django/tests/templates/filters.py

# coding: utf-8
"""
Tests for template filters (as opposed to template tags).

The tests are hidden inside a function so that things like timestamps and
timezones are only evaluated at the moment of execution and will therefore be
consistent.
"""
from __future__ import unicode_literals

from datetime import date, datetime, time, timedelta

from django.test.utils import str_prefix
from django.utils.tzinfo import LocalTimezone, FixedOffset
from django.utils.safestring import mark_safe
from django.utils.encoding import python_2_unicode_compatible

# These two classes are used to test auto-escaping of __unicode__ output.
@python_2_unicode_compatible
class UnsafeClass:
    def __str__(self):
        return 'you & me'

@python_2_unicode_compatible
class SafeClass:
    def __str__(self):
        return mark_safe('you > me')

# RESULT SYNTAX --
# 'template_name': ('template contents', 'context dict',
#                   'expected string output' or Exception class)
def get_filter_tests():
    now = datetime.now()
    now_tz = datetime.now(LocalTimezone(now))
    now_tz_i = datetime.now(FixedOffset((3 * 60) + 15)) # imaginary time zone
    today = date.today()

    return {
        # Default compare with datetime.now()
        'filter-timesince01' : ('{{ a|timesince }}', {'a': datetime.now() + timedelta(minutes=-1, seconds = -10)}, '1 minute'),
        'filter-timesince02' : ('{{ a|timesince }}', {'a': datetime.now() - timedelta(days=1, minutes = 1)}, '1 day'),
        'filter-timesince03' : ('{{ a|timesince }}', {'a': datetime.now() - timedelta(hours=1, minutes=25, seconds = 10)}, '1 hour, 25 minutes'),

        # Compare to a given parameter
        'filter-timesince04' : ('{{ a|timesince:b }}', {'a':now - timedelta(days=2), 'b':now - timedelta(days=1)}, '1 day'),
        'filter-timesince05' : ('{{ a|timesince:b }}', {'a':now - timedelta(days=2, minutes=1), 'b':now - timedelta(days=2)}, '1 minute'),

        # Check that timezone is respected
        'filter-timesince06' : ('{{ a|timesince:b }}', {'a':now_tz - timedelta(hours=8), 'b':now_tz}, '8 hours'),

        # Regression for #7443
        'filter-timesince07': ('{{ earlier|timesince }}', { 'earlier': now - timedelta(days=7) }, '1 week'),
        'filter-timesince08': ('{{ earlier|timesince:now }}', { 'now': now, 'earlier': now - timedelta(days=7) }, '1 week'),
        'filter-timesince09': ('{{ later|timesince }}', { 'later': now + timedelta(days=7) }, '0 minutes'),
        'filter-timesince10': ('{{ later|timesince:now }}', { 'now': now, 'later': now + timedelta(days=7) }, '0 minutes'),

        # Ensures that differing timezones are calculated correctly
        'filter-timesince11' : ('{{ a|timesince }}', {'a': now}, '0 minutes'),
        'filter-timesince12' : ('{{ a|timesince }}', {'a': now_tz}, '0 minutes'),
        'filter-timesince13' : ('{{ a|timesince }}', {'a': now_tz_i}, '0 minutes'),
        'filter-timesince14' : ('{{ a|timesince:b }}', {'a': now_tz, 'b': now_tz_i}, '0 minutes'),
        'filter-timesince15' : ('{{ a|timesince:b }}', {'a': now, 'b': now_tz_i}, ''),
        'filter-timesince16' : ('{{ a|timesince:b }}', {'a': now_tz_i, 'b': now}, ''),

        # Regression for #9065 (two date objects).
        'filter-timesince17' : ('{{ a|timesince:b }}', {'a': today, 'b': today}, '0 minutes'),
        'filter-timesince18' : ('{{ a|timesince:b }}', {'a': today, 'b': today + timedelta(hours=24)}, '1 day'),

        # Default compare with datetime.now()
        'filter-timeuntil01' : ('{{ a|timeuntil }}', {'a':datetime.now() + timedelta(minutes=2, seconds = 10)}, '2 minutes'),
        'filter-timeuntil02' : ('{{ a|timeuntil }}', {'a':(datetime.now() + timedelta(days=1, seconds = 10))}, '1 day'),
        'filter-timeuntil03' : ('{{ a|timeuntil }}', {'a':(datetime.now() + timedelta(hours=8, minutes=10, seconds = 10))}, '8 hours, 10 minutes'),

        # Compare to a given parameter
        'filter-timeuntil04' : ('{{ a|timeuntil:b }}', {'a':now - timedelta(days=1), 'b':now - timedelta(days=2)}, '1 day'),
        'filter-timeuntil05' : ('{{ a|timeuntil:b }}', {'a':now - timedelta(days=2), 'b':now - timedelta(days=2, minutes=1)}, '1 minute'),

