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