django/tests/regressiontests/templates/tests.py

# -*- coding: utf-8 -*-
from django.conf import settings

if __name__ == '__main__':
    # When running this file in isolation, we need to set up the configuration
    # before importing 'template'.
    settings.configure()

from django import template
from django.template import loader
from django.utils.translation import activate, deactivate, install
from django.utils.tzinfo import LocalTimezone
from datetime import datetime, timedelta
import unittest

#################################
# Custom template tag for tests #
#################################

register = template.Library()

class EchoNode(template.Node):
    def __init__(self, contents):
        self.contents = contents

    def render(self, context):
        return " ".join(self.contents)

def do_echo(parser, token):
    return EchoNode(token.contents.split()[1:])

register.tag("echo", do_echo)

template.libraries['django.templatetags.testtags'] = register

#####################################
# Helper objects for template tests #
#####################################

class SomeException(Exception):
    silent_variable_failure = True

class SomeOtherException(Exception):
    pass

class SomeClass:
    def __init__(self):
        self.otherclass = OtherClass()

    def method(self):
        return "SomeClass.method"

    def method2(self, o):
        return o

    def method3(self):
        raise SomeException

    def method4(self):
        raise SomeOtherException

class OtherClass:
    def method(self):
        return "OtherClass.method"

class UnicodeInStrClass:
    "Class whose __str__ returns a Unicode object."
    def __str__(self):
        return u'ŠĐĆŽćžšđ'

class Templates(unittest.TestCase):
    def test_templates(self):
        # NOW and NOW_tz are used by timesince tag tests.
        NOW = datetime.now()
        NOW_tz = datetime.now(LocalTimezone(datetime.now()))

        # SYNTAX --
        # 'template_name': ('template contents', 'context dict', 'expected string output' or Exception class)
        TEMPLATE_TESTS = {

            ### BASIC SYNTAX ##########################################################

            # Plain text should go through the template parser untouched
            'basic-syntax01': ("something cool", {}, "something cool"),

            # Variables should be replaced with their value in the current context
            'basic-syntax02': ("{{ headline }}", {'headline':'Success'}, "Success"),

            # More than one replacement variable is allowed in a template
            'basic-syntax03': ("{{ first }} --- {{ second }}", {"first" : 1, "second" : 2}, "1 --- 2"),

            # Fail silently when a variable is not found in the current context
            'basic-syntax04': ("as{{ missing }}df", {}, ("asdf","asINVALIDdf")),

            # A variable may not contain more than one word
            'basic-syntax06': ("{{ multi word variable }}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError for empty variable tags
            'basic-syntax07': ("{{ }}",        {}, template.TemplateSyntaxError),
            'basic-syntax08': ("{{        }}", {}, template.TemplateSyntaxError),

            # Attribute syntax allows a template to call an object's attribute
            'basic-syntax09': ("{{ var.method }}", {"var": SomeClass()}, "SomeClass.method"),

            # Multiple levels of attribute access are allowed
            'basic-syntax10': ("{{ var.otherclass.method }}", {"var": SomeClass()}, "OtherClass.method"),

            # Fail silently when a variable's attribute isn't found
            'basic-syntax11': ("{{ var.blech }}", {"var": SomeClass()}, ("","INVALID")),

            # Raise TemplateSyntaxError when trying to access a variable beginning with an underscore
            'basic-syntax12': ("{{ var.__dict__ }}", {"var": SomeClass()}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError when trying to access a variable containing an illegal character
            'basic-syntax13': ("{{ va>r }}", {}, template.TemplateSyntaxError),
            'basic-syntax14': ("{{ (var.r) }}", {}, template.TemplateSyntaxError),
            'basic-syntax15': ("{{ sp%am }}", {}, template.TemplateSyntaxError),
            'basic-syntax16': ("{{ eggs! }}", {}, template.TemplateSyntaxError),
            'basic-syntax17': ("{{ moo? }}", {}, template.TemplateSyntaxError),

            # Attribute syntax allows a template to call a dictionary key's value
            'basic-syntax18': ("{{ foo.bar }}", {"foo" : {"bar" : "baz"}}, "baz"),

