add .
+git commit -m "add a bunch of files"
+
+# We remove them all so that we'll have something to add back with
+# --with-head and so that we'll definitely be under the realloc size
+# to trigger the bug.
+rm -r sub
+git commit -a -m "remove them all"
+
+# The bug also requires some entry before our directory so that
+# prune_path will modify the_index.cache
+mkdir a_directory_that_sorts_before_sub
+touch a_directory_that_sorts_before_sub/file
+mkdir sub
+touch sub/file
+git add .
+
+# We have to run from a sub-directory to trigger prune_path
+cd sub
+
+# Then we finally get to run our --with-tree test
+test_expect_success \
+    'git -ls-files --with-tree should succeed.' \
+    'git ls-files --with-tree=HEAD~1 >../output'
+
+cd ..
+test_expect_success \
+    'git -ls-files --with-tree should add entries from named tree.' \
+    'diff output expected'
+
+test_done
+
+
-- 
1.5.3.3.131.g34c6d