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280 lines
12 KiB
Python
280 lines
12 KiB
Python
import os
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from datetime import datetime
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from django.test import SimpleTestCase
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from django.utils.functional import lazystr
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from django.utils.html import (
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conditional_escape, escape, escapejs, format_html, html_safe, json_script,
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linebreaks, smart_urlquote, strip_spaces_between_tags, strip_tags, urlize,
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)
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from django.utils.safestring import mark_safe
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class TestUtilsHtml(SimpleTestCase):
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def check_output(self, function, value, output=None):
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"""
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function(value) equals output. If output is None, function(value)
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equals value.
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"""
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if output is None:
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output = value
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self.assertEqual(function(value), output)
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def test_escape(self):
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items = (
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('&', '&'),
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('<', '<'),
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('>', '>'),
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('"', '"'),
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("'", '''),
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)
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# Substitution patterns for testing the above items.
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patterns = ("%s", "asdf%sfdsa", "%s1", "1%sb")
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for value, output in items:
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with self.subTest(value=value, output=output):
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for pattern in patterns:
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with self.subTest(value=value, output=output, pattern=pattern):
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self.check_output(escape, pattern % value, pattern % output)
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self.check_output(escape, lazystr(pattern % value), pattern % output)
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# Check repeated values.
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self.check_output(escape, value * 2, output * 2)
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# Verify it doesn't double replace &.
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self.check_output(escape, '<&', '<&')
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def test_format_html(self):
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self.assertEqual(
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format_html(
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"{} {} {third} {fourth}",
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"< Dangerous >",
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mark_safe("<b>safe</b>"),
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third="< dangerous again",
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fourth=mark_safe("<i>safe again</i>"),
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),
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"< Dangerous > <b>safe</b> < dangerous again <i>safe again</i>"
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)
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def test_linebreaks(self):
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items = (
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("para1\n\npara2\r\rpara3", "<p>para1</p>\n\n<p>para2</p>\n\n<p>para3</p>"),
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("para1\nsub1\rsub2\n\npara2", "<p>para1<br>sub1<br>sub2</p>\n\n<p>para2</p>"),
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("para1\r\n\r\npara2\rsub1\r\rpara4", "<p>para1</p>\n\n<p>para2<br>sub1</p>\n\n<p>para4</p>"),
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("para1\tmore\n\npara2", "<p>para1\tmore</p>\n\n<p>para2</p>"),
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)
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for value, output in items:
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with self.subTest(value=value, output=output):
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self.check_output(linebreaks, value, output)
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self.check_output(linebreaks, lazystr(value), output)
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def test_strip_tags(self):
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items = (
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('<p>See: 'é is an apostrophe followed by e acute</p>',
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'See: 'é is an apostrophe followed by e acute'),
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('<p>See: 'é is an apostrophe followed by e acute</p>',
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'See: 'é is an apostrophe followed by e acute'),
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('<adf>a', 'a'),
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('</adf>a', 'a'),
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('<asdf><asdf>e', 'e'),
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('hi, <f x', 'hi, <f x'),
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('234<235, right?', '234<235, right?'),
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('a4<a5 right?', 'a4<a5 right?'),
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('b7>b2!', 'b7>b2!'),
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('</fe', '</fe'),
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('<x>b<y>', 'b'),
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('a<p onclick="alert(\'<test>\')">b</p>c', 'abc'),
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('a<p a >b</p>c', 'abc'),
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('d<a:b c:d>e</p>f', 'def'),
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('<strong>foo</strong><a href="http://example.com">bar</a>', 'foobar'),
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# caused infinite loop on Pythons not patched with
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# https://bugs.python.org/issue20288
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('&gotcha&#;<>', '&gotcha&#;<>'),
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('<sc<!-- -->ript>test<<!-- -->/script>', 'ript>test'),
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('<script>alert()</script>&h', 'alert()h'),
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('><!' + ('&' * 16000) + 'D', '><!' + ('&' * 16000) + 'D'),
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('X<<<<br>br>br>br>X', 'XX'),
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)
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for value, output in items:
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with self.subTest(value=value, output=output):
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self.check_output(strip_tags, value, output)
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self.check_output(strip_tags, lazystr(value), output)
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def test_strip_tags_files(self):
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# Test with more lengthy content (also catching performance regressions)
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for filename in ('strip_tags1.html', 'strip_tags2.txt'):
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with self.subTest(filename=filename):
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path = os.path.join(os.path.dirname(__file__), 'files', filename)
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with open(path) as fp:
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content = fp.read()
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start = datetime.now()
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stripped = strip_tags(content)
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elapsed = datetime.now() - start
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self.assertEqual(elapsed.seconds, 0)
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self.assertIn("Please try again.", stripped)
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self.assertNotIn('<', stripped)
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def test_strip_spaces_between_tags(self):
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# Strings that should come out untouched.
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items = (' <adf>', '<adf> ', ' </adf> ', ' <f> x</f>')
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for value in items:
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with self.subTest(value=value):
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self.check_output(strip_spaces_between_tags, value)
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self.check_output(strip_spaces_between_tags, lazystr(value))
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# Strings that have spaces to strip.
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items = (
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('<d> </d>', '<d></d>'),
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('<p>hello </p>\n<p> world</p>', '<p>hello </p><p> world</p>'),
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('\n<p>\t</p>\n<p> </p>\n', '\n<p></p><p></p>\n'),
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)
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for value, output in items:
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with self.subTest(value=value, output=output):
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self.check_output(strip_spaces_between_tags, value, output)
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self.check_output(strip_spaces_between_tags, lazystr(value), output)
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def test_escapejs(self):
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items = (
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('"double quotes" and \'single quotes\'', '\\u0022double quotes\\u0022 and \\u0027single quotes\\u0027'),
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(r'\ : backslashes, too', '\\u005C : backslashes, too'),
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(
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'and lots of whitespace: \r\n\t\v\f\b',
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'and lots of whitespace: \\u000D\\u000A\\u0009\\u000B\\u000C\\u0008'
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),
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(r'<script>and this</script>', '\\u003Cscript\\u003Eand this\\u003C/script\\u003E'),
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(
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'paragraph separator:\u2029and line separator:\u2028',
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'paragraph separator:\\u2029and line separator:\\u2028'
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),
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('`', '\\u0060'),
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)
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for value, output in items:
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with self.subTest(value=value, output=output):
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self.check_output(escapejs, value, output)
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self.check_output(escapejs, lazystr(value), output)
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def test_json_script(self):
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tests = (
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# "<", ">" and "&" are quoted inside JSON strings
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(('&<>', '<script id="test_id" type="application/json">"\\u0026\\u003C\\u003E"</script>')),
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# "<", ">" and "&" are quoted inside JSON objects
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(
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{'a': '<script>test&ing</script>'},
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'<script id="test_id" type="application/json">'
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'{"a": "\\u003Cscript\\u003Etest\\u0026ing\\u003C/script\\u003E"}</script>'
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),
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# Lazy strings are quoted
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(lazystr('&<>'), '<script id="test_id" type="application/json">"\\u0026\\u003C\\u003E"</script>'),
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(
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{'a': lazystr('<script>test&ing</script>')},
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'<script id="test_id" type="application/json">'
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'{"a": "\\u003Cscript\\u003Etest\\u0026ing\\u003C/script\\u003E"}</script>'
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),
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)
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for arg, expected in tests:
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with self.subTest(arg=arg):
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self.assertEqual(json_script(arg, 'test_id'), expected)
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def test_smart_urlquote(self):
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items = (
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('http://öäü.com/', 'http://xn--4ca9at.com/'),
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('http://öäü.com/öäü/', 'http://xn--4ca9at.com/%C3%B6%C3%A4%C3%BC/'),
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# Everything unsafe is quoted, !*'();:@&=+$,/?#[]~ is considered
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# safe as per RFC.
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('http://example.com/path/öäü/', 'http://example.com/path/%C3%B6%C3%A4%C3%BC/'),
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('http://example.com/%C3%B6/ä/', 'http://example.com/%C3%B6/%C3%A4/'),
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('http://example.com/?x=1&y=2+3&z=', 'http://example.com/?x=1&y=2+3&z='),
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('http://example.com/?x=<>"\'', 'http://example.com/?x=%3C%3E%22%27'),
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('http://example.com/?q=http://example.com/?x=1%26q=django',
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'http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango'),
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('http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango',
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'http://example.com/?q=http%3A%2F%2Fexample.com%2F%3Fx%3D1%26q%3Ddjango'),
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('http://.www.f oo.bar/', 'http://.www.f%20oo.bar/'),
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)
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# IDNs are properly quoted
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for value, output in items:
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with self.subTest(value=value, output=output):
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self.assertEqual(smart_urlquote(value), output)
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def test_conditional_escape(self):
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s = '<h1>interop</h1>'
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self.assertEqual(conditional_escape(s), '<h1>interop</h1>')
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self.assertEqual(conditional_escape(mark_safe(s)), s)
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self.assertEqual(conditional_escape(lazystr(mark_safe(s))), s)
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def test_html_safe(self):
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@html_safe
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class HtmlClass:
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def __str__(self):
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return "<h1>I'm a html class!</h1>"
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html_obj = HtmlClass()
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self.assertTrue(hasattr(HtmlClass, '__html__'))
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self.assertTrue(hasattr(html_obj, '__html__'))
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self.assertEqual(str(html_obj), html_obj.__html__())
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def test_html_safe_subclass(self):
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class BaseClass:
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def __html__(self):
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# defines __html__ on its own
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return 'some html content'
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def __str__(self):
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return 'some non html content'
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@html_safe
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class Subclass(BaseClass):
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def __str__(self):
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# overrides __str__ and is marked as html_safe
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return 'some html safe content'
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subclass_obj = Subclass()
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self.assertEqual(str(subclass_obj), subclass_obj.__html__())
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def test_html_safe_defines_html_error(self):
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msg = "can't apply @html_safe to HtmlClass because it defines __html__()."
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with self.assertRaisesMessage(ValueError, msg):
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@html_safe
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class HtmlClass:
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def __html__(self):
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return "<h1>I'm a html class!</h1>"
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def test_html_safe_doesnt_define_str(self):
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msg = "can't apply @html_safe to HtmlClass because it doesn't define __str__()."
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with self.assertRaisesMessage(ValueError, msg):
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@html_safe
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class HtmlClass:
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pass
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def test_urlize(self):
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tests = (
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(
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'Search for google.com/?q=! and see.',
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'Search for <a href="http://google.com/?q=">google.com/?q=</a>! and see.'
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),
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(
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'Search for google.com/?q=1<! and see.',
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'Search for <a href="http://google.com/?q=1%3C">google.com/?q=1<</a>! and see.'
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),
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(
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lazystr('Search for google.com/?q=!'),
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'Search for <a href="http://google.com/?q=">google.com/?q=</a>!'
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),
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('foo@example.com', '<a href="mailto:foo@example.com">foo@example.com</a>'),
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)
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for value, output in tests:
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with self.subTest(value=value):
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self.assertEqual(urlize(value), output)
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def test_urlize_unchanged_inputs(self):
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tests = (
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('a' + '@a' * 50000) + 'a', # simple_email_re catastrophic test
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('a' + '.' * 1000000) + 'a', # trailing_punctuation catastrophic test
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'foo@',
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'@foo.com',
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'foo@.example.com',
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'foo@localhost',
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'foo@localhost.',
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)
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for value in tests:
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with self.subTest(value=value):
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self.assertEqual(urlize(value), value)
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