from io import StringIO

from django.core.management import call_command
from django.test import TestCase

from .. import test
from ...categories.models import Category
from ..management.commands import synchronizethreads


class SynchronizeThreadsTests(TestCase):
    def test_no_threads_sync(self):
        """command works when there are no threads"""
        command = synchronizethreads.Command()

        out = StringIO()
        call_command(command, stdout=out)
        command_output = out.getvalue().strip()

        self.assertEqual(command_output, "No threads were found")

    def test_threads_sync(self):
        """command synchronizes threads"""
        category = Category.objects.all_categories()[:1][0]

        threads = [test.post_thread(category) for _ in range(10)]
        for i, thread in enumerate(threads):
            [test.reply_thread(thread) for _ in range(i)]
            thread.replies = 0
            thread.save()

        command = synchronizethreads.Command()

        out = StringIO()
        call_command(command, stdout=out)

        for i, thread in enumerate(threads):
            db_thread = category.thread_set.get(id=thread.id)
            self.assertEqual(db_thread.replies, i)

        command_output = out.getvalue().splitlines()[-1].strip()
        self.assertEqual(command_output, "Synchronized 10 threads")