from __future__ import unicode_literals from datetime import datetime import os from django.utils import html from django.utils._os import upath from django.utils.unittest import TestCase class TestUtilsHtml(TestCase): def check_output(self, function, value, output=None): """ Check that function(value) equals output. If output is None, check that 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) # 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("{0} {1} {third} {fourth}", "< Dangerous >", html.mark_safe("safe"), third="< dangerous again", fourth=html.mark_safe("safe again") ), "< Dangerous > safe < dangerous again safe again" ) def test_linebreaks(self): f = html.linebreaks items = ( ("para1\n\npara2\r\rpara3", "

para1

\n\n

para2

\n\n

para3

"), ("para1\nsub1\rsub2\n\npara2", "

para1
sub1
sub2

\n\n

para2

"), ("para1\r\n\r\npara2\rsub1\r\rpara4", "

para1

\n\n

para2
sub1

\n\n

para4

"), ("para1\tmore\n\npara2", "

para1\tmore

\n\n

para2

"), ) for value, output in items: self.check_output(f, value, output) def test_strip_tags(self): f = html.strip_tags items = ( ('a', 'a'), ('a', 'a'), ('e', 'e'), ('b', 'b'), ('a

b

c', 'abc'), ('a

b

c', 'abc'), ('de

f', 'def'), ('foobar', 'foobar'), ) for value, output in items: self.check_output(f, value, 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: start = datetime.now() stripped = html.strip_tags(fp.read()) 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 = (' ', ' ', ' ', ' x') for value in items: self.check_output(f, value) # Strings that have spaces to strip. items = ( (' ', ''), ('

hello

\n

world

', '

hello

world

'), ('\n

\t

\n

\n', '\n

\n'), ) for value, output in items: self.check_output(f, value, output) def test_strip_entities(self): f = html.strip_entities # Strings that should come out untouched. values = ("&", "&a", "&a", "a&#a") for value in values: self.check_output(f, value) # Valid entities that should be stripped from the patterns. entities = ("", " ", "&a;", "&fdasdfasdfasdf;") patterns = ( ("asdf %(entity)s ", "asdf "), ("%(entity)s%(entity)s", ""), ("&%(entity)s%(entity)s", "&"), ("%(entity)s3", "3"), ) for entity in entities: for in_pattern, output in patterns: self.check_output(f, in_pattern % {'entity': entity}, output) def test_fix_ampersands(self): f = html.fix_ampersands # Strings without ampersands or with ampersands already encoded. values = ("a", "b", "&a;", "& &x; ", "asdf") patterns = ( ("%s", "%s"), ("&%s", "&%s"), ("&%s&", "&%s&"), ) for value in values: for in_pattern, out_pattern in patterns: self.check_output(f, in_pattern % value, out_pattern % value) # Strings with ampersands that need encoding. items = ( ("&#;", "&#;"), ("ͫ ;", "&#875 ;"), ("abc;", "&#4abc;"), ) for value, output in items: self.check_output(f, 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'', '\\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) def test_clean_html(self): f = html.clean_html items = ( ('

I believe in semantic markup!

', '

I believe in semantic markup!

'), ('I escape & I don\'t target', 'I escape & I don\'t target'), ('

I kill whitespace


 

', '

I kill whitespace

'), # also a regression test for #7267: this used to raise an UnicodeDecodeError ('

* foo

* bar

', '
    \n
  • foo
  • bar
  • \n
'), ) for value, output in items: self.check_output(f, value, output) def test_remove_tags(self): f = html.remove_tags items = ( ("Yes", "b i", "Yes"), ("x

y

", "a b", "x

y

"), ) for value, tags, output in items: self.assertEqual(f(value, tags), output)