Script I've used for running mochitests on the emulator

run-mochitest.sh

#!/bin/bash

# Get full path from where the script was executed, full path is needed to run emulator succesfully
B2G_HOME=$(cd $(dirname $BASH_SOURCE); pwd)

. $B2G_HOME/load-config.sh

export DISPLAY=:0

# Other steps to do:
#
#   make -C ${GECKO_OBJDIR} package-tests
#
# You may also need to update the marionette client. See:
# https://developer.mozilla.org/en-US/docs/Mozilla/Firefox_OS/Platform/Testing/Setting_up_Marionette

make -C ${GECKO_OBJDIR} package-tests
cd ${GECKO_OBJDIR}/dist/test-package-stage/mochitest

#MANIFEST=tests/toolkit/mozapps/update/test/unit/xpcshell.ini
#TESTING_MODULES_DIR=${GECKO_OBJDIR}/dist/test-package-stage/modules
#BUSYBOX=${B2G_HOME}/busybox-armv6l

#--emulator arm
#--logcat-dir ${B2G_HOME} \
#    --test-path ${B2G_HOME}/gecko/dom/devicestorage/test/ \

# NOTES:
#   The mochitest test-container has the following manifest:
#   https://github.com/mozilla-b2g/gaia/blob/master/test_apps/test-container/manifest.webapp
#   and currently only getDeviceStorage('pictures') has readwrite access in that manifest.
#
#   Also, the devicestorage tests listed in
#   http://mxr.mozilla.org/mozilla-central/source/testing/mochitest/b2g.json
#   aren't run due to failures of some kind.

set -x
pwd
python runtestsb2g.py --b2gpath ${B2G_HOME} \
    --xre-path /home/work/B2G-desktop/moz-central-build/dist/bin \
    --console INFO \
    --emulator arm \
    --test-path=dom/devicestorage/test/ \
    --logcat-dir ${B2G_HOME} \
    | tee ${B2G_HOME}/run-mochitest.log

# Make a noise
echo -ne \\a