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test_xml_etree.py
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# IMPORTANT: the same tests are run from "test_xml_etree_c" in order
# to ensure consistency between the C implementation and the Python
# implementation.
#
# For this purpose, the module-level "ET" symbol is temporarily
# monkey-patched when running the "test_xml_etree_c" test suite.
import copy
import functools
import html
import io
import itertools
import operator
import os
import pickle
import sys
import textwrap
import types
import unittest
import warnings
import weakref
from functools import partial
from itertools import product, islice
from test import support
from test.support import os_helper
from test.support import warnings_helper
from test.support import findfile, gc_collect, swap_attr, swap_item
from test.support.import_helper import import_fresh_module
from test.support.os_helper import TESTFN
# pyET is the pure-Python implementation.
#
# ET is pyET in test_xml_etree and is the C accelerated version in
# test_xml_etree_c.
pyET = None
ET = None
SIMPLE_XMLFILE = findfile("simple.xml", subdir="xmltestdata")
try:
SIMPLE_XMLFILE.encode("utf-8")
except UnicodeEncodeError:
raise unittest.SkipTest("filename is not encodable to utf8")
SIMPLE_NS_XMLFILE = findfile("simple-ns.xml", subdir="xmltestdata")
UTF8_BUG_XMLFILE = findfile("expat224_utf8_bug.xml", subdir="xmltestdata")
SAMPLE_XML = """\
<body>
<tag class='a'>text</tag>
<tag class='b' />
<section>
<tag class='b' id='inner'>subtext</tag>
</section>
</body>
"""
SAMPLE_SECTION = """\
<section>
<tag class='b' id='inner'>subtext</tag>
<nexttag />
<nextsection>
<tag />
</nextsection>
</section>
"""
SAMPLE_XML_NS = """
<body xmlns="http://effbot.org/ns">
<tag>text</tag>
<tag />
<section>
<tag>subtext</tag>
</section>
</body>
"""
SAMPLE_XML_NS_ELEMS = """
<root>
<h:table xmlns:h="hello">
<h:tr>
<h:td>Apples</h:td>
<h:td>Bananas</h:td>
</h:tr>
</h:table>
<f:table xmlns:f="foo">
<f:name>African Coffee Table</f:name>
<f:width>80</f:width>
<f:length>120</f:length>
</f:table>
</root>
"""
ENTITY_XML = """\
<!DOCTYPE points [
<!ENTITY % user-entities SYSTEM 'user-entities.xml'>
%user-entities;
]>
<document>&entity;</document>
"""
EXTERNAL_ENTITY_XML = """\
<!DOCTYPE points [
<!ENTITY entity SYSTEM "file:///non-existing-file.xml">
]>
<document>&entity;</document>
"""
ATTLIST_XML = """\
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Foo [
<!ELEMENT foo (bar*)>
<!ELEMENT bar (#PCDATA)*>
<!ATTLIST bar xml:lang CDATA "eng">
<!ENTITY qux "quux">
]>
<foo>
<bar>&qux;</bar>
</foo>
"""
def checkwarnings(*filters, quiet=False):
def decorator(test):
def newtest(*args, **kwargs):
with warnings_helper.check_warnings(*filters, quiet=quiet):
test(*args, **kwargs)
functools.update_wrapper(newtest, test)
return newtest
return decorator
def convlinesep(data):
return data.replace(b'\n', os.linesep.encode())
class ModuleTest(unittest.TestCase):
def test_sanity(self):
# Import sanity.
from xml.etree import ElementTree
from xml.etree import ElementInclude
from xml.etree import ElementPath
def test_all(self):
names = ("xml.etree.ElementTree", "_elementtree")
support.check__all__(self, ET, names, not_exported=("HTML_EMPTY",))
def serialize(elem, to_string=True, encoding='unicode', **options):
if encoding != 'unicode':
file = io.BytesIO()
else:
file = io.StringIO()
tree = ET.ElementTree(elem)
tree.write(file, encoding=encoding, **options)
if to_string:
return file.getvalue()
else:
file.seek(0)
return file
def summarize_list(seq):
return [elem.tag for elem in seq]
class ElementTestCase:
@classmethod
def setUpClass(cls):
cls.modules = {pyET, ET}
def pickleRoundTrip(self, obj, name, dumper, loader, proto):
try:
with swap_item(sys.modules, name, dumper):
temp = pickle.dumps(obj, proto)
with swap_item(sys.modules, name, loader):
result = pickle.loads(temp)
except pickle.PicklingError as pe:
# pyET must be second, because pyET may be (equal to) ET.
human = dict([(ET, "cET"), (pyET, "pyET")])
raise support.TestFailed("Failed to round-trip %r from %r to %r"
% (obj,
human.get(dumper, dumper),
human.get(loader, loader))) from pe
return result
def assertEqualElements(self, alice, bob):
self.assertIsInstance(alice, (ET.Element, pyET.Element))
self.assertIsInstance(bob, (ET.Element, pyET.Element))
self.assertEqual(len(list(alice)), len(list(bob)))
for x, y in zip(alice, bob):
self.assertEqualElements(x, y)
properties = operator.attrgetter('tag', 'tail', 'text', 'attrib')
self.assertEqual(properties(alice), properties(bob))
# --------------------------------------------------------------------
# element tree tests
class ElementTreeTest(unittest.TestCase):
def serialize_check(self, elem, expected):
self.assertEqual(serialize(elem), expected)
def test_interface(self):
# Test element tree interface.
def check_element(element):
self.assertTrue(ET.iselement(element), msg="not an element")
direlem = dir(element)
for attr in 'tag', 'attrib', 'text', 'tail':
self.assertTrue(hasattr(element, attr),
msg='no %s member' % attr)
self.assertIn(attr, direlem,
msg='no %s visible by dir' % attr)
self.assertIsInstance(element.tag, str)
self.assertIsInstance(element.attrib, dict)
if element.text is not None:
self.assertIsInstance(element.text, str)
if element.tail is not None:
self.assertIsInstance(element.tail, str)
for elem in element:
check_element(elem)
element = ET.Element("tag")
check_element(element)
tree = ET.ElementTree(element)
check_element(tree.getroot())
element = ET.Element("t\xe4g", key="value")
tree = ET.ElementTree(element)
self.assertRegex(repr(element), r"^<Element 't\xe4g' at 0x.*>$")
element = ET.Element("tag", key="value")
# Make sure all standard element methods exist.
def check_method(method):
self.assertTrue(hasattr(method, '__call__'),
msg="%s not callable" % method)
check_method(element.append)
check_method(element.extend)
check_method(element.insert)
check_method(element.remove)
check_method(element.find)
check_method(element.iterfind)
check_method(element.findall)
check_method(element.findtext)
check_method(element.clear)
check_method(element.get)
check_method(element.set)
check_method(element.keys)
check_method(element.items)
check_method(element.iter)
check_method(element.itertext)
# These methods return an iterable. See bug 6472.
def check_iter(it):
check_method(it.__next__)
check_iter(element.iterfind("tag"))
check_iter(element.iterfind("*"))
check_iter(tree.iterfind("tag"))
check_iter(tree.iterfind("*"))
# These aliases are provided:
self.assertEqual(ET.XML, ET.fromstring)
self.assertEqual(ET.PI, ET.ProcessingInstruction)
def test_set_attribute(self):
element = ET.Element('tag')
self.assertEqual(element.tag, 'tag')
element.tag = 'Tag'
self.assertEqual(element.tag, 'Tag')
element.tag = 'TAG'
self.assertEqual(element.tag, 'TAG')
self.assertIsNone(element.text)
element.text = 'Text'
self.assertEqual(element.text, 'Text')
element.text = 'TEXT'
self.assertEqual(element.text, 'TEXT')
self.assertIsNone(element.tail)
element.tail = 'Tail'
self.assertEqual(element.tail, 'Tail')
element.tail = 'TAIL'
self.assertEqual(element.tail, 'TAIL')
self.assertEqual(element.attrib, {})
element.attrib = {'a': 'b', 'c': 'd'}
self.assertEqual(element.attrib, {'a': 'b', 'c': 'd'})
element.attrib = {'A': 'B', 'C': 'D'}
self.assertEqual(element.attrib, {'A': 'B', 'C': 'D'})
def test_simpleops(self):