            # Fail silently when a variable's dictionary key isn't found
            'basic-syntax19': ("{{ foo.spam }}", {"foo" : {"bar" : "baz"}}, ("","INVALID")),

            # Fail silently when accessing a non-simple method
            'basic-syntax20': ("{{ var.method2 }}", {"var": SomeClass()}, ("","INVALID")),

            # List-index syntax allows a template to access a certain item of a subscriptable object.
            'list-index01': ("{{ var.1 }}", {"var": ["first item", "second item"]}, "second item"),

            # Fail silently when the list index is out of range.
            'list-index02': ("{{ var.5 }}", {"var": ["first item", "second item"]}, ("", "INVALID")),

            # Fail silently when the variable is not a subscriptable object.
            'list-index03': ("{{ var.1 }}", {"var": None}, ("", "INVALID")),

            # Fail silently when variable is a dict without the specified key.
            'list-index04': ("{{ var.1 }}", {"var": {}}, ("", "INVALID")),

            # Dictionary lookup wins out when dict's key is a string.
            'list-index05': ("{{ var.1 }}", {"var": {'1': "hello"}}, "hello"),

            # But list-index lookup wins out when dict's key is an int, which
            # behind the scenes is really a dictionary lookup (for a dict)
            # after converting the key to an int.
            'list-index06': ("{{ var.1 }}", {"var": {1: "hello"}}, "hello"),

            # Dictionary lookup wins out when there is a string and int version of the key.
            'list-index07': ("{{ var.1 }}", {"var": {'1': "hello", 1: "world"}}, "hello"),
            
            # Basic filter usage
            'basic-syntax21': ("{{ var|upper }}", {"var": "Django is the greatest!"}, "DJANGO IS THE GREATEST!"),

            # Chained filters
            'basic-syntax22': ("{{ var|upper|lower }}", {"var": "Django is the greatest!"}, "django is the greatest!"),

            # Raise TemplateSyntaxError for space between a variable and filter pipe
            'basic-syntax23': ("{{ var |upper }}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError for space after a filter pipe
            'basic-syntax24': ("{{ var| upper }}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError for a nonexistent filter
            'basic-syntax25': ("{{ var|does_not_exist }}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError when trying to access a filter containing an illegal character
            'basic-syntax26': ("{{ var|fil(ter) }}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError for invalid block tags
            'basic-syntax27': ("{% nothing_to_see_here %}", {}, template.TemplateSyntaxError),

            # Raise TemplateSyntaxError for empty block tags
            'basic-syntax28': ("{% %}", {}, template.TemplateSyntaxError),

            # Chained filters, with an argument to the first one
            'basic-syntax29': ('{{ var|removetags:"b i"|upper|lower }}', {"var": "<b><i>Yes</i></b>"}, "yes"),

            # Escaped string as argument
            'basic-syntax30': (r'{{ var|default_if_none:" endquote\" hah" }}', {"var": None}, ' endquote" hah'),

            # Variable as argument
            'basic-syntax31': (r'{{ var|default_if_none:var2 }}', {"var": None, "var2": "happy"}, 'happy'),

            # Default argument testing
            'basic-syntax32': (r'{{ var|yesno:"yup,nup,mup" }} {{ var|yesno }}', {"var": True}, 'yup yes'),

            # Fail silently for methods that raise an exception with a "silent_variable_failure" attribute
            'basic-syntax33': (r'1{{ var.method3 }}2', {"var": SomeClass()}, ("12", "1INVALID2")),

            # In methods that raise an exception without a "silent_variable_attribute" set to True,
            # the exception propagates
            'basic-syntax34': (r'1{{ var.method4 }}2', {"var": SomeClass()}, SomeOtherException),

            # Escaped backslash in argument
            'basic-syntax35': (r'{{ var|default_if_none:"foo\bar" }}', {"var": None}, r'foo\bar'),

            # Escaped backslash using known escape char
            'basic-syntax35': (r'{{ var|default_if_none:"foo\now" }}', {"var": None}, r'foo\now'),

            # Empty strings can be passed as arguments to filters
            'basic-syntax36': (r'{{ var|join:"" }}', {'var': ['a', 'b', 'c']}, 'abc'),

