Sandbox::https://github.com/bpython/bpython/blob/main/bpython/test/test

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import os

import unittest

try:

import watchdog

from bpython.curtsiesfrontend.filewatch import ModuleChangedEventHandler

has_watchdog = True

except ImportError:

has_watchdog = False

from unittest import mock

@unittest.skipUnless(has_watchdog, "watchdog required")

class TestModuleChangeEventHandler(unittest.TestCase):

def setUp(self):

self.module = ModuleChangedEventHandler([], 1)

self.module.observer = mock.Mock()

def test_create_module_handler(self):

self.assertIsInstance(self.module, ModuleChangedEventHandler)

def test_add_module(self):

self.module._add_module("something/test.py")

self.assertIn(

os.path.abspath("something/test"),

self.module.dirs[os.path.abspath("something")],

)

def test_activate_throws_error_when_already_activated(self):

self.module.activated = True

with self.assertRaises(ValueError):

self.module.activate()