# Basic method sanity checks.
elem = ET.XML("<body><tag/></body>")
self.serialize_check(elem, '<body><tag /></body>')
e = ET.Element("tag2")
elem.append(e)
self.serialize_check(elem, '<body><tag /><tag2 /></body>')
elem.remove(e)
self.serialize_check(elem, '<body><tag /></body>')
elem.insert(0, e)
self.serialize_check(elem, '<body><tag2 /><tag /></body>')
elem.remove(e)
elem.extend([e])
self.serialize_check(elem, '<body><tag /><tag2 /></body>')
elem.remove(e)
elem.extend(iter([e]))
self.serialize_check(elem, '<body><tag /><tag2 /></body>')
elem.remove(e)
element = ET.Element("tag", key="value")
self.serialize_check(element, '<tag key="value" />') # 1
subelement = ET.Element("subtag")
element.append(subelement)
self.serialize_check(element, '<tag key="value"><subtag /></tag>') # 2
element.insert(0, subelement)
self.serialize_check(element,
'<tag key="value"><subtag /><subtag /></tag>') # 3
element.remove(subelement)
self.serialize_check(element, '<tag key="value"><subtag /></tag>') # 4
element.remove(subelement)
self.serialize_check(element, '<tag key="value" />') # 5
with self.assertRaises(ValueError) as cm:
element.remove(subelement)
self.assertEqual(str(cm.exception), 'list.remove(x): x not in list')
self.serialize_check(element, '<tag key="value" />') # 6
element[0:0] = [subelement, subelement, subelement]
self.serialize_check(element[1], '<subtag />')
self.assertEqual(element[1:9], [element[1], element[2]])
self.assertEqual(element[:9:2], [element[0], element[2]])
del element[1:2]
self.serialize_check(element,
'<tag key="value"><subtag /><subtag /></tag>')
def test_cdata(self):
# Test CDATA handling (etc).
self.serialize_check(ET.XML("<tag>hello</tag>"),
'<tag>hello</tag>')
self.serialize_check(ET.XML("<tag>hello</tag>"),
'<tag>hello</tag>')
self.serialize_check(ET.XML("<tag><![CDATA[hello]]></tag>"),
'<tag>hello</tag>')
def test_file_init(self):
stringfile = io.BytesIO(SAMPLE_XML.encode("utf-8"))
tree = ET.ElementTree(file=stringfile)
self.assertEqual(tree.find("tag").tag, 'tag')
self.assertEqual(tree.find("section/tag").tag, 'tag')
tree = ET.ElementTree(file=SIMPLE_XMLFILE)
self.assertEqual(tree.find("element").tag, 'element')
self.assertEqual(tree.find("element/../empty-element").tag,
'empty-element')
def test_path_cache(self):
# Check that the path cache behaves sanely.
from xml.etree import ElementPath
elem = ET.XML(SAMPLE_XML)
for i in range(10): ET.ElementTree(elem).find('./'+str(i))
cache_len_10 = len(ElementPath._cache)
for i in range(10): ET.ElementTree(elem).find('./'+str(i))
self.assertEqual(len(ElementPath._cache), cache_len_10)
for i in range(20): ET.ElementTree(elem).find('./'+str(i))
self.assertGreater(len(ElementPath._cache), cache_len_10)
for i in range(600): ET.ElementTree(elem).find('./'+str(i))
self.assertLess(len(ElementPath._cache), 500)
def test_copy(self):
# Test copy handling (etc).
import copy
e1 = ET.XML("<tag>hello<foo/></tag>")
e2 = copy.copy(e1)
e3 = copy.deepcopy(e1)
e1.find("foo").tag = "bar"
self.serialize_check(e1, '<tag>hello<bar /></tag>')
self.serialize_check(e2, '<tag>hello<bar /></tag>')
self.serialize_check(e3, '<tag>hello<foo /></tag>')
def test_attrib(self):
