def test_writeDockerConfig(mockOutput, mockOS, mock_open):
"""
Test that the writeDockerConfig function does it's job.
"""
fd = MagicMock()
mock_open.return_value = fd
#Test we get a warning and nothing else if path doesn't exist
mockOS.path.exists.return_value = False
dockerapi.writeDockerConfig()
assert not mock_open.called
assert len(mockOS.method_calls) == 1
#Test that it writes if we find path
mockOS.path.exists.side_effect = [True, False, True]
mockOS.listdir.return_value = ['/root', '/var']
dockerapi.writeDockerConfig()
assert mock_open.call_count == 1
file_handle = mock_open.return_value.__enter__.return_value
file_handle.write.assert_called_once_with(DOCKER_CONF)
#Test that we handle an excpetion when opening
mockOS.path.exists.side_effect = None
mockOS.path.exists.return_value = True
mockOS.listdir.return_value = ['/root']
mock_open.side_effect = Exception('Blammo!')
dockerapi.writeDockerConfig()
assert mock_open.call_count == 2
def initializeSystem():
"""
Perform some initialization steps such as writing important configuration.
"""
dockerapi.writeDockerConfig()