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while it is holding a lock to a buffered I/O object, and the main thread tries to use the same I/O object (typically stdout or stderr). A fatal error is emitted instead.
110 lines
5 KiB
Python
Executable file
110 lines
5 KiB
Python
Executable file
"""Unittests for test.script_helper. Who tests the test helper?"""
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import subprocess
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import sys
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from test import script_helper
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import unittest
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from unittest import mock
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class TestScriptHelper(unittest.TestCase):
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def test_assert_python_ok(self):
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t = script_helper.assert_python_ok('-c', 'import sys; sys.exit(0)')
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self.assertEqual(0, t[0], 'return code was not 0')
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def test_assert_python_failure(self):
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# I didn't import the sys module so this child will fail.
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rc, out, err = script_helper.assert_python_failure('-c', 'sys.exit(0)')
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self.assertNotEqual(0, rc, 'return code should not be 0')
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def test_assert_python_ok_raises(self):
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# I didn't import the sys module so this child will fail.
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with self.assertRaises(AssertionError) as error_context:
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script_helper.assert_python_ok('-c', 'sys.exit(0)')
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error_msg = str(error_context.exception)
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self.assertIn('command line was:', error_msg)
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self.assertIn('sys.exit(0)', error_msg, msg='unexpected command line')
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def test_assert_python_failure_raises(self):
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with self.assertRaises(AssertionError) as error_context:
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script_helper.assert_python_failure('-c', 'import sys; sys.exit(0)')
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error_msg = str(error_context.exception)
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self.assertIn('Process return code is 0,', error_msg)
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self.assertIn('import sys; sys.exit(0)', error_msg,
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msg='unexpected command line.')
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@mock.patch('subprocess.Popen')
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def test_assert_python_isolated_when_env_not_required(self, mock_popen):
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with mock.patch.object(script_helper,
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'_interpreter_requires_environment',
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return_value=False) as mock_ire_func:
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mock_popen.side_effect = RuntimeError('bail out of unittest')
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try:
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script_helper._assert_python(True, '-c', 'None')
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except RuntimeError as err:
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self.assertEqual('bail out of unittest', err.args[0])
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self.assertEqual(1, mock_popen.call_count)
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self.assertEqual(1, mock_ire_func.call_count)
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popen_command = mock_popen.call_args[0][0]
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self.assertEqual(sys.executable, popen_command[0])
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self.assertIn('None', popen_command)
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self.assertIn('-I', popen_command)
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self.assertNotIn('-E', popen_command) # -I overrides this
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@mock.patch('subprocess.Popen')
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def test_assert_python_not_isolated_when_env_is_required(self, mock_popen):
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"""Ensure that -I is not passed when the environment is required."""
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with mock.patch.object(script_helper,
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'_interpreter_requires_environment',
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return_value=True) as mock_ire_func:
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mock_popen.side_effect = RuntimeError('bail out of unittest')
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try:
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script_helper._assert_python(True, '-c', 'None')
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except RuntimeError as err:
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self.assertEqual('bail out of unittest', err.args[0])
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popen_command = mock_popen.call_args[0][0]
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self.assertNotIn('-I', popen_command)
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self.assertNotIn('-E', popen_command)
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class TestScriptHelperEnvironment(unittest.TestCase):
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"""Code coverage for _interpreter_requires_environment()."""
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def setUp(self):
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self.assertTrue(
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hasattr(script_helper, '__cached_interp_requires_environment'))
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# Reset the private cached state.
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script_helper.__dict__['__cached_interp_requires_environment'] = None
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def tearDown(self):
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# Reset the private cached state.
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script_helper.__dict__['__cached_interp_requires_environment'] = None
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@mock.patch('subprocess.check_call')
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def test_interpreter_requires_environment_true(self, mock_check_call):
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mock_check_call.side_effect = subprocess.CalledProcessError('', '')
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self.assertTrue(script_helper._interpreter_requires_environment())
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self.assertTrue(script_helper._interpreter_requires_environment())
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self.assertEqual(1, mock_check_call.call_count)
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@mock.patch('subprocess.check_call')
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def test_interpreter_requires_environment_false(self, mock_check_call):
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# The mocked subprocess.check_call fakes a no-error process.
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script_helper._interpreter_requires_environment()
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self.assertFalse(script_helper._interpreter_requires_environment())
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self.assertEqual(1, mock_check_call.call_count)
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@mock.patch('subprocess.check_call')
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def test_interpreter_requires_environment_details(self, mock_check_call):
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script_helper._interpreter_requires_environment()
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self.assertFalse(script_helper._interpreter_requires_environment())
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self.assertFalse(script_helper._interpreter_requires_environment())
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self.assertEqual(1, mock_check_call.call_count)
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check_call_command = mock_check_call.call_args[0][0]
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self.assertEqual(sys.executable, check_call_command[0])
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self.assertIn('-E', check_call_command)
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if __name__ == '__main__':
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unittest.main()
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