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import unittest
from lxml import etree
from xmldiff import utils
class TraverseTests(unittest.TestCase):
def test_post_order(self):
xml = """<document>
<story firstPageTemplate='FirstPage'>
<section xml:id='oldfirst' ref='3' single-ref='3'>
<para>First paragraph</para>
</section>
<section xml:id='oldlast' ref='4' single-ref='4'>
<para>Last paragraph</para>
</section>
</story>
</document>
"""
root = etree.fromstring(xml)
tree = root.getroottree()
res = [tree.getpath(x) for x in utils.post_order_traverse(root)]
self.assertEqual(
res,
[
"/document/story/section[1]/para",
"/document/story/section[1]",
"/document/story/section[2]/para",
"/document/story/section[2]",
"/document/story",
"/document",
],
)
def test_reverse_post_order(self):
xml = """<document>
<story firstPageTemplate='FirstPage'>
<section xml:id='oldfirst' ref='3' single-ref='3'>
<para>First paragraph</para>
</section>
<section xml:id='oldlast' ref='4' single-ref='4'>
<para>Last paragraph</para>
</section>
</story>
</document>
"""
root = etree.fromstring(xml)
tree = root.getroottree()
res = [tree.getpath(x) for x in utils.reverse_post_order_traverse(root)]
self.assertEqual(
res,
[
"/document/story/section[2]/para",
"/document/story/section[2]",
"/document/story/section[1]/para",
"/document/story/section[1]",
"/document/story",
"/document",
],
)
def test_breadth_first(self):
xml = """<document>
<story>
<section>
<para>First <i>paragraph</i></para>
<para>Second paragraph</para>
</section>
<section>
<para>Third paragraph</para>
<para>Fourth <b>paragraph</b></para>
</section>
</story>
<story>
<section>
<para>Fifth paragraph</para>
</section>
</story>
</document>
"""
root = etree.fromstring(xml)
tree = root.getroottree()
res = [tree.getpath(x) for x in utils.breadth_first_traverse(root)]
self.assertEqual(
res,
[
"/document",
"/document/story[1]",
"/document/story[2]",
"/document/story[1]/section[1]",
"/document/story[1]/section[2]",
"/document/story[2]/section",
"/document/story[1]/section[1]/para[1]",
"/document/story[1]/section[1]/para[2]",
"/document/story[1]/section[2]/para[1]",
"/document/story[1]/section[2]/para[2]",
"/document/story[2]/section/para",
"/document/story[1]/section[1]/para[1]/i",
"/document/story[1]/section[2]/para[2]/b",
],
)
class LongestCommonSubsequenceTests(unittest.TestCase):
def _diff(self, left, right, result):
res = []
for x, y in utils.longest_common_subsequence(left, right):
self.assertEqual(left[x], right[y])
res.append(left[x])
self.assertEqual("".join(res), result)
def test_lcs(self):
self._diff("ABCDEF", "ABCDEF", "ABCDEF")
self._diff("ABCDEF", "GHIJKL", "")
self._diff("ABCDEF", "ACDQRB", "ACD")
self._diff("CXCDEFX", "CDEFX", "CDEFX")
self._diff("HUMAN", "CHIMPANZEE", "HMAN")
self._diff("ABCDEF", "A", "A")
self._diff("123AAAAAAAAA", "123BBBBBBBBB", "123")
self._diff("AAAAAAAAA123", "BBBBBBBBB123", "123")
self._diff("ABCDE1", "1FGHIJK", "1")
# There are several correct options here, make sure that doesn't
# confuse it, we want just one, and don't care which.
self._diff("HORSEBACK", "SNOWFLAKE", "SAK")
# Empty sequences:
self._diff("", "", "")
class MakeAsciiTreeTests(unittest.TestCase):
def test_make_ascii_tree(self):
xml = """<document xmlns:diff="http://namespaces.shoobx.com/diff">
<story firstPageTemplate='FirstPage'>
<section xml:id='oldfirst' ref='3' single-ref='3'>
<para diff:delete="">First paragraph</para>
</section>
<section xml:id='oldlast' ref='4' single-ref='4'>
<para><diff:insert>Last paragraph</diff:insert></para>
</section>
</story>
</document>
"""
root = etree.fromstring(xml)
tree = utils.make_ascii_tree(root)
self.assertEqual(
tree,
" document \n story \n section \n para (delete)\n"
" section \n para \n diff:insert ",
)
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