import os
import sys
import unittest
from subprocess import Popen, PIPE


class CmdlineCrawlPipelineTest(unittest.TestCase):

    def _execute(self, spname):
        args = (sys.executable, '-m', 'scrapy.cmdline', 'crawl', spname)
        cwd = os.path.dirname(os.path.abspath(__file__))
        proc = Popen(args, stdout=PIPE, stderr=PIPE, cwd=cwd)
        proc.communicate()
        return proc.returncode

    def test_open_spider_normally_in_pipeline(self):
        self.assertEqual(self._execute('normal'), 0)

    def test_exception_at_open_spider_in_pipeline(self):
        self.assertEqual(self._execute('exception'), 1)