[PATCH 2/2] gpt: add a test: printing a partition table must not modify it

[Jim Meyering]

* tests/t0200-gpt.sh: New file.
* tests/Makefile.am (TESTS): Add the new test.
---
 tests/Makefile.am  |    1 +
 tests/t0200-gpt.sh |   56 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+), 0 deletions(-)
 create mode 100755 tests/t0200-gpt.sh

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 1214f9c..14e4862 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,6 +1,7 @@
 TESTS = \
   t0000-basic.sh \
   t0100-print.sh \
+  t0200-gpt.sh \
   t1000-mkpartfs.sh \
   t1100-busy-label.sh \
   t1500-small-ext2.sh \
diff --git a/tests/t0200-gpt.sh b/tests/t0200-gpt.sh
new file mode 100755
index 0000000..633d580
--- /dev/null
+++ b/tests/t0200-gpt.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Copyright (C) 2009 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+test_description='printing a GPT partition table must not modify it'
+
+: ${srcdir=.}
+. $srcdir/test-lib.sh
+
+N=2M
+dev=loop-file
+test_expect_success \
+    'create a file large enough to hold a GPT partition table' \
+    'dd if=/dev/null of=$dev bs=1 seek=$N 2> /dev/null'
+
+test_expect_success \
+    'create a GPT partition table' \
+    'parted -s $dev mklabel gpt > out 2>&1'
+test_expect_success 'expect no output' 'compare out /dev/null'
+
+test_expect_success \
+    'save a copy of the original primary GPT table' \
+    'dd if=$dev of=before count=1 skip=1'
+
+test_expect_success \
+    'extend the backing file by 1 byte' \
+    'printf x >> $dev'
+
+test_expect_success \
+    'use parted simply to print the partition table' \
+    'parted -m -s $dev u s p > out 2> err'
+# don't bother comparing stdout
+test_expect_success 'expect no stderr' 'compare err /dev/null'
+
+test_expect_success \
+    'extract the primary GPT table again' \
+    'dd if=$dev of=after count=1 skip=1'
+
+test_expect_success \
+    'compare partition tables (they had better be identical)' \
+    'compare before after'
+
+test_done
--
1.6.2.rc1.175.g96b8a