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from urllib2 import HTTPError
from webkitpy.common.net.network_transaction import NetworkTransaction, NetworkTimeout
from webkitpy.common.system.log_testing import LoggingTestCase


class NetworkTransactionTest(LoggingTestCase):
    exception = Exception('Test exception')

    def setUp(self):
        super(NetworkTransactionTest, self).setUp()
        self._run_count = 0

    def test_success(self):
        transaction = NetworkTransaction()
        self.assertEqual(transaction.run(lambda: 42), 42)

    def _raise_exception(self):
        raise self.exception

    def test_exception(self):
        transaction = NetworkTransaction()
        did_process_exception = False
        did_throw_exception = True
        try:
            transaction.run(self._raise_exception)
            did_throw_exception = False
        except Exception as error:  # pylint: disable=broad-except
            did_process_exception = True
            self.assertEqual(error, self.exception)
        self.assertTrue(did_throw_exception)
        self.assertTrue(did_process_exception)

    def _raise_500_error(self):
        self._run_count += 1
        if self._run_count < 3:
            raise HTTPError('http://example.com/', 500, 'internal server error', None, None)
        return 42

    def _raise_404_error(self):
        raise HTTPError('http://foo.com/', 404, 'not found', None, None)

    def test_retry(self):
        transaction = NetworkTransaction(initial_backoff_seconds=0)
        self.assertEqual(transaction.run(self._raise_500_error), 42)
        self.assertEqual(self._run_count, 3)
        self.assertLog(['WARNING: Received HTTP status 500 loading "http://example.com/".  '
                        'Retrying in 0 seconds...\n',
                        'WARNING: Received HTTP status 500 loading "http://example.com/".  '
                        'Retrying in 0.0 seconds...\n'])

    def test_convert_404_to_none(self):
        transaction = NetworkTransaction(return_none_on_404=True)
        self.assertIsNone(transaction.run(self._raise_404_error))

    def test_timeout(self):
        transaction = NetworkTransaction(initial_backoff_seconds=60 * 60, timeout_seconds=60)
        did_process_exception = False
        did_throw_exception = True
        try:
            transaction.run(self._raise_500_error)
            did_throw_exception = False
        except NetworkTimeout:
            did_process_exception = True
        self.assertTrue(did_throw_exception)
        self.assertTrue(did_process_exception)