# Test attribute handling.
elem = ET.Element("tag")
elem.get("key") # 1.1
self.assertEqual(elem.get("key", "default"), 'default') # 1.2
elem.set("key", "value")
self.assertEqual(elem.get("key"), 'value') # 1.3
elem = ET.Element("tag", key="value")
self.assertEqual(elem.get("key"), 'value') # 2.1
self.assertEqual(elem.attrib, {'key': 'value'}) # 2.2
attrib = {"key": "value"}
elem = ET.Element("tag", attrib)
attrib.clear() # check for aliasing issues
self.assertEqual(elem.get("key"), 'value') # 3.1
self.assertEqual(elem.attrib, {'key': 'value'}) # 3.2
attrib = {"key": "value"}
elem = ET.Element("tag", **attrib)
attrib.clear() # check for aliasing issues
self.assertEqual(elem.get("key"), 'value') # 4.1
self.assertEqual(elem.attrib, {'key': 'value'}) # 4.2
elem = ET.Element("tag", {"key": "other"}, key="value")
self.assertEqual(elem.get("key"), 'value') # 5.1
self.assertEqual(elem.attrib, {'key': 'value'}) # 5.2
elem = ET.Element('test')
elem.text = "aa"
elem.set('testa', 'testval')
elem.set('testb', 'test2')
self.assertEqual(ET.tostring(elem),
b'<test testa="testval" testb="test2">aa</test>')
self.assertEqual(sorted(elem.keys()), ['testa', 'testb'])
self.assertEqual(sorted(elem.items()),
[('testa', 'testval'), ('testb', 'test2')])
self.assertEqual(elem.attrib['testb'], 'test2')
elem.attrib['testb'] = 'test1'
elem.attrib['testc'] = 'test2'
self.assertEqual(ET.tostring(elem),
b'<test testa="testval" testb="test1" testc="test2">aa</test>')
# Test preserving white space chars in attributes
elem = ET.Element('test')
elem.set('a', '\r')
elem.set('b', '\r\n')
elem.set('c', '\t\n\r ')
elem.set('d', '\n\n\r\r\t\t ')
self.assertEqual(ET.tostring(elem),
b'<test a=" " b=" " c="	 " d=" 		 " />')
def test_makeelement(self):
# Test makeelement handling.
elem = ET.Element("tag")
attrib = {"key": "value"}
subelem = elem.makeelement("subtag", attrib)
self.assertIsNot(subelem.attrib, attrib, msg="attrib aliasing")
elem.append(subelem)
self.serialize_check(elem, '<tag><subtag key="value" /></tag>')
elem.clear()
self.serialize_check(elem, '<tag />')
elem.append(subelem)
self.serialize_check(elem, '<tag><subtag key="value" /></tag>')
elem.extend([subelem, subelem])
self.serialize_check(elem,
'<tag><subtag key="value" /><subtag key="value" /><subtag key="value" /></tag>')
elem[:] = [subelem]
self.serialize_check(elem, '<tag><subtag key="value" /></tag>')
elem[:] = tuple([subelem])
self.serialize_check(elem, '<tag><subtag key="value" /></tag>')
def test_parsefile(self):
# Test parsing from file.
tree = ET.parse(SIMPLE_XMLFILE)
stream = io.StringIO()
tree.write(stream, encoding='unicode')
self.assertEqual(stream.getvalue(),
'<root>\n'
' <element key="value">text</element>\n'
' <element>text</element>tail\n'
' <empty-element />\n'
'</root>')
tree = ET.parse(SIMPLE_NS_XMLFILE)
stream = io.StringIO()
tree.write(stream, encoding='unicode')
self.assertEqual(stream.getvalue(),
'<ns0:root xmlns:ns0="namespace">\n'
' <ns0:element key="value">text</ns0:element>\n'
' <ns0:element>text</ns0:element>tail\n'
' <ns0:empty-element />\n'
'</ns0:root>')
with open(SIMPLE_XMLFILE) as f:
data = f.read()
parser = ET.XMLParser()
self.assertRegex(parser.version, r'^Expat ')
parser.feed(data)
self.serialize_check(parser.close(),
'<root>\n'
' <element key="value">text</element>\n'
' <element>text</element>tail\n'
' <empty-element />\n'
'</root>')
target = ET.TreeBuilder()
parser = ET.XMLParser(target=target)
parser.feed(data)
self.serialize_check(parser.close(),
'<root>\n'
' <element key="value">text</element>\n'
' <element>text</element>tail\n'
' <empty-element />\n'
'</root>')
def test_parseliteral(self):
element = ET.XML("<html><body>text</body></html>")
self.assertEqual(ET.tostring(element, encoding='unicode'),
'<html><body>text</body></html>')
element = ET.fromstring("<html><body>text</body></html>")
self.assertEqual(ET.tostring(element, encoding='unicode'),
'<html><body>text</body></html>')
sequence = ["<html><body>", "text</bo", "dy></html>"]
element = ET.fromstringlist(sequence)
self.assertEqual(ET.tostring(element),
b'<html><body>text</body></html>')
self.assertEqual(b"".join(ET.tostringlist(element)),
b'<html><body>text</body></html>')
self.assertEqual(ET.tostring(element, "ascii"),
b"<?xml version='1.0' encoding='ascii'?>\n"
b"<html><body>text</body></html>")
_, ids = ET.XMLID("<html><body>text</body></html>")
self.assertEqual(len(ids), 0)
_, ids = ET.XMLID("<html><body id='body'>text</body></html>")
self.assertEqual(len(ids), 1)
self.assertEqual(ids["body"].tag, 'body')
def test_iterparse(self):
