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#!/usr/bin/env python

# Copyright (c) 2013 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

# DESCRIPTION
# This script runs tests defined in meta/lib/selftest/
# It's purpose is to automate the testing of different bitbake tools.
# To use it you just need to source your build environment setup script and
# add the meta-selftest layer to your BBLAYERS.
# Call the script as: "oe-selftest" to run all the tests in in meta/lib/selftest/
# Call the script as: "oe-selftest <module>.<Class>.<method>" to run just a single test
# E.g: "oe-selftest bboutput.BitbakeLayers" will run just the BitbakeLayers class from meta/lib/selftest/bboutput.py


import os
import sys
import unittest
import logging

sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'meta/lib')))

import oeqa.selftest
import oeqa.utils.ftools as ftools
from oeqa.utils.commands import runCmd, get_bb_var, get_test_layer
from oeqa.selftest.base import oeSelfTest

def logger_create():
    log = logging.getLogger("selftest")
    log.setLevel(logging.DEBUG)

    fh = logging.FileHandler(filename='oe-selftest.log', mode='w')
    fh.setLevel(logging.DEBUG)

    ch = logging.StreamHandler(sys.stdout)
    ch.setLevel(logging.INFO)

    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    fh.setFormatter(formatter)
    ch.setFormatter(formatter)

    log.addHandler(fh)
    log.addHandler(ch)

    return log

log = logger_create()

def preflight_check():

    log.info("Checking that everything is in order before running the tests")

    if not os.environ.get("BUILDDIR"):
        log.error("BUILDDIR isn't set. Did you forget to source your build environment setup script?")
        return False

    builddir = os.environ.get("BUILDDIR")
    if os.getcwd() != builddir:
        log.info("Changing cwd to %s" % builddir)
        os.chdir(builddir)

    if not "meta-selftest" in get_bb_var("BBLAYERS"):
        log.error("You don't seem to have the meta-selftest layer in BBLAYERS")
        return False

    log.info("Running bitbake -p")
    runCmd("bitbake -p")

    return True

def add_include():
    builddir = os.environ.get("BUILDDIR")
    if "#include added by oe-selftest.py" \
        not in ftools.read_file(os.path.join(builddir, "conf/local.conf")):
            log.info("Adding: \"include selftest.inc\" in local.conf")
            ftools.append_file(os.path.join(builddir, "conf/local.conf"), \
                    "\n#include added by oe-selftest.py\ninclude selftest.inc")


def remove_include():
    builddir = os.environ.get("BUILDDIR")
    if "#include added by oe-selftest.py" \
        in ftools.read_file(os.path.join(builddir, "conf/local.conf")):
            log.info("Removing the include from local.conf")
            ftools.remove_from_file(os.path.join(builddir, "conf/local.conf"), \
                    "#include added by oe-selftest.py\ninclude selftest.inc")


def remove_inc_files():
    try:
        os.remove(os.path.join(os.environ.get("BUILDDIR"), "conf/selftest.inc"))
        for root, _, files in os.walk(get_test_layer()):
            for f in files:
                if f == 'test_recipe.inc':
                    os.remove(os.path.join(root, f))
    except OSError as e:
        pass

def get_tests():
    testslist = []
    for x in sys.argv[1:]:
        testslist.append('oeqa.selftest.' + x)
    if not testslist:
        testpath = os.path.abspath(os.path.dirname(oeqa.selftest.__file__))
        files = sorted([f for f in os.listdir(testpath) if f.endswith('.py') and not f.startswith('_') and f != 'base.py'])
        for f in files:
            module = 'oeqa.selftest.' + f[:-3]
            testslist.append(module)

    return testslist

def main():
    if not preflight_check():
        return 1

    testslist = get_tests()
    suite = unittest.TestSuite()
    loader = unittest.TestLoader()
    loader.sortTestMethodsUsing = None
    runner = unittest.TextTestRunner(verbosity=2)
    # we need to do this here, otherwise just loading the tests
    # will take 2 minutes (bitbake -e calls)
    oeSelfTest.testlayer_path = get_test_layer()
    for test in testslist:
        log.info("Loading tests from: %s" % test)
        try:
            suite.addTests(loader.loadTestsFromName(test))
        except AttributeError as e:
            log.error("Failed to import %s" % test)
            log.error(e)
            return 1
    add_include()
    result = runner.run(suite)
    log.info("Finished")
    if result.wasSuccessful():
        return 0
    else:
        return 1

if __name__ == "__main__":
    try:
        ret = main()
    except Exception:
        ret = 1
        import traceback
        traceback.print_exc(5)
    finally:
        remove_include()
        remove_inc_files()
    sys.exit(ret)
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