        # Regression for #7443
        'filter-timeuntil06': ('{{ earlier|timeuntil }}', { 'earlier': now - timedelta(days=7) }, '0 minutes'),
        'filter-timeuntil07': ('{{ earlier|timeuntil:now }}', { 'now': now, 'earlier': now - timedelta(days=7) }, '0 minutes'),
        'filter-timeuntil08': ('{{ later|timeuntil }}', { 'later': now + timedelta(days=7, hours=1) }, '1 week'),
        'filter-timeuntil09': ('{{ later|timeuntil:now }}', { 'now': now, 'later': now + timedelta(days=7) }, '1 week'),

        # Ensures that differing timezones are calculated correctly
        'filter-timeuntil10' : ('{{ a|timeuntil }}', {'a': now_tz_i}, '0 minutes'),
        'filter-timeuntil11' : ('{{ a|timeuntil:b }}', {'a': now_tz_i, 'b': now_tz}, '0 minutes'),

        # Regression for #9065 (two date objects).
        'filter-timeuntil12' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today}, '0 minutes'),
        'filter-timeuntil13' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today - timedelta(hours=24)}, '1 day'),

        'filter-addslash01': ("{% autoescape off %}{{ a|addslashes }} {{ b|addslashes }}{% endautoescape %}", {"a": "<a>'", "b": mark_safe("<a>'")}, r"<a>\' <a>\'"),
        'filter-addslash02': ("{{ a|addslashes }} {{ b|addslashes }}", {"a": "<a>'", "b": mark_safe("<a>'")}, r"&lt;a&gt;\&#39; <a>\'"),

        'filter-capfirst01': ("{% autoescape off %}{{ a|capfirst }} {{ b|capfirst }}{% endautoescape %}", {"a": "fred>", "b": mark_safe("fred&gt;")}, "Fred> Fred&gt;"),
        'filter-capfirst02': ("{{ a|capfirst }} {{ b|capfirst }}", {"a": "fred>", "b": mark_safe("fred&gt;")}, "Fred&gt; Fred&gt;"),

        # Note that applying fix_ampsersands in autoescape mode leads to
        # double escaping.
        'filter-fix_ampersands01': ("{% autoescape off %}{{ a|fix_ampersands }} {{ b|fix_ampersands }}{% endautoescape %}", {"a": "a&b", "b": mark_safe("a&b")}, "a&amp;b a&amp;b"),
        'filter-fix_ampersands02': ("{{ a|fix_ampersands }} {{ b|fix_ampersands }}", {"a": "a&b", "b": mark_safe("a&b")}, "a&amp;amp;b a&amp;b"),

        'filter-floatformat01': ("{% autoescape off %}{{ a|floatformat }} {{ b|floatformat }}{% endautoescape %}", {"a": "1.42", "b": mark_safe("1.42")}, "1.4 1.4"),
        'filter-floatformat02': ("{{ a|floatformat }} {{ b|floatformat }}", {"a": "1.42", "b": mark_safe("1.42")}, "1.4 1.4"),

        # The contents of "linenumbers" is escaped according to the current
        # autoescape setting.
        'filter-linenumbers01': ("{{ a|linenumbers }} {{ b|linenumbers }}", {"a": "one\n<two>\nthree", "b": mark_safe("one\n&lt;two&gt;\nthree")}, "1. one\n2. &lt;two&gt;\n3. three 1. one\n2. &lt;two&gt;\n3. three"),
        'filter-linenumbers02': ("{% autoescape off %}{{ a|linenumbers }} {{ b|linenumbers }}{% endautoescape %}", {"a": "one\n<two>\nthree", "b": mark_safe("one\n&lt;two&gt;\nthree")}, "1. one\n2. <two>\n3. three 1. one\n2. &lt;two&gt;\n3. three"),

        'filter-lower01': ("{% autoescape off %}{{ a|lower }} {{ b|lower }}{% endautoescape %}", {"a": "Apple & banana", "b": mark_safe("Apple &amp; banana")}, "apple & banana apple &amp; banana"),
        'filter-lower02': ("{{ a|lower }} {{ b|lower }}", {"a": "Apple & banana", "b": mark_safe("Apple &amp; banana")}, "apple &amp; banana apple &amp; banana"),

        # The make_list filter can destroy existing escaping, so the results are
        # escaped.
        'filter-make_list01': ("{% autoescape off %}{{ a|make_list }}{% endautoescape %}", {"a": mark_safe("&")}, str_prefix("[%(_)s'&']")),
        'filter-make_list02': ("{{ a|make_list }}", {"a": mark_safe("&")}, str_prefix("[%(_)s&#39;&amp;&#39;]")),
        'filter-make_list03': ('{% autoescape off %}{{ a|make_list|stringformat:"s"|safe }}{% endautoescape %}', {"a": mark_safe("&")}, str_prefix("[%(_)s'&']")),
        'filter-make_list04': ('{{ a|make_list|stringformat:"s"|safe }}', {"a": mark_safe("&")}, str_prefix("[%(_)s'&']")),

        # Running slugify on a pre-escaped string leads to odd behavior,
        # but the result is still safe.
        'filter-slugify01': ("{% autoescape off %}{{ a|slugify }} {{ b|slugify }}{% endautoescape %}", {"a": "a & b", "b": mark_safe("a &amp; b")}, "a-b a-amp-b"),
        'filter-slugify02': ("{{ a|slugify }} {{ b|slugify }}", {"a": "a & b", "b": mark_safe("a &amp; b")}, "a-b a-amp-b"),

        # Notice that escaping is applied *after* any filters, so the string
        # formatting here only needs to deal with pre-escaped characters.
        'filter-stringformat01': ('{% autoescape off %}.{{ a|stringformat:"5s" }}. .{{ b|stringformat:"5s" }}.{% endautoescape %}',
            {"a": "a<b", "b": mark_safe("a<b")}, ".  a<b. .  a<b."),
        'filter-stringformat02': ('.{{ a|stringformat:"5s" }}. .{{ b|stringformat:"5s" }}.', {"a": "a<b", "b": mark_safe("a<b")},
            ".  a&lt;b. .  a<b."),

        # Test the title filter
        'filter-title1' : ('{{ a|title }}', {'a' : 'JOE\'S CRAB SHACK'}, 'Joe&#39;s Crab Shack'),
        'filter-title2' : ('{{ a|title }}', {'a' : '555 WEST 53RD STREET'}, '555 West 53rd Street'),

        'filter-truncatewords01': ('{% autoescape off %}{{ a|truncatewords:"2" }} {{ b|truncatewords:"2"}}{% endautoescape %}',
            {"a": "alpha & bravo", "b": mark_safe("alpha &amp; bravo")}, "alpha & ... alpha &amp; ..."),
        'filter-truncatewords02': ('{{ a|truncatewords:"2" }} {{ b|truncatewords:"2"}}',
            {"a": "alpha & bravo", "b": mark_safe("alpha &amp; bravo")}, "alpha &amp; ... alpha &amp; ..."),

        'filter-truncatechars01': ('{{ a|truncatechars:5 }}', {'a': "Testing, testing"}, "Te..."),
        'filter-truncatechars02': ('{{ a|truncatechars:7 }}', {'a': "Testing"}, "Testing"),

        # The "upper" filter messes up entities (which are case-sensitive),
        # so it's not safe for non-escaping purposes.
        'filter-upper01': ('{% autoescape off %}{{ a|upper }} {{ b|upper }}{% endautoescape %}', {"a": "a & b", "b": mark_safe("a &amp; b")}, "A & B A &AMP; B"),
        'filter-upper02': ('{{ a|upper }} {{ b|upper }}', {"a": "a & b", "b": mark_safe("a &amp; b")}, "A &amp; B A &amp;AMP; B"),

        'filter-urlize01': ('{% autoescape off %}{{ a|urlize }} {{ b|urlize }}{% endautoescape %}', {"a": "http://example.com/?x=&y=", "b": mark_safe("http://example.com?x=&amp;y=")}, '<a href="http://example.com/?x=&y=" rel="nofollow">http://example.com/?x=&y=</a> <a href="http://example.com?x=&amp;y=" rel="nofollow">http://example.com?x=&amp;y=</a>'),
        'filter-urlize02': ('{{ a|urlize }} {{ b|urlize }}', {"a": "http://example.com/?x=&y=", "b": mark_safe("http://example.com?x=&amp;y=")}, '<a href="http://example.com/?x=&amp;y=" rel="nofollow">http://example.com/?x=&amp;y=</a> <a href="http://example.com?x=&amp;y=" rel="nofollow">http://example.com?x=&amp;y=</a>'),
        'filter-urlize03': ('{% autoescape off %}{{ a|urlize }}{% endautoescape %}', {"a": mark_safe("a &amp; b")}, 'a &amp; b'),
        'filter-urlize04': ('{{ a|urlize }}', {"a": mark_safe("a &amp; b")}, 'a &amp; b'),

        # This will lead to a nonsense result, but at least it won't be
        # exploitable for XSS purposes when auto-escaping is on.
        'filter-urlize05': ('{% autoescape off %}{{ a|urlize }}{% endautoescape %}', {"a": "<script>alert('foo')</script>"}, "<script>alert('foo')</script>"),
        'filter-urlize06': ('{{ a|urlize }}', {"a": "<script>alert('foo')</script>"}, '&lt;script&gt;alert(&#39;foo&#39;)&lt;/script&gt;'),

        # mailto: testing for urlize
        'filter-urlize07': ('{{ a|urlize }}', {"a": "Email me at me@example.com"}, 'Email me at <a href="mailto:me@example.com">me@example.com</a>'),
        'filter-urlize08': ('{{ a|urlize }}', {"a": "Email me at <me@example.com>"}, 'Email me at &lt;<a href="mailto:me@example.com">me@example.com</a>&gt;'),

        'filter-urlizetrunc01': ('{% autoescape off %}{{ a|urlizetrunc:"8" }} {{ b|urlizetrunc:"8" }}{% endautoescape %}', {"a": '"Unsafe" http://example.com/x=&y=', "b": mark_safe('&quot;Safe&quot; http://example.com?x=&amp;y=')}, '"Unsafe" <a href="http://example.com/x=&y=" rel="nofollow">http:...</a> &quot;Safe&quot; <a href="http://example.com?x=&amp;y=" rel="nofollow">http:...</a>'),
        'filter-urlizetrunc02': ('{{ a|urlizetrunc:"8" }} {{ b|urlizetrunc:"8" }}', {"a": '"Unsafe" http://example.com/x=&y=', "b": mark_safe('&quot;Safe&quot; http://example.com?x=&amp;y=')}, '&quot;Unsafe&quot; <a href="http://example.com/x=&amp;y=" rel="nofollow">http:...</a> &quot;Safe&quot; <a href="http://example.com?x=&amp;y=" rel="nofollow">http:...</a>'),

        'filter-wordcount01': ('{% autoescape off %}{{ a|wordcount }} {{ b|wordcount }}{% endautoescape %}', {"a": "a & b", "b": mark_safe("a &amp; b")}, "3 3"),
        'filter-wordcount02': ('{{ a|wordcount }} {{ b|wordcount }}', {"a": "a & b", "b": mark_safe("a &amp; b")}, "3 3"),

        'filter-wordwrap01': ('{% autoescape off %}{{ a|wordwrap:"3" }} {{ b|wordwrap:"3" }}{% endautoescape %}', {"a": "a & b", "b": mark_safe("a & b")}, "a &\nb a &\nb"),
        'filter-wordwrap02': ('{{ a|wordwrap:"3" }} {{ b|wordwrap:"3" }}', {"a": "a & b", "b": mark_safe("a & b")}, "a &amp;\nb a &\nb"),

        'filter-ljust01': ('{% autoescape off %}.{{ a|ljust:"5" }}. .{{ b|ljust:"5" }}.{% endautoescape %}', {"a": "a&b", "b": mark_safe("a&b")}, ".a&b  . .a&b  ."),
        'filter-ljust02': ('.{{ a|ljust:"5" }}. .{{ b|ljust:"5" }}.', {"a": "a&b", "b": mark_safe("a&b")}, ".a&amp;b  . .a&b  ."),

        'filter-rjust01': ('{% autoescape off %}.{{ a|rjust:"5" }}. .{{ b|rjust:"5" }}.{% endautoescape %}', {"a": "a&b", "b": mark_safe("a&b")}, ".  a&b. .  a&b."),
        'filter-rjust02': ('.{{ a|rjust:"5" }}. .{{ b|rjust:"5" }}.', {"a": "a&b", "b": mark_safe("a&b")}, ".  a&amp;b. .  a&b."),

        'filter-center01': ('{% autoescape off %}.{{ a|center:"5" }}. .{{ b|center:"5" }}.{% endautoescape %}', {"a": "a&b", "b": mark_safe("a&b")}, ". a&b . . a&b ."),
        'filter-center02': ('.{{ a|center:"5" }}. .{{ b|center:"5" }}.', {"a": "a&b", "b": mark_safe("a&b")}, ". a&amp;b . . a&b ."),

        'filter-cut01': ('{% autoescape off %}{{ a|cut:"x" }} {{ b|cut:"x" }}{% endautoescape %}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "&y &amp;y"),
        'filter-cut02': ('{{ a|cut:"x" }} {{ b|cut:"x" }}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "&amp;y &amp;y"),
        'filter-cut03': ('{% autoescape off %}{{ a|cut:"&" }} {{ b|cut:"&" }}{% endautoescape %}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "xy xamp;y"),
        'filter-cut04': ('{{ a|cut:"&" }} {{ b|cut:"&" }}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "xy xamp;y"),
        # Passing ';' to cut can break existing HTML entities, so those strings
        # are auto-escaped.
        'filter-cut05': ('{% autoescape off %}{{ a|cut:";" }} {{ b|cut:";" }}{% endautoescape %}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "x&y x&ampy"),
        'filter-cut06': ('{{ a|cut:";" }} {{ b|cut:";" }}', {"a": "x&y", "b": mark_safe("x&amp;y")}, "x&amp;y x&amp;ampy"),

        # The "escape" filter works the same whether autoescape is on or off,
        # but it has no effect on strings already marked as safe.
        'filter-escape01': ('{{ a|escape }} {{ b|escape }}', {"a": "x&y", "b": mark_safe("x&y")}, "x&amp;y x&y"),
        'filter-escape02': ('{% autoescape off %}{{ a|escape }} {{ b|escape }}{% endautoescape %}', {"a": "x&y", "b": mark_safe("x&y")}, "x&amp;y x&y"),

        # It is only applied once, regardless of the number of times it
        # appears in a chain.
        'filter-escape03': ('{% autoescape off %}{{ a|escape|escape }}{% endautoescape %}', {"a": "x&y"}, "x&amp;y"),
        'filter-escape04': ('{{ a|escape|escape }}', {"a": "x&y"}, "x&amp;y"),

