RETIRED, further work has moved to Debian project infrastructure
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#!/usr/bin/env python
import os
import sys
import unittest
try:
from unittest.mock import patch
except ImportError:
from mock import patch
from xvfbwrapper import Xvfb
class TestXvfb(unittest.TestCase):
def reset_display(self):
os.environ['DISPLAY'] = ':0'
def setUp(self):
self.reset_display()
def test_xvfb_binary_not_exists(self):
with patch('xvfbwrapper.Xvfb.xvfb_exists') as xvfb_exists:
xvfb_exists.return_value = False
with self.assertRaises(EnvironmentError):
Xvfb()
def test_start(self):
xvfb = Xvfb()
self.addCleanup(xvfb.stop)
xvfb.start()
display_var = ':{}'.format(xvfb.new_display)
self.assertEqual(display_var, os.environ['DISPLAY'])
self.assertIsNotNone(xvfb.proc)
def test_stop(self):
orig_display = os.environ['DISPLAY']
xvfb = Xvfb()
xvfb.start()
self.assertNotEqual(orig_display, os.environ['DISPLAY'])
xvfb.stop()
self.assertEqual(orig_display, os.environ['DISPLAY'])
self.assertIsNone(xvfb.proc)
def test_start_without_existing_display(self):
del os.environ['DISPLAY']
xvfb = Xvfb()
self.addCleanup(xvfb.stop)
self.addCleanup(self.reset_display)
xvfb.start()
display_var = ':{}'.format(xvfb.new_display)
self.assertEqual(display_var, os.environ['DISPLAY'])
self.assertIsNotNone(xvfb.proc)
def test_as_context_manager(self):
orig_display = os.environ['DISPLAY']
with Xvfb() as xvfb:
display_var = ':{}'.format(xvfb.new_display)
self.assertEqual(display_var, os.environ['DISPLAY'])
self.assertIsNotNone(xvfb.proc)
self.assertEqual(orig_display, os.environ['DISPLAY'])
self.assertIsNone(xvfb.proc)
def test_start_with_kwargs(self):
w = 800
h = 600
depth = 16
xvfb = Xvfb(width=w, height=h, colordepth=depth)
self.addCleanup(xvfb.stop)
xvfb.start()
self.assertEqual(w, xvfb.width)
self.assertEqual(h, xvfb.height)
self.assertEqual(depth, xvfb.colordepth)
display_var = ':{}'.format(xvfb.new_display)
self.assertEqual(display_var, os.environ['DISPLAY'])
self.assertIsNotNone(xvfb.proc)
def test_start_with_arbitrary_kwargs(self):
xvfb = Xvfb(nolisten='tcp')
self.addCleanup(xvfb.stop)
xvfb.start()
display_var = ':{}'.format(xvfb.new_display)
self.assertEqual(display_var, os.environ['DISPLAY'])
self.assertIsNotNone(xvfb.proc)
def test_start_fails_with_unknown_kwargs(self):
xvfb = Xvfb(foo='bar')
with self.assertRaises(RuntimeError):
xvfb.start()
def test_get_next_unused_display_does_not_reuse_lock(self):
xvfb = Xvfb()
xvfb2 = Xvfb()
xvfb3 = Xvfb()
self.addCleanup(xvfb._cleanup_lock_file)
self.addCleanup(xvfb2._cleanup_lock_file)
self.addCleanup(xvfb3._cleanup_lock_file)
side_effect = [11, 11, 22, 11, 22, 11, 22, 22, 22, 33]
with patch('xvfbwrapper.randint',
side_effect=side_effect) as mockrandint:
self.assertEqual(xvfb._get_next_unused_display(), 11)
self.assertEqual(mockrandint.call_count, 1)
if sys.version_info >= (3, 2):
with self.assertWarns(ResourceWarning):
self.assertEqual(xvfb2._get_next_unused_display(), 22)
self.assertEqual(mockrandint.call_count, 3)
self.assertEqual(xvfb3._get_next_unused_display(), 33)
self.assertEqual(mockrandint.call_count, 10)
else:
self.assertEqual(xvfb2._get_next_unused_display(), 22)
self.assertEqual(mockrandint.call_count, 3)
self.assertEqual(xvfb3._get_next_unused_display(), 33)
self.assertEqual(mockrandint.call_count, 10)