test_writing_process.py
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	import unittest
	from os import sep, path
	from os.path import isdir, dirname
	import lxml.etree as ET
	import sys
	import sys

	sys.path.append('svgscripts')
	dir_changed = False
	if not isdir('datatypes'):
	sys.path.append(dirname(sys.path[0]))
	dir_changed = True

	from datatypes.writing_process import WritingProcess

	class TestWritingProcess(unittest.TestCase):
	def setUp(self):
	DATADIR = dirname(__file__) + sep + 'test_data'
	if not isdir(DATADIR):
	DATADIR = dirname(dirname(__file__)) + sep + 'test_data'
	self.test_target_file = DATADIR + sep + 'test.xml'

	def test_init(self):
	wp = WritingProcess()
	self.assertEqual(wp.version, 0)
	self.assertEqual(wp.description, WritingProcess.VERSION_DESCRIPTION[0])

	def test_attachable(self):
	empty_tree = ET.ElementTree(ET.Element('page'))
	wp = WritingProcess()
	wp.attach_object_to_tree(empty_tree)
	wp_node = empty_tree.xpath('//' + WritingProcess.XML_TAG)
	self.assertEqual(len(wp_node), 1)
	self.assertEqual(wp_node[0].get('version'), str(wp.version))

	def test_create_writing_process_from_xml(self):
	empty_tree = ET.ElementTree(ET.Element('page'))
	wp = WritingProcess()
	wp.attach_object_to_tree(empty_tree)
	wp_node = empty_tree.xpath('//' + WritingProcess.XML_TAG)
	wp2 = WritingProcess.create_writing_process_from_xml(wp_node[0])
	self.assertEqual(wp2.version, wp.version)

	if __name__ == "__main__":
	unittest.main()