            # If a variable has a __str__() that returns a Unicode object, the value
            # will be converted to a bytestring.
            'basic-syntax37': (r'{{ var }}', {'var': UnicodeInStrClass()}, '\xc5\xa0\xc4\x90\xc4\x86\xc5\xbd\xc4\x87\xc5\xbe\xc5\xa1\xc4\x91'),

            ### COMMENT SYNTAX ########################################################
            'comment-syntax01': ("{# this is hidden #}hello", {}, "hello"),
            'comment-syntax02': ("{# this is hidden #}hello{# foo #}", {}, "hello"),

            # Comments can contain invalid stuff.
            'comment-syntax03': ("foo{#  {% if %}  #}", {}, "foo"),
            'comment-syntax04': ("foo{#  {% endblock %}  #}", {}, "foo"),
            'comment-syntax05': ("foo{#  {% somerandomtag %}  #}", {}, "foo"),
            'comment-syntax06': ("foo{# {% #}", {}, "foo"),
            'comment-syntax07': ("foo{# %} #}", {}, "foo"),
            'comment-syntax08': ("foo{# %} #}bar", {}, "foobar"),
            'comment-syntax09': ("foo{# {{ #}", {}, "foo"),
            'comment-syntax10': ("foo{# }} #}", {}, "foo"),
            'comment-syntax11': ("foo{# { #}", {}, "foo"),
            'comment-syntax12': ("foo{# } #}", {}, "foo"),

            ### COMMENT TAG ###########################################################
            'comment-tag01': ("{% comment %}this is hidden{% endcomment %}hello", {}, "hello"),
            'comment-tag02': ("{% comment %}this is hidden{% endcomment %}hello{% comment %}foo{% endcomment %}", {}, "hello"),

            # Comment tag can contain invalid stuff.
            'comment-tag03': ("foo{% comment %} {% if %} {% endcomment %}", {}, "foo"),
            'comment-tag04': ("foo{% comment %} {% endblock %} {% endcomment %}", {}, "foo"),
            'comment-tag05': ("foo{% comment %} {% somerandomtag %} {% endcomment %}", {}, "foo"),

            ### CYCLE TAG #############################################################
            'cycle01': ('{% cycle a %}', {}, template.TemplateSyntaxError),
            'cycle02': ('{% cycle a,b,c as abc %}{% cycle abc %}', {}, 'ab'),
            'cycle03': ('{% cycle a,b,c as abc %}{% cycle abc %}{% cycle abc %}', {}, 'abc'),
            'cycle04': ('{% cycle a,b,c as abc %}{% cycle abc %}{% cycle abc %}{% cycle abc %}', {}, 'abca'),
            'cycle05': ('{% cycle %}', {}, template.TemplateSyntaxError),
            'cycle06': ('{% cycle a %}', {}, template.TemplateSyntaxError),
            'cycle07': ('{% cycle a,b,c as foo %}{% cycle bar %}', {}, template.TemplateSyntaxError),
            'cycle08': ('{% cycle a,b,c as foo %}{% cycle foo %}{{ foo }}{{ foo }}{% cycle foo %}{{ foo }}', {}, 'abbbcc'),

            ### EXCEPTIONS ############################################################

            # Raise exception for invalid template name
            'exception01': ("{% extends 'nonexistent' %}", {}, template.TemplateSyntaxError),

            # Raise exception for invalid template name (in variable)
            'exception02': ("{% extends nonexistent %}", {}, template.TemplateSyntaxError),

            # Raise exception for extra {% extends %} tags
            'exception03': ("{% extends 'inheritance01' %}{% block first %}2{% endblock %}{% extends 'inheritance16' %}", {}, template.TemplateSyntaxError),

            # Raise exception for custom tags used in child with {% load %} tag in parent, not in child
            'exception04': ("{% extends 'inheritance17' %}{% block first %}{% echo 400 %}5678{% endblock %}", {}, template.TemplateSyntaxError),

