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import os
from datetime import datetime
from django.test import SimpleTestCase
from django.utils import html, safestring
from django.utils._os import upath
from django.utils.encoding import force_text
from django.utils.functional import lazystr
class TestUtilsHtml(SimpleTestCase):
def check_output(self, function, value, output=None):
"""
function(value) equals output. If output is None, function(value)
equals value.
"""
if output is None:
output = value
self.assertEqual(function(value), output)
def test_escape(self):
f = html.escape
items = (
('&', '&'),
('<', '<'),
('>', '>'),
('"', '"'),
("'", '''),
)
# Substitution patterns for testing the above items.
patterns = ("%s", "asdf%sfdsa", "%s1", "1%sb")
for value, output in items:
for pattern in patterns:
self.check_output(f, pattern % value, pattern % output)
self.check_output(f, lazystr(pattern % value), pattern % output)
# Check repeated values.
self.check_output(f, value * 2, output * 2)
# Verify it doesn't double replace &.
self.check_output(f, '<&', '<&')
def test_format_html(self):
self.assertEqual(
html.format_html("{} {} {third} {fourth}",
"< Dangerous >",
html.mark_safe("<b>safe</b>"),
third="< dangerous again",
fourth=html.mark_safe("<i>safe again</i>")
),
"< Dangerous > <b>safe</b> < dangerous again <i>safe again</i>"
)
def test_linebreaks(self):
f = html.linebreaks
items = (
("para1\n\npara2\r\rpara3", "<p>para1</p>\n\n<p>para2</p>\n\n<p>para3</p>"),
("para1\nsub1\rsub2\n\npara2", "<p>para1<br />sub1<br />sub2</p>\n\n<p>para2</p>"),
("para1\r\n\r\npara2\rsub1\r\rpara4", "<p>para1</p>\n\n<p>para2<br />sub1</p>\n\n<p>para4</p>"),
("para1\tmore\n\npara2", "<p>para1\tmore</p>\n\n<p>para2</p>"),
)
for value, output in items:
self.check_output(f, value, output)
self.check_output(f, lazystr(value), output)
def test_strip_tags(self):
f = html.strip_tags
items = (
('<p>See: 'é is an apostrophe followed by e acute</p>',
'See: 'é is an apostrophe followed by e acute'),
('<adf>a', 'a'),
('</adf>a', 'a'),
('<asdf><asdf>e', 'e'),
('hi, <f x', 'hi, <f x'),
('234<235, right?', '234<235, right?'),
('a4<a5 right?', 'a4<a5 right?'),
('b7>b2!', 'b7>b2!'),
('</fe', '</fe'),
('<x>b<y>', 'b'),
('a<p onclick="alert(\'<test>\')">b</p>c', 'abc'),
('a<p a >b</p>c', 'abc'),
('d<a:b c:d>e</p>f', 'def'),
('<strong>foo</strong><a href="http://example.com">bar</a>', 'foobar'),
# caused infinite loop on Pythons not patched with
# http://bugs.python.org/issue20288
('&gotcha&#;<>', '&gotcha&#;<>'),
)
for value, output in items:
self.check_output(f, value, output)
self.check_output(f, lazystr(value), output)
# Some convoluted syntax for which parsing may differ between python versions
output = html.strip_tags('<sc<!-- -->ript>test<<!-- -->/script>')
self.assertNotIn('<script>', output)
self.assertIn('test', output)
output = html.strip_tags('<script>alert()</script>&h')
self.assertNotIn('<script>', output)
self.assertIn('alert()', output)
# Test with more lengthy content (also catching performance regressions)
for filename in ('strip_tags1.html', 'strip_tags2.txt'):
path = os.path.join(os.path.dirname(upath(__file__)), 'files', filename)
with open(path, 'r') as fp:
content = force_text(fp.read())
start = datetime.now()
stripped = html.strip_tags(content)
elapsed = datetime.now() - start
self.assertEqual(elapsed.seconds, 0)
self.assertIn("Please try again.", stripped)
self.assertNotIn('<', stripped)
def test_strip_spaces_between_tags(self):
f = html.strip_spaces_between_tags
# Strings that should come out untouched.
items = (' <adf>', '<adf> ', ' </adf> ', ' <f> x</f>')
for value in items:
self.check_output(f, value)
self.check_output(f, lazystr(value))
# Strings that have spaces to strip.
items = (
('<d> </d>', '<d></d>'),
('<p>hello </p>\n<p> world</p>', '<p>hello </p><p> world</p>'),
('\n<p>\t</p>\n<p> </p>\n', '\n<p></p><p></p>\n'),
)
for value, output in items:
self.check_output(f, value, output)
self.check_output(f, lazystr(value), output)
def test_escapejs(self):
f = html.escapejs
items = (
('"double quotes" and \'single quotes\'', '\\u0022double quotes\\u0022 and \\u0027single quotes\\u0027'),
(r'\ : backslashes, too', '\\u005C : backslashes, too'),
(
'and lots of whitespace: \r\n\t\v\f\b',
'and lots of whitespace: \\u000D\\u000A\\u0009\\u000B\\u000C\\u0008'
),
(r'<script>and this</script>', '\\u003Cscript\\u003Eand this\\u003C/script\\u003E'),
(
'paragraph separator:\u2029and line separator:\u2028',
'paragraph separator:\\u2029and line separator:\\u2028'
),
)
for value, output in items:
self.check_output(f, value, output)
self.check_output(f, lazystr(value), output)
def test_smart_urlquote(self):
quote = html.smart_urlquote
# IDNs are properly quoted
self.assertEqual(quote('http://öäü.com/'), 'http://xn--4ca9at.com/')
self.assertEqual(quote('http://öäü.com/öäü/'), 'http://xn--4ca9at.com/%C3%B6%C3%A4%C3%BC/')
# Everything unsafe is quoted, !*'();:@&=+$,/?#[]~ is considered safe as per RFC
self.assertEqual(quote('http://example.com/path/öäü/'), 'http://example.com/path/%C3%B6%C3%A4%C3%BC/')
self.assertEqual(quote('http://example.com/%C3%B6/ä/'), 'http://example.com/%C3%B6/%C3%A4/')
self.assertEqual(quote('http://example.com/?x=1&y=2+3&z='), 'http://example.com/?x=1&y=2+3&z=')
self.assertEqual(quote('http://example.com/?x=<>"\''), 'http://example.com/?x=%3C%3E%22%27')
self.assertEqual(quote('http://example.com/?q=http://example.com/?x=1%26q=django'),
'http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango')
self.assertEqual(quote('http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango'),
'http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango')
def test_conditional_escape(self):
s = '<h1>interop</h1>'
self.assertEqual(html.conditional_escape(s),
'<h1>interop</h1>')
self.assertEqual(html.conditional_escape(safestring.mark_safe(s)), s)
def test_html_safe(self):
@html.html_safe
class HtmlClass:
def __str__(self):
return "<h1>I'm a html class!</h1>"
html_obj = HtmlClass()
self.assertTrue(hasattr(HtmlClass, '__html__'))
self.assertTrue(hasattr(html_obj, '__html__'))
self.assertEqual(force_text(html_obj), html_obj.__html__())
def test_html_safe_subclass(self):
class BaseClass:
def __html__(self):
# defines __html__ on its own
return 'some html content'
def __str__(self):
return 'some non html content'
@html.html_safe
class Subclass(BaseClass):
def __str__(self):
# overrides __str__ and is marked as html_safe
return 'some html safe content'
subclass_obj = Subclass()
self.assertEqual(force_text(subclass_obj), subclass_obj.__html__())
def test_html_safe_defines_html_error(self):
msg = "can't apply @html_safe to HtmlClass because it defines __html__()."
with self.assertRaisesMessage(ValueError, msg):
@html.html_safe
class HtmlClass:
def __html__(self):
return "<h1>I'm a html class!</h1>"
def test_html_safe_doesnt_define_str(self):
msg = "can't apply @html_safe to HtmlClass because it doesn't define __str__()."
with self.assertRaisesMessage(ValueError, msg):
@html.html_safe
class HtmlClass:
pass
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