Add a test checking if send-pack updated local tracking branches correctly

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5404-tracking-branches.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+test_description='tracking branch update checks for git push'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	echo 1 >file &&
+	git add file &&
+	git commit -m 1 &&
+	git branch b1 &&
+	git branch b2 &&
+	git clone . aa &&
+	git checkout b1 &&
+	echo b1 >>file &&
+	git commit -a -m b1 &&
+	git checkout b2 &&
+	echo b2 >>file &&
+	git commit -a -m b2
+'
+
+test_expect_success 'check tracking branches updated correctly after push' '
+	cd aa &&
+	b1=$(git rev-parse origin/b1) &&
+	b2=$(git rev-parse origin/b2) &&
+	git checkout -b b1 origin/b1 &&
+	echo aa-b1 >>file &&
+	git commit -a -m aa-b1 &&
+	git checkout -b b2 origin/b2 &&
+	echo aa-b2 >>file &&
+	git commit -a -m aa-b2 &&
+	git checkout master &&
+	echo aa-master >>file &&
+	git commit -a -m aa-master &&
+	git push &&
+	test "$(git rev-parse origin/b1)" = "$b1" &&
+	test "$(git rev-parse origin/b2)" = "$b2"
+'
+
+test_done