            ### FILTER TAG ############################################################
            'filter01': ('{% filter upper %}{% endfilter %}', {}, ''),
            'filter02': ('{% filter upper %}django{% endfilter %}', {}, 'DJANGO'),
            'filter03': ('{% filter upper|lower %}django{% endfilter %}', {}, 'django'),

            ### FIRSTOF TAG ###########################################################
            'firstof01': ('{% firstof a b c %}', {'a':0,'b':0,'c':0}, ''),
            'firstof02': ('{% firstof a b c %}', {'a':1,'b':0,'c':0}, '1'),
            'firstof03': ('{% firstof a b c %}', {'a':0,'b':2,'c':0}, '2'),
            'firstof04': ('{% firstof a b c %}', {'a':0,'b':0,'c':3}, '3'),
            'firstof05': ('{% firstof a b c %}', {'a':1,'b':2,'c':3}, '1'),
            'firstof06': ('{% firstof %}', {}, template.TemplateSyntaxError),

            ### FOR TAG ###############################################################
            'for-tag01': ("{% for val in values %}{{ val }}{% endfor %}", {"values": [1, 2, 3]}, "123"),
            'for-tag02': ("{% for val in values reversed %}{{ val }}{% endfor %}", {"values": [1, 2, 3]}, "321"),
            'for-tag-vars01': ("{% for val in values %}{{ forloop.counter }}{% endfor %}", {"values": [6, 6, 6]}, "123"),
            'for-tag-vars02': ("{% for val in values %}{{ forloop.counter0 }}{% endfor %}", {"values": [6, 6, 6]}, "012"),
            'for-tag-vars03': ("{% for val in values %}{{ forloop.revcounter }}{% endfor %}", {"values": [6, 6, 6]}, "321"),
            'for-tag-vars04': ("{% for val in values %}{{ forloop.revcounter0 }}{% endfor %}", {"values": [6, 6, 6]}, "210"),

            ### IF TAG ################################################################
            'if-tag01': ("{% if foo %}yes{% else %}no{% endif %}", {"foo": True}, "yes"),
            'if-tag02': ("{% if foo %}yes{% else %}no{% endif %}", {"foo": False}, "no"),
            'if-tag03': ("{% if foo %}yes{% else %}no{% endif %}", {}, "no"),

            # AND
            'if-tag-and01': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'yes'),
            'if-tag-and02': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'no'),
            'if-tag-and03': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'no'),
            'if-tag-and04': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'no'),
            'if-tag-and05': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': False}, 'no'),
            'if-tag-and06': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'bar': False}, 'no'),
            'if-tag-and07': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'foo': True}, 'no'),
            'if-tag-and08': ("{% if foo and bar %}yes{% else %}no{% endif %}", {'bar': True}, 'no'),

            # OR
            'if-tag-or01': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'yes'),
            'if-tag-or02': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'yes'),
            'if-tag-or03': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'yes'),
            'if-tag-or04': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'no'),
            'if-tag-or05': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': False}, 'no'),
            'if-tag-or06': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'bar': False}, 'no'),
            'if-tag-or07': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'foo': True}, 'yes'),
            'if-tag-or08': ("{% if foo or bar %}yes{% else %}no{% endif %}", {'bar': True}, 'yes'),

            # TODO: multiple ORs

            # NOT
            'if-tag-not01': ("{% if not foo %}no{% else %}yes{% endif %}", {'foo': True}, 'yes'),
            'if-tag-not02': ("{% if not %}yes{% else %}no{% endif %}", {'foo': True}, 'no'),
            'if-tag-not03': ("{% if not %}yes{% else %}no{% endif %}", {'not': True}, 'yes'),
            'if-tag-not04': ("{% if not not %}no{% else %}yes{% endif %}", {'not': True}, 'yes'),
            'if-tag-not05': ("{% if not not %}no{% else %}yes{% endif %}", {}, 'no'),

            'if-tag-not06': ("{% if foo and not bar %}yes{% else %}no{% endif %}", {}, 'no'),
            'if-tag-not07': ("{% if foo and not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'no'),
            'if-tag-not08': ("{% if foo and not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'yes'),
            'if-tag-not09': ("{% if foo and not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'no'),
            'if-tag-not10': ("{% if foo and not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'no'),