# Test iterparse interface.
iterparse = ET.iterparse
context = iterparse(SIMPLE_XMLFILE)
action, elem = next(context)
self.assertEqual((action, elem.tag), ('end', 'element'))
self.assertEqual([(action, elem.tag) for action, elem in context], [
('end', 'element'),
('end', 'empty-element'),
('end', 'root'),
])
self.assertEqual(context.root.tag, 'root')
context = iterparse(SIMPLE_NS_XMLFILE)
self.assertEqual([(action, elem.tag) for action, elem in context], [
('end', '{namespace}element'),
('end', '{namespace}element'),
('end', '{namespace}empty-element'),
('end', '{namespace}root'),
])
events = ()
context = iterparse(SIMPLE_XMLFILE, events)
self.assertEqual([(action, elem.tag) for action, elem in context], [])
events = ()
context = iterparse(SIMPLE_XMLFILE, events=events)
self.assertEqual([(action, elem.tag) for action, elem in context], [])
events = ("start", "end")
context = iterparse(SIMPLE_XMLFILE, events)
self.assertEqual([(action, elem.tag) for action, elem in context], [
('start', 'root'),
('start', 'element'),
('end', 'element'),
('start', 'element'),
('end', 'element'),
('start', 'empty-element'),
('end', 'empty-element'),
('end', 'root'),
])
events = ("start", "end", "start-ns", "end-ns")
context = iterparse(SIMPLE_NS_XMLFILE, events)
self.assertEqual([(action, elem.tag) if action in ("start", "end")
else (action, elem)
for action, elem in context], [
('start-ns', ('', 'namespace')),
('start', '{namespace}root'),
('start', '{namespace}element'),
('end', '{namespace}element'),
('start', '{namespace}element'),
('end', '{namespace}element'),
('start', '{namespace}empty-element'),
('end', '{namespace}empty-element'),
('end', '{namespace}root'),
('end-ns', None),
])
events = ('start-ns', 'end-ns')
context = iterparse(io.StringIO(r"<root xmlns=''/>"), events)
res = [action for action, elem in context]
self.assertEqual(res, ['start-ns', 'end-ns'])
events = ("start", "end", "bogus")
with open(SIMPLE_XMLFILE, "rb") as f:
with self.assertRaises(ValueError) as cm:
iterparse(f, events)
self.assertFalse(f.closed)
self.assertEqual(str(cm.exception), "unknown event 'bogus'")
with warnings_helper.check_no_resource_warning(self):
with self.assertRaises(ValueError) as cm:
iterparse(SIMPLE_XMLFILE, events)
self.assertEqual(str(cm.exception), "unknown event 'bogus'")
del cm
source = io.BytesIO(
b"<?xml version='1.0' encoding='iso-8859-1'?>\n"
b"<body xmlns='http://éffbot.org/ns'\n"
b" xmlns:cl\xe9='http://effbot.org/ns'>text</body>\n")
events = ("start-ns",)
context = iterparse(source, events)
self.assertEqual([(action, elem) for action, elem in context], [
('start-ns', ('', 'http://\xe9ffbot.org/ns')),
('start-ns', ('cl\xe9', 'http://effbot.org/ns')),
])
source = io.StringIO("<document />junk")
it = iterparse(source)
action, elem = next(it)
self.assertEqual((action, elem.tag), ('end', 'document'))
with self.assertRaises(ET.ParseError) as cm:
next(it)
self.assertEqual(str(cm.exception),
'junk after document element: line 1, column 12')
self.addCleanup(os_helper.unlink, TESTFN)
with open(TESTFN, "wb") as f:
f.write(b"<document />junk")
it = iterparse(TESTFN)
action, elem = next(it)
self.assertEqual((action, elem.tag), ('end', 'document'))
with warnings_helper.check_no_resource_warning(self):
with self.assertRaises(ET.ParseError) as cm:
next(it)
self.assertEqual(str(cm.exception),
'junk after document element: line 1, column 12')
del cm, it
# Not exhausting the iterator still closes the resource (bpo-43292)
with warnings_helper.check_no_resource_warning(self):
it = iterparse(TESTFN)
del it
with self.assertRaises(FileNotFoundError):
iterparse("nonexistent")
def test_writefile(self):
elem = ET.Element("tag")
elem.text = "text"
self.serialize_check(elem, '<tag>text</tag>')
ET.SubElement(elem, "subtag").text = "subtext"
self.serialize_check(elem, '<tag>text<subtag>subtext</subtag></tag>')
# Test tag suppression
elem.tag = None
self.serialize_check(elem, 'text<subtag>subtext</subtag>')
elem.insert(0, ET.Comment("comment"))
self.serialize_check(elem,
'text<!--comment--><subtag>subtext</subtag>') # assumes 1.3
elem[0] = ET.PI("key", "value")
self.serialize_check(elem, 'text<?key value?><subtag>subtext</subtag>')
def test_custom_builder(self):
# Test parser w. custom builder.
with open(SIMPLE_XMLFILE) as f:
data = f.read()
class Builder(list):
def start(self, tag, attrib):
self.append(("start", tag))
def end(self, tag):
self.append(("end", tag))
def data(self, text):
pass
builder = Builder()
parser = ET.XMLParser(target=builder)
parser.feed(data)
self.assertEqual(builder, [
('start', 'root'),
('start', 'element'),
('end', 'element'),
('start', 'element'),
('end', 'element'),
('start', 'empty-element'),
('end', 'empty-element'),
('end', 'root'),
])
with open(SIMPLE_NS_XMLFILE) as f:
data = f.read()
class Builder(list):
def start(self, tag, attrib):
self.append(("start", tag))
def end(self, tag):
self.append(("end", tag))
def data(self, text):
pass
def pi(self, target, data):
self.append(("pi", target, data))
def comment(self, data):
self.append(("comment", data))
def start_ns(self, prefix, uri):
self.append(("start-ns", prefix, uri))
def end_ns(self, prefix):
self.append(("end-ns", prefix))
builder = Builder()
parser = ET.XMLParser(target=builder)
parser.feed(data)
self.assertEqual(builder, [
('pi', 'pi', 'data'),
('comment', ' comment '),
('start-ns', '', 'namespace'),
('start', '{namespace}root'),
('start', '{namespace}element'),
('end', '{namespace}element'),
('start', '{namespace}element'),
('end', '{namespace}element'),
('start', '{namespace}empty-element'),
('end', '{namespace}empty-element'),
('end', '{namespace}root'),
('end-ns', ''),
])
def test_custom_builder_only_end_ns(self):
class Builder(list):
def end_ns(self, prefix):
self.append(("end-ns", prefix))
builder = Builder()
parser = ET.XMLParser(target=builder)
parser.feed(textwrap.dedent("""\
<?pi data?>
<!-- comment -->
<root xmlns='namespace' xmlns:p='pns' xmlns:a='ans'>
<a:element key='value'>text</a:element>
<p:element>text</p:element>tail
<empty-element/>
</root>
"""))
self.assertEqual(builder, [
('end-ns', 'a'),
('end-ns', 'p'),
('end-ns', ''),
])
def test_initialize_parser_without_target(self):
# Explicit None
parser = ET.XMLParser(target=None)
self.assertIsInstance(parser.target, ET.TreeBuilder)
# Implicit None
parser2 = ET.XMLParser()
self.assertIsInstance(parser2.target, ET.TreeBuilder)
def test_children(self):
# Test Element children iteration
with open(SIMPLE_XMLFILE, "rb") as f:
tree = ET.parse(f)
self.assertEqual([summarize_list(elem)
for elem in tree.getroot().iter()], [
