# Copyright (C) 2012 Google, Inc.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1.  Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
# 2.  Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import logging
import sys
import unittest

from webkitpy.common.unicode_compatibility import StringIO
from webkitpy.common.system.filesystem import FileSystem
from webkitpy.common.system.executive import Executive
from webkitpy.common.system.outputcapture import OutputCapture
from webkitpy.test.main import Tester, _Loader


STUBS_CLASS = __name__ + ".TestStubs"


class TestStubs(unittest.TestCase):
    def test_empty(self):
        pass

    def integration_test_empty(self):
        pass

    def serial_test_empty(self):
        pass

    def serial_integration_test_empty(self):
        pass


class TesterTest(unittest.TestCase):

    def test_no_tests_found(self):
        tester = Tester()
        errors = StringIO()

        # Here we need to remove any existing log handlers so that they
        # don't log the messages webkitpy.test while we're testing it.
        root_logger = logging.getLogger()
        root_handlers = root_logger.handlers
        root_logger.handlers = []

        tester.printer.stream = errors
        tester.finder.find_names = lambda args, run_all: []
        oc = OutputCapture()
        try:
            oc.capture_output()
            self.assertFalse(tester.run())
        finally:
            _, _, logs = oc.restore_output()
            root_logger.handlers = root_handlers

        self.assertIn('No tests to run', errors.getvalue())
        self.assertIn('No tests to run', logs)

    def _find_test_names(self, args):
        tester = Tester()
        tester._options, args = tester._parse_args(args)
        return tester._test_names(_Loader(), args)

    def test_individual_names_are_not_run_twice(self):
        args = [STUBS_CLASS + '.test_empty']
        parallel_tests, serial_tests = self._find_test_names(args)
        self.assertEqual(parallel_tests, args)
        self.assertEqual(serial_tests, [])

    def test_integration_tests_are_not_found_by_default(self):
        parallel_tests, serial_tests = self._find_test_names([STUBS_CLASS])
        self.assertEqual(parallel_tests, [
            STUBS_CLASS + '.test_empty',
            ])
        self.assertEqual(serial_tests, [
            STUBS_CLASS + '.serial_test_empty',
            ])

    def test_integration_tests_are_found(self):
        parallel_tests, serial_tests = self._find_test_names(['--integration-tests', STUBS_CLASS])
        self.assertEqual(parallel_tests, [
            STUBS_CLASS + '.integration_test_empty',
            STUBS_CLASS + '.test_empty',
            ])
        self.assertEqual(sorted(serial_tests), [
            STUBS_CLASS + '.serial_integration_test_empty',
            STUBS_CLASS + '.serial_test_empty',
            ])

    def integration_test_coverage_works(self):
        filesystem = FileSystem()
        executive = Executive()
        module_path = filesystem.path_to_module(self.__module__)
        script_dir = module_path[0:module_path.find('webkitpy') - 1]
        proc = executive.popen([sys.executable, filesystem.join(script_dir, 'test-webkitpy'), '-c', STUBS_CLASS + '.test_empty'],
                               stdout=executive.PIPE, stderr=executive.PIPE)
        out, _ = proc.communicate()
        retcode = proc.returncode
        self.assertEqual(retcode, 0)
        self.assertIn('Cover', out)