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[Libguestfs] [PATCH 4/4] Add test for virt-resize.

Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
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>From 7d14ce68915df10c4581b7adfcf49f1bcff33bf5 Mon Sep 17 00:00:00 2001
From: Richard W.M. Jones <rjones redhat com>
Date: Mon, 27 Sep 2010 17:06:14 +0100
Subject: [PATCH 4/4] Add test for virt-resize.

This tests a number of things which have caused problems for us:

 - resizing PVs and LV content
 - handling GPT format disks
 - using qcow2 as a target disk format
 - shrinking disk images

Note that the disk content is empty (not a real VM), but this is
adequate since all we want to test are the operations and calculations
done by virt-resize.  We are not interested here in whether e2fsprogs
and LVM actually works.
 tools/Makefile.am         |    1 +
 tools/test-virt-resize.sh |   31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 0 deletions(-)
 create mode 100755 tools/test-virt-resize.sh

diff --git a/tools/Makefile.am b/tools/Makefile.am
index ab14fe0..b92243c 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -86,6 +86,7 @@ TESTS = test-virt-cat.sh \
 	test-virt-list-filesystems.sh \
 	test-virt-ls.sh \
 	test-virt-make-fs.sh \
+	test-virt-resize.sh \
diff --git a/tools/test-virt-resize.sh b/tools/test-virt-resize.sh
new file mode 100755
index 0000000..75d5147
--- /dev/null
+++ b/tools/test-virt-resize.sh
@@ -0,0 +1,31 @@
+#!/bin/bash -
+export LANG=C
+set -e
+# Test expanding.
+# This exercises a number of interesting codepaths including resizing
+# LV content, handling GPT, and using qcow2 as a target.
+../fish/guestfish -N bootrootlv:/dev/VG/LV:ext2:ext4:400M:32M:gpt </dev/null
+qemu-img create -f qcow2 test2.img 500M
+./virt-resize -d --expand /dev/sda2 --lv-expand /dev/VG/LV test1.img test2.img
+# Test shrinking in a semi-realistic scenario.  Although the disk
+# image created above contains no data, we will nevertheless use
+# similar operations to ones that might be used by a real admin.
+../fish/guestfish -a test1.img <<EOF
+resize2fs-size /dev/VG/LV 190M
+lvresize /dev/VG/LV 190
+pvresize-size /dev/sda2 200M
+fsck ext4 /dev/VG/LV
+rm -f test2.img; truncate -s 300M test2.img
+./virt-resize -d --shrink /dev/sda2 test1.img test2.img
+rm -f test1.img test2.img

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