            'if-tag-not11': ("{% if not foo and bar %}yes{% else %}no{% endif %}", {}, 'no'),
            'if-tag-not12': ("{% if not foo and bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'no'),
            'if-tag-not13': ("{% if not foo and bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'no'),
            'if-tag-not14': ("{% if not foo and bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'yes'),
            'if-tag-not15': ("{% if not foo and bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'no'),

            'if-tag-not16': ("{% if foo or not bar %}yes{% else %}no{% endif %}", {}, 'yes'),
            'if-tag-not17': ("{% if foo or not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'yes'),
            'if-tag-not18': ("{% if foo or not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'yes'),
            'if-tag-not19': ("{% if foo or not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'no'),
            'if-tag-not20': ("{% if foo or not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'yes'),

            'if-tag-not21': ("{% if not foo or bar %}yes{% else %}no{% endif %}", {}, 'yes'),
            'if-tag-not22': ("{% if not foo or bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'yes'),
            'if-tag-not23': ("{% if not foo or bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'no'),
            'if-tag-not24': ("{% if not foo or bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'yes'),
            'if-tag-not25': ("{% if not foo or bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'yes'),

            'if-tag-not26': ("{% if not foo and not bar %}yes{% else %}no{% endif %}", {}, 'yes'),
            'if-tag-not27': ("{% if not foo and not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'no'),
            'if-tag-not28': ("{% if not foo and not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'no'),
            'if-tag-not29': ("{% if not foo and not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'no'),
            'if-tag-not30': ("{% if not foo and not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'yes'),

            'if-tag-not31': ("{% if not foo or not bar %}yes{% else %}no{% endif %}", {}, 'yes'),
            'if-tag-not32': ("{% if not foo or not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': True}, 'no'),
            'if-tag-not33': ("{% if not foo or not bar %}yes{% else %}no{% endif %}", {'foo': True, 'bar': False}, 'yes'),
            'if-tag-not34': ("{% if not foo or not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': True}, 'yes'),
            'if-tag-not35': ("{% if not foo or not bar %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, 'yes'),

            # AND and OR raises a TemplateSyntaxError
            'if-tag-error01': ("{% if foo or bar and baz %}yes{% else %}no{% endif %}", {'foo': False, 'bar': False}, template.TemplateSyntaxError),
            'if-tag-error02': ("{% if foo and %}yes{% else %}no{% endif %}", {'foo': True}, template.TemplateSyntaxError),
            'if-tag-error03': ("{% if foo or %}yes{% else %}no{% endif %}", {'foo': True}, template.TemplateSyntaxError),
            'if-tag-error04': ("{% if not foo and %}yes{% else %}no{% endif %}", {'foo': True}, template.TemplateSyntaxError),
            'if-tag-error05': ("{% if not foo or %}yes{% else %}no{% endif %}", {'foo': True}, template.TemplateSyntaxError),

            ### IFCHANGED TAG #########################################################
            'ifchanged01': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}', { 'num': (1,2,3) }, '123'),
            'ifchanged02': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}', { 'num': (1,1,3) }, '13'),
            'ifchanged03': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}', { 'num': (1,1,1) }, '1'),
            'ifchanged04': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}{% endfor %}{% endfor %}', { 'num': (1, 2, 3), 'numx': (2, 2, 2)}, '122232'),
            'ifchanged05': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}{% endfor %}{% endfor %}', { 'num': (1, 1, 1), 'numx': (1, 2, 3)}, '1123123123'),
            'ifchanged06': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}{% endfor %}{% endfor %}', { 'num': (1, 1, 1), 'numx': (2, 2, 2)}, '1222'),
            'ifchanged07': ('{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}{% for y in numy %}{% ifchanged %}{{ y }}{% endifchanged %}{% endfor %}{% endfor %}{% endfor %}', { 'num': (1, 1, 1), 'numx': (2, 2, 2), 'numy': (3, 3, 3)}, '1233323332333'),

            # Test one parameter given to ifchanged.
            'ifchanged-param01': ('{% for n in num %}{% ifchanged n %}..{% endifchanged %}{{ n }}{% endfor %}', { 'num': (1,2,3) }, