git-apply: prepare for upcoming GNU diff -u format change.

The latest GNU diff from CVS emits an empty line to express
an empty context line, instead of more traditional "single
white space followed by a newline".  Do not get broken by it.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 55 insertions, 0 deletions

diff --git a/t/t4118-apply-empty-context.sh b/t/t4118-apply-empty-context.sh
new file mode 100755
index 000000000..7309422fe
--- /dev/null
+++ b/t/t4118-apply-empty-context.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Junio C Hamano
+#
+
+test_description='git-apply with new style GNU diff with empty context
+
+'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	{
+		echo; echo;
+		echo A; echo B; echo C;
+		echo;
+	} >file1 &&
+	cat file1 >file1.orig &&
+	{
+		cat file1 &&
+		echo Q | tr -d "\\012"
+	} >file2 &&
+	cat file2 >file2.orig
+	git add file1 file2 &&
+	sed -e "/^B/d" <file1.orig >file1 &&
+	sed -e "/^B/d" <file2.orig >file2 &&
+	cat file1 >file1.mods &&
+	cat file2 >file2.mods &&
+	git diff |
+	sed -e "s/^ \$//" >diff.output
+'
+
+test_expect_success 'apply --numstat' '
+
+	git apply --numstat diff.output >actual &&
+	{
+		echo "0	1	file1" &&
+		echo "0	1	file2"
+	} >expect &&
+	diff -u expect actual
+
+'
+
+test_expect_success 'apply --apply' '
+
+	cat file1.orig >file1 &&
+	cat file2.orig >file2 &&
+	git update-index file1 file2 &&
+	git apply --index diff.output &&
+	diff -u file1.mods file1 &&
+	diff -u file2.mods file2
+'
+
+test_done
+