Run Android tests (returning with exit code 1 if they fail)

runTests.sh

# Use whatever your test app directory is for ExampleTest, and whatever the
# package you are testing for com.example.test

export PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$PATH"

pushd ExampleTest

# adb shell throws away the return value, so we have to hack do some magic
# see https://code.google.com/p/android/issues/detail?id=3254

adb logcat -c &&
python - <<END
import os
import re
import subprocess as sp
import sys
import threading
import time

done = False

def update():
  # prevent CI from killing the process for inactivity
  while not done:
    time.sleep(5)
    print "Running..."

t = threading.Thread(target=update)
t.dameon = True
t.start()

def run():
  os.system('adb wait-for-device')
  p = sp.Popen('adb shell am instrument -w com.example.test/android.test.InstrumentationTestRunner',
               shell=True, stdout=sp.PIPE, stderr=sp.PIPE, stdin=sp.PIPE)
  return p.communicate()

success = re.compile(r'OK \(\d+ tests\)')

stdout, stderr = run()
done = True
print stderr
print stdout

if success.search(stderr + stdout):
  sys.exit(0)
else:
  sys.exit(1) # make sure we fail if the tests fail
END
RETVAL=$?
adb logcat -d '*:E'

popd

exit $RETVAL