['element', 'element', 'empty-element'],
[],
[],
[],
])
self.assertEqual([summarize_list(elem)
for elem in tree.iter()], [
['element', 'element', 'empty-element'],
[],
[],
[],
])
elem = ET.XML(SAMPLE_XML)
self.assertEqual(len(list(elem)), 3)
self.assertEqual(len(list(elem[2])), 1)
self.assertEqual(elem[:], list(elem))
child1 = elem[0]
child2 = elem[2]
del elem[1:2]
self.assertEqual(len(list(elem)), 2)
self.assertEqual(child1, elem[0])
self.assertEqual(child2, elem[1])
elem[0:2] = [child2, child1]
self.assertEqual(child2, elem[0])
self.assertEqual(child1, elem[1])
self.assertNotEqual(child1, elem[0])
elem.clear()
self.assertEqual(list(elem), [])
def test_writestring(self):
elem = ET.XML("<html><body>text</body></html>")
self.assertEqual(ET.tostring(elem), b'<html><body>text</body></html>')
elem = ET.fromstring("<html><body>text</body></html>")
self.assertEqual(ET.tostring(elem), b'<html><body>text</body></html>')
def test_indent(self):
elem = ET.XML("<root></root>")
ET.indent(elem)
self.assertEqual(ET.tostring(elem), b'<root />')
elem = ET.XML("<html><body>text</body></html>")
ET.indent(elem)
self.assertEqual(ET.tostring(elem), b'<html>\n <body>text</body>\n</html>')
elem = ET.XML("<html> <body>text</body> </html>")
ET.indent(elem)
self.assertEqual(ET.tostring(elem), b'<html>\n <body>text</body>\n</html>')
elem = ET.XML("<html><body>text</body>tail</html>")
ET.indent(elem)
self.assertEqual(ET.tostring(elem), b'<html>\n <body>text</body>tail</html>')
elem = ET.XML("<html><body><p>par</p>\n<p>text</p>\t<p><br/></p></body></html>")
ET.indent(elem)
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b' <body>\n'
b' <p>par</p>\n'
b' <p>text</p>\n'
b' <p>\n'
b' <br />\n'
b' </p>\n'
b' </body>\n'
b'</html>'
)
elem = ET.XML("<html><body><p>pre<br/>post</p><p>text</p></body></html>")
ET.indent(elem)
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b' <body>\n'
b' <p>pre<br />post</p>\n'
b' <p>text</p>\n'
b' </body>\n'
b'</html>'
)
def test_indent_space(self):
elem = ET.XML("<html><body><p>pre<br/>post</p><p>text</p></body></html>")
ET.indent(elem, space='\t')
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b'\t<body>\n'
b'\t\t<p>pre<br />post</p>\n'
b'\t\t<p>text</p>\n'
b'\t</body>\n'
b'</html>'
)
elem = ET.XML("<html><body><p>pre<br/>post</p><p>text</p></body></html>")
ET.indent(elem, space='')
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b'<body>\n'
b'<p>pre<br />post</p>\n'
b'<p>text</p>\n'
b'</body>\n'
b'</html>'
)
def test_indent_space_caching(self):
elem = ET.XML("<html><body><p>par</p><p>text</p><p><br/></p><p /></body></html>")
ET.indent(elem)
self.assertEqual(
{el.tail for el in elem.iter()},
{None, "\n", "\n ", "\n "}
)
self.assertEqual(
{el.text for el in elem.iter()},
{None, "\n ", "\n ", "\n ", "par", "text"}
)
self.assertEqual(
len({el.tail for el in elem.iter()}),
len({id(el.tail) for el in elem.iter()}),
)
def test_indent_level(self):
elem = ET.XML("<html><body><p>pre<br/>post</p><p>text</p></body></html>")
with self.assertRaises(ValueError):
ET.indent(elem, level=-1)
self.assertEqual(
ET.tostring(elem),
b"<html><body><p>pre<br />post</p><p>text</p></body></html>"
)
ET.indent(elem, level=2)
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b' <body>\n'
b' <p>pre<br />post</p>\n'
b' <p>text</p>\n'
b' </body>\n'
b' </html>'
)
elem = ET.XML("<html><body><p>pre<br/>post</p><p>text</p></body></html>")
ET.indent(elem, level=1, space=' ')
self.assertEqual(
ET.tostring(elem),
b'<html>\n'
b' <body>\n'
b' <p>pre<br />post</p>\n'
b' <p>text</p>\n'
b' </body>\n'
b' </html>'
)
def test_tostring_default_namespace(self):
elem = ET.XML('<body xmlns="http://effbot.org/ns"><tag/></body>')
self.assertEqual(
ET.tostring(elem, encoding='unicode'),
'<ns0:body xmlns:ns0="http://effbot.org/ns"><ns0:tag /></ns0:body>'
)
self.assertEqual(
ET.tostring(elem, encoding='unicode', default_namespace='http://effbot.org/ns'),
'<body xmlns="http://effbot.org/ns"><tag /></body>'
)
def test_tostring_default_namespace_different_namespace(self):
elem = ET.XML('<body xmlns="http://effbot.org/ns"><tag/></body>')
self.assertEqual(
ET.tostring(elem, encoding='unicode', default_namespace='foobar'),
'<ns1:body xmlns="foobar" xmlns:ns1="http://effbot.org/ns"><ns1:tag /></ns1:body>'
)
def test_tostring_default_namespace_original_no_namespace(self):
elem = ET.XML('<body><tag/></body>')
EXPECTED_MSG = '^cannot use non-qualified names with default_namespace option$'
with self.assertRaisesRegex(ValueError, EXPECTED_MSG):
ET.tostring(elem, encoding='unicode', default_namespace='foobar')
def test_tostring_no_xml_declaration(self):
elem = ET.XML('<body><tag/></body>')
self.assertEqual(
ET.tostring(elem, encoding='unicode'),
'<body><tag /></body>'
)
def test_tostring_xml_declaration(self):
elem = ET.XML('<body><tag/></body>')
self.assertEqual(
ET.tostring(elem, encoding='utf8', xml_declaration=True),
b"<?xml version='1.0' encoding='utf8'?>\n<body><tag /></body>"
)
def test_tostring_xml_declaration_unicode_encoding(self):
elem = ET.XML('<body><tag/></body>')
self.assertEqual(
ET.tostring(elem, encoding='unicode', xml_declaration=True),
"<?xml version='1.0' encoding='utf-8'?>\n<body><tag /></body>"
)
def test_tostring_xml_declaration_cases(self):
elem = ET.XML('<body><tag>ø</tag></body>')
TESTCASES = [
# (expected_retval, encoding, xml_declaration)
# ... xml_declaration = None
(b'<body><tag>ø</tag></body>', None, None),
(b'<body><tag>\xc3\xb8</tag></body>', 'UTF-8', None),
(b'<body><tag>ø</tag></body>', 'US-ASCII', None),
(b"<?xml version='1.0' encoding='ISO-8859-1'?>\n"
b"<body><tag>\xf8</tag></body>", 'ISO-8859-1', None),
('<body><tag>ø</tag></body>', 'unicode', None),
# ... xml_declaration = False
(b"<body><tag>ø</tag></body>", None, False),
(b"<body><tag>\xc3\xb8</tag></body>", 'UTF-8', False),
(b"<body><tag>ø</tag></body>", 'US-ASCII', False),
(b"<body><tag>\xf8</tag></body>", 'ISO-8859-1', False),
("<body><tag>ø</tag></body>", 'unicode', False),
# ... xml_declaration = True
(b"<?xml version='1.0' encoding='us-ascii'?>\n"
b"<body><tag>ø</tag></body>", None, True),
(b"<?xml version='1.0' encoding='UTF-8'?>\n"
b"<body><tag>\xc3\xb8</tag></body>", 'UTF-8', True),
(b"<?xml version='1.0' encoding='US-ASCII'?>\n"
b"<body><tag>ø</tag></body>", 'US-ASCII', True),
(b"<?xml version='1.0' encoding='ISO-8859-1'?>\n"
b"<body><tag>\xf8</tag></body>", 'ISO-8859-1', True),
("<?xml version='1.0' encoding='utf-8'?>\n"
"<body><tag>ø</tag></body>", 'unicode', True),
]
for expected_retval, encoding, xml_declaration in TESTCASES:
with self.subTest(f'encoding={encoding} '
f'xml_declaration={xml_declaration}'):