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"""Unittests for test.script_helper. Who tests the test helper?"""
import subprocess
import sys
from test import script_helper
import unittest
from unittest import mock
class TestScriptHelper(unittest.TestCase):
def test_assert_python_expect_success(self):
t = script_helper._assert_python(True, '-c', 'import sys; sys.exit(0)')
self.assertEqual(0, t[0], 'return code was not 0')
def test_assert_python_expect_failure(self):
# I didn't import the sys module so this child will fail.
rc, out, err = script_helper._assert_python(False, '-c', 'sys.exit(0)')
self.assertNotEqual(0, rc, 'return code should not be 0')
def test_assert_python_raises_expect_success(self):
# I didn't import the sys module so this child will fail.
with self.assertRaises(AssertionError) as error_context:
script_helper._assert_python(True, '-c', 'sys.exit(0)')
error_msg = str(error_context.exception)
self.assertIn('command line was:', error_msg)
self.assertIn('sys.exit(0)', error_msg, msg='unexpected command line')
def test_assert_python_raises_expect_failure(self):
with self.assertRaises(AssertionError) as error_context:
script_helper._assert_python(False, '-c', 'import sys; sys.exit(0)')
error_msg = str(error_context.exception)
self.assertIn('Process return code is 0,', error_msg)
self.assertIn('import sys; sys.exit(0)', error_msg,
msg='unexpected command line.')
class TestScriptHelperEnvironment(unittest.TestCase):
"""Code coverage for _interpreter_requires_environment()."""
def setUp(self):
self.assertTrue(
hasattr(script_helper, '__cached_interp_requires_environment'))
# Reset the private cached state.
script_helper.__dict__['__cached_interp_requires_environment'] = None
def tearDown(self):
# Reset the private cached state.
script_helper.__dict__['__cached_interp_requires_environment'] = None
@mock.patch('subprocess.check_call')
def test_interpreter_requires_environment_true(self, mock_check_call):
mock_check_call.side_effect = subprocess.CalledProcessError('', '')
self.assertTrue(script_helper._interpreter_requires_environment())
self.assertTrue(script_helper._interpreter_requires_environment())
self.assertEqual(1, mock_check_call.call_count)
@mock.patch('subprocess.check_call')
def test_interpreter_requires_environment_false(self, mock_check_call):
# The mocked subprocess.check_call fakes a no-error process.
script_helper._interpreter_requires_environment()
self.assertFalse(script_helper._interpreter_requires_environment())
self.assertEqual(1, mock_check_call.call_count)
@mock.patch('subprocess.check_call')
def test_interpreter_requires_environment_details(self, mock_check_call):
script_helper._interpreter_requires_environment()
self.assertFalse(script_helper._interpreter_requires_environment())
self.assertFalse(script_helper._interpreter_requires_environment())
self.assertEqual(1, mock_check_call.call_count)
check_call_command = mock_check_call.call_args[0][0]
self.assertEqual(sys.executable, check_call_command[0])
self.assertIn('-E', check_call_command)
if __name__ == '__main__':
unittest.main()
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