        # Force_escape is applied immediately. It can be used to provide
        # double-escaping, for example.
        'filter-force-escape01': ('{% autoescape off %}{{ a|force_escape }}{% endautoescape %}', {"a": "x&y"}, "x&amp;y"),
        'filter-force-escape02': ('{{ a|force_escape }}', {"a": "x&y"}, "x&amp;y"),
        'filter-force-escape03': ('{% autoescape off %}{{ a|force_escape|force_escape }}{% endautoescape %}', {"a": "x&y"}, "x&amp;amp;y"),
        'filter-force-escape04': ('{{ a|force_escape|force_escape }}', {"a": "x&y"}, "x&amp;amp;y"),

        # Because the result of force_escape is "safe", an additional
        # escape filter has no effect.
        'filter-force-escape05': ('{% autoescape off %}{{ a|force_escape|escape }}{% endautoescape %}', {"a": "x&y"}, "x&amp;y"),
        'filter-force-escape06': ('{{ a|force_escape|escape }}', {"a": "x&y"}, "x&amp;y"),
        'filter-force-escape07': ('{% autoescape off %}{{ a|escape|force_escape }}{% endautoescape %}', {"a": "x&y"}, "x&amp;y"),
        'filter-force-escape08': ('{{ a|escape|force_escape }}', {"a": "x&y"}, "x&amp;y"),

        # The contents in "linebreaks" and "linebreaksbr" are escaped
        # according to the current autoescape setting.
        'filter-linebreaks01': ('{{ a|linebreaks }} {{ b|linebreaks }}', {"a": "x&\ny", "b": mark_safe("x&\ny")}, "<p>x&amp;<br />y</p> <p>x&<br />y</p>"),
        'filter-linebreaks02': ('{% autoescape off %}{{ a|linebreaks }} {{ b|linebreaks }}{% endautoescape %}', {"a": "x&\ny", "b": mark_safe("x&\ny")}, "<p>x&<br />y</p> <p>x&<br />y</p>"),

        'filter-linebreaksbr01': ('{{ a|linebreaksbr }} {{ b|linebreaksbr }}', {"a": "x&\ny", "b": mark_safe("x&\ny")}, "x&amp;<br />y x&<br />y"),
        'filter-linebreaksbr02': ('{% autoescape off %}{{ a|linebreaksbr }} {{ b|linebreaksbr }}{% endautoescape %}', {"a": "x&\ny", "b": mark_safe("x&\ny")}, "x&<br />y x&<br />y"),

        'filter-safe01': ("{{ a }} -- {{ a|safe }}", {"a": "<b>hello</b>"}, "&lt;b&gt;hello&lt;/b&gt; -- <b>hello</b>"),
        'filter-safe02': ("{% autoescape off %}{{ a }} -- {{ a|safe }}{% endautoescape %}", {"a": "<b>hello</b>"}, "<b>hello</b> -- <b>hello</b>"),

        'filter-safeseq01': ('{{ a|join:", " }} -- {{ a|safeseq|join:", " }}', {"a": ["&", "<"]}, "&amp;, &lt; -- &, <"),
        'filter-safeseq02': ('{% autoescape off %}{{ a|join:", " }} -- {{ a|safeseq|join:", " }}{% endautoescape %}', {"a": ["&", "<"]}, "&, < -- &, <"),

        'filter-removetags01': ('{{ a|removetags:"a b" }} {{ b|removetags:"a b" }}', {"a": "<a>x</a> <p><b>y</b></p>", "b": mark_safe("<a>x</a> <p><b>y</b></p>")}, "x &lt;p&gt;y&lt;/p&gt; x <p>y</p>"),
        'filter-removetags02': ('{% autoescape off %}{{ a|removetags:"a b" }} {{ b|removetags:"a b" }}{% endautoescape %}', {"a": "<a>x</a> <p><b>y</b></p>", "b": mark_safe("<a>x</a> <p><b>y</b></p>")}, "x <p>y</p> x <p>y</p>"),

        'filter-striptags01': ('{{ a|striptags }} {{ b|striptags }}', {"a": "<a>x</a> <p><b>y</b></p>", "b": mark_safe("<a>x</a> <p><b>y</b></p>")}, "x y x y"),
        'filter-striptags02': ('{% autoescape off %}{{ a|striptags }} {{ b|striptags }}{% endautoescape %}', {"a": "<a>x</a> <p><b>y</b></p>", "b": mark_safe("<a>x</a> <p><b>y</b></p>")}, "x y x y"),

        'filter-first01': ('{{ a|first }} {{ b|first }}', {"a": ["a&b", "x"], "b": [mark_safe("a&b"), "x"]}, "a&amp;b a&b"),
        'filter-first02': ('{% autoescape off %}{{ a|first }} {{ b|first }}{% endautoescape %}', {"a": ["a&b", "x"], "b": [mark_safe("a&b"), "x"]}, "a&b a&b"),

        'filter-last01': ('{{ a|last }} {{ b|last }}', {"a": ["x", "a&b"], "b": ["x", mark_safe("a&b")]}, "a&amp;b a&b"),
        'filter-last02': ('{% autoescape off %}{{ a|last }} {{ b|last }}{% endautoescape %}', {"a": ["x", "a&b"], "b": ["x", mark_safe("a&b")]}, "a&b a&b"),

        'filter-random01': ('{{ a|random }} {{ b|random }}', {"a": ["a&b", "a&b"], "b": [mark_safe("a&b"), mark_safe("a&b")]}, "a&amp;b a&b"),
        'filter-random02': ('{% autoescape off %}{{ a|random }} {{ b|random }}{% endautoescape %}', {"a": ["a&b", "a&b"], "b": [mark_safe("a&b"), mark_safe("a&b")]}, "a&b a&b"),

        'filter-slice01': ('{{ a|slice:"1:3" }} {{ b|slice:"1:3" }}', {"a": "a&b", "b": mark_safe("a&b")}, "&amp;b &b"),
        'filter-slice02': ('{% autoescape off %}{{ a|slice:"1:3" }} {{ b|slice:"1:3" }}{% endautoescape %}', {"a": "a&b", "b": mark_safe("a&b")}, "&b &b"),

        'filter-unordered_list01': ('{{ a|unordered_list }}', {"a": ["x>", [["<y", []]]]}, "\t<li>x&gt;\n\t<ul>\n\t\t<li>&lt;y</li>\n\t</ul>\n\t</li>"),
        'filter-unordered_list02': ('{% autoescape off %}{{ a|unordered_list }}{% endautoescape %}', {"a": ["x>", [["<y", []]]]}, "\t<li>x>\n\t<ul>\n\t\t<li><y</li>\n\t</ul>\n\t</li>"),
        'filter-unordered_list03': ('{{ a|unordered_list }}', {"a": ["x>", [[mark_safe("<y"), []]]]}, "\t<li>x&gt;\n\t<ul>\n\t\t<li><y</li>\n\t</ul>\n\t</li>"),
        'filter-unordered_list04': ('{% autoescape off %}{{ a|unordered_list }}{% endautoescape %}', {"a": ["x>", [[mark_safe("<y"), []]]]}, "\t<li>x>\n\t<ul>\n\t\t<li><y</li>\n\t</ul>\n\t</li>"),
        'filter-unordered_list05': ('{% autoescape off %}{{ a|unordered_list }}{% endautoescape %}', {"a": ["x>", [["<y", []]]]}, "\t<li>x>\n\t<ul>\n\t\t<li><y</li>\n\t</ul>\n\t</li>"),

        # Literal string arguments to the default filter are always treated as
        # safe strings, regardless of the auto-escaping state.
        #
        # Note: we have to use {"a": ""} here, otherwise the invalid template
        # variable string interferes with the test result.
        'filter-default01': ('{{ a|default:"x<" }}', {"a": ""}, "x<"),
        'filter-default02': ('{% autoescape off %}{{ a|default:"x<" }}{% endautoescape %}', {"a": ""}, "x<"),
        'filter-default03': ('{{ a|default:"x<" }}', {"a": mark_safe("x>")}, "x>"),
        'filter-default04': ('{% autoescape off %}{{ a|default:"x<" }}{% endautoescape %}', {"a": mark_safe("x>")}, "x>"),

        'filter-default_if_none01': ('{{ a|default:"x<" }}', {"a": None}, "x<"),
        'filter-default_if_none02': ('{% autoescape off %}{{ a|default:"x<" }}{% endautoescape %}', {"a": None}, "x<"),

        'filter-phone2numeric01': ('{{ a|phone2numeric }} {{ b|phone2numeric }}', {"a": "<1-800-call-me>", "b": mark_safe("<1-800-call-me>") }, "&lt;1-800-2255-63&gt; <1-800-2255-63>"),
        'filter-phone2numeric02': ('{% autoescape off %}{{ a|phone2numeric }} {{ b|phone2numeric }}{% endautoescape %}', {"a": "<1-800-call-me>", "b": mark_safe("<1-800-call-me>") }, "<1-800-2255-63> <1-800-2255-63>"),
        'filter-phone2numeric03': ('{{ a|phone2numeric }}', {"a": "How razorback-jumping frogs can level six piqued gymnasts!"}, "469 729672225-5867464 37647 226 53835 749 747833 49662787!"),

        # Ensure iriencode keeps safe strings:
        'filter-iriencode01': ('{{ url|iriencode }}', {'url': '?test=1&me=2'}, '?test=1&amp;me=2'),
        'filter-iriencode02': ('{% autoescape off %}{{ url|iriencode }}{% endautoescape %}', {'url': '?test=1&me=2'}, '?test=1&me=2'),
        'filter-iriencode03': ('{{ url|iriencode }}', {'url': mark_safe('?test=1&me=2')}, '?test=1&me=2'),
        'filter-iriencode04': ('{% autoescape off %}{{ url|iriencode }}{% endautoescape %}', {'url': mark_safe('?test=1&me=2')}, '?test=1&me=2'),

        # urlencode
        'filter-urlencode01': ('{{ url|urlencode }}', {'url': '/test&"/me?/'}, '/test%26%22/me%3F/'),
        'filter-urlencode02': ('/test/{{ urlbit|urlencode:"" }}/', {'urlbit': 'escape/slash'}, '/test/escape%2Fslash/'),

        # Chaining a bunch of safeness-preserving filters should not alter
        # the safe status either way.
        'chaining01': ('{{ a|capfirst|center:"7" }}.{{ b|capfirst|center:"7" }}', {"a": "a < b", "b": mark_safe("a < b")}, " A &lt; b . A < b "),
        'chaining02': ('{% autoescape off %}{{ a|capfirst|center:"7" }}.{{ b|capfirst|center:"7" }}{% endautoescape %}', {"a": "a < b", "b": mark_safe("a < b")}, " A < b . A < b "),

        # Using a filter that forces a string back to unsafe:
        'chaining03': ('{{ a|cut:"b"|capfirst }}.{{ b|cut:"b"|capfirst }}', {"a": "a < b", "b": mark_safe("a < b")}, "A &lt; .A < "),
        'chaining04': ('{% autoescape off %}{{ a|cut:"b"|capfirst }}.{{ b|cut:"b"|capfirst }}{% endautoescape %}', {"a": "a < b", "b": mark_safe("a < b")}, "A < .A < "),

        # Using a filter that forces safeness does not lead to double-escaping
        'chaining05': ('{{ a|escape|capfirst }}', {"a": "a < b"}, "A &lt; b"),
        'chaining06': ('{% autoescape off %}{{ a|escape|capfirst }}{% endautoescape %}', {"a": "a < b"}, "A &lt; b"),

        # Force to safe, then back (also showing why using force_escape too
        # early in a chain can lead to unexpected results).
        'chaining07': ('{{ a|force_escape|cut:";" }}', {"a": "a < b"}, "a &amp;lt b"),
        'chaining08': ('{% autoescape off %}{{ a|force_escape|cut:";" }}{% endautoescape %}', {"a": "a < b"}, "a &lt b"),
        'chaining09': ('{{ a|cut:";"|force_escape }}', {"a": "a < b"}, "a &lt; b"),
        'chaining10': ('{% autoescape off %}{{ a|cut:";"|force_escape }}{% endautoescape %}', {"a": "a < b"}, "a &lt; b"),
        'chaining11': ('{{ a|cut:"b"|safe }}', {"a": "a < b"}, "a < "),
        'chaining12': ('{% autoescape off %}{{ a|cut:"b"|safe }}{% endautoescape %}', {"a": "a < b"}, "a < "),
        'chaining13': ('{{ a|safe|force_escape }}', {"a": "a < b"}, "a &lt; b"),
        'chaining14': ('{% autoescape off %}{{ a|safe|force_escape }}{% endautoescape %}', {"a": "a < b"}, "a &lt; b"),

        # Filters decorated with stringfilter still respect is_safe.
        'autoescape-stringfilter01': (r'{{ unsafe|capfirst }}', {'unsafe': UnsafeClass()}, 'You &amp; me'),
        'autoescape-stringfilter02': (r'{% autoescape off %}{{ unsafe|capfirst }}{% endautoescape %}', {'unsafe': UnsafeClass()}, 'You & me'),
        'autoescape-stringfilter03': (r'{{ safe|capfirst }}', {'safe': SafeClass()}, 'You &gt; me'),
        'autoescape-stringfilter04': (r'{% autoescape off %}{{ safe|capfirst }}{% endautoescape %}', {'safe': SafeClass()}, 'You &gt; me'),

        'escapejs01': (r'{{ a|escapejs }}', {'a': 'testing\r\njavascript \'string" <b>escaping</b>'}, 'testing\\u000D\\u000Ajavascript \\u0027string\\u0022 \\u003Cb\\u003Eescaping\\u003C/b\\u003E'),
        'escapejs02': (r'{% autoescape off %}{{ a|escapejs }}{% endautoescape %}', {'a': 'testing\r\njavascript \'string" <b>escaping</b>'}, 'testing\\u000D\\u000Ajavascript \\u0027string\\u0022 \\u003Cb\\u003Eescaping\\u003C/b\\u003E'),


        # length filter.
        'length01': ('{{ list|length }}', {'list': ['4', None, True, {}]}, '4'),
        'length02': ('{{ list|length }}', {'list': []}, '0'),
        'length03': ('{{ string|length }}', {'string': ''}, '0'),
        'length04': ('{{ string|length }}', {'string': 'django'}, '6'),
        # Invalid uses that should fail silently.
        'length05': ('{{ int|length }}', {'int': 7}, ''),
        'length06': ('{{ None|length }}', {'None': None}, ''),

        # length_is filter.
        'length_is01': ('{% if some_list|length_is:"4" %}Four{% endif %}', {'some_list': ['4', None, True, {}]}, 'Four'),
        'length_is02': ('{% if some_list|length_is:"4" %}Four{% else %}Not Four{% endif %}', {'some_list': ['4', None, True, {}, 17]}, 'Not Four'),
        'length_is03': ('{% if mystring|length_is:"4" %}Four{% endif %}', {'mystring': 'word'}, 'Four'),
        'length_is04': ('{% if mystring|length_is:"4" %}Four{% else %}Not Four{% endif %}', {'mystring': 'Python'}, 'Not Four'),
        'length_is05': ('{% if mystring|length_is:"4" %}Four{% else %}Not Four{% endif %}', {'mystring': ''}, 'Not Four'),
        'length_is06': ('{% with var|length as my_length %}{{ my_length }}{% endwith %}', {'var': 'django'}, '6'),
        # Boolean return value from length_is should not be coerced to a string
        'length_is07': (r'{% if "X"|length_is:0 %}Length is 0{% else %}Length not 0{% endif %}', {}, 'Length not 0'),
        'length_is08': (r'{% if "X"|length_is:1 %}Length is 1{% else %}Length not 1{% endif %}', {}, 'Length is 1'),
        # Invalid uses that should fail silently.
        'length_is09': ('{{ var|length_is:"fish" }}', {'var': 'django'}, ''),
        'length_is10': ('{{ int|length_is:"1" }}', {'int': 7}, ''),
        'length_is11': ('{{ none|length_is:"1" }}', {'none': None}, ''),

        'join01': (r'{{ a|join:", " }}', {'a': ['alpha', 'beta & me']}, 'alpha, beta &amp; me'),
        'join02': (r'{% autoescape off %}{{ a|join:", " }}{% endautoescape %}', {'a': ['alpha', 'beta & me']}, 'alpha, beta & me'),
        'join03': (r'{{ a|join:" &amp; " }}', {'a': ['alpha', 'beta & me']}, 'alpha &amp; beta &amp; me'),
        'join04': (r'{% autoescape off %}{{ a|join:" &amp; " }}{% endautoescape %}', {'a': ['alpha', 'beta & me']}, 'alpha &amp; beta & me'),

        # Test that joining with unsafe joiners don't result in unsafe strings (#11377)
        'join05': (r'{{ a|join:var }}', {'a': ['alpha', 'beta & me'], 'var': ' & '}, 'alpha &amp; beta &amp; me'),
        'join06': (r'{{ a|join:var }}', {'a': ['alpha', 'beta & me'], 'var': mark_safe(' & ')}, 'alpha & beta &amp; me'),
        'join07': (r'{{ a|join:var|lower }}', {'a': ['Alpha', 'Beta & me'], 'var': ' & ' }, 'alpha &amp; beta &amp; me'),
        'join08': (r'{{ a|join:var|lower }}', {'a': ['Alpha', 'Beta & me'], 'var': mark_safe(' & ')}, 'alpha & beta &amp; me'),

        'date01': (r'{{ d|date:"m" }}', {'d': datetime(2008, 1, 1)}, '01'),
        'date02': (r'{{ d|date }}', {'d': datetime(2008, 1, 1)}, 'Jan. 1, 2008'),
        #Ticket 9520: Make sure |date doesn't blow up on non-dates
        'date03': (r'{{ d|date:"m" }}', {'d': 'fail_string'}, ''),
        # ISO date formats
        'date04': (r'{{ d|date:"o" }}', {'d': datetime(2008, 12, 29)}, '2009'),
        'date05': (r'{{ d|date:"o" }}', {'d': datetime(2010, 1, 3)}, '2009'),
        # Timezone name
        'date06': (r'{{ d|date:"e" }}', {'d': datetime(2009, 3, 12, tzinfo=FixedOffset(30))}, '+0030'),
        'date07': (r'{{ d|date:"e" }}', {'d': datetime(2009, 3, 12)}, ''),
        # Ticket 19370: Make sure |date doesn't blow up on a midnight time object
        'date08': (r'{{ t|date:"H:i" }}', {'t': time(0, 1)}, '00:01'),
        'date09': (r'{{ t|date:"H:i" }}', {'t': time(0, 0)}, '00:00'),

         # Tests for #11687 and #16676
         'add01': (r'{{ i|add:"5" }}', {'i': 2000}, '2005'),
         'add02': (r'{{ i|add:"napis" }}', {'i': 2000}, ''),
         'add03': (r'{{ i|add:16 }}', {'i': 'not_an_int'}, ''),
         'add04': (r'{{ i|add:"16" }}', {'i': 'not_an_int'}, 'not_an_int16'),
         'add05': (r'{{ l1|add:l2 }}', {'l1': [1, 2], 'l2': [3, 4]}, '[1, 2, 3, 4]'),
         'add06': (r'{{ t1|add:t2 }}', {'t1': (3, 4), 't2': (1, 2)}, '(3, 4, 1, 2)'),
         'add07': (r'{{ d|add:t }}', {'d': date(2000, 1, 1), 't': timedelta(10)}, 'Jan. 11, 2000'),
    }