diskimage-builder/tests/dib_functions_test.sh
Ian Wienand 53c57d75c7 Cleanup unmount_dir function
Cleanup this function to work with a symlinked directory.  Document
it's behaviour more exactly, and add a simple unit-test for it (not
run by default, due to doing things like mounting and unmounting
system dirs on a live system, which doesn't seem safe for CI.  But it
is useful for developers ensuring sanity).

Change-Id: I335316019ef948758392b03e91f9869102a472b9
2016-01-28 14:47:43 +11:00

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#!/bin/bash
# unit testing for some of the common-functions
#
# This is fairly invasive and *may* leave behind mounts, etc, that
# need a human in the loop. Thus it's mostly useful for developers
# during testing, but not so great for CI
source ../lib/common-functions
#
# Directory mounting and unmounting
#
# make mount points
TMP_DIR=$(mktemp -d)
cd $TMP_DIR
mkdir mnt
mkdir mnt/proc mnt/dev mnt/dev/pts mnt/sysfs mnt/sys
# for extra complexity, simulate the path being behind a symlink
ln -s mnt mnt-symlink
TMP_MOUNT_PATH=$TMP_DIR/mnt-symlink
# mount devices
mount_proc_dev_sys
if [ $(grep "$TMP_DIR" /proc/mounts | wc -l) -ne 4 ]; then
echo "*** FAILED to mount all directories"
# we might be in an unclean state here, but something is broken...
# we don't want to delete mounted system directories
return 1
else
echo "*** PASS : mounted all directories"
fi
# umount devices
unmount_dir $TMP_MOUNT_PATH
if [ $(grep "$TMP_DIR" /proc/mounts | wc -l) -ne 0 ]; then
echo "*** FAILED due to mounts being left behind"
return 1
else
echo "*** PASS all directories unmounted"
fi
# cleanup
rm -rf $TMP_DIR
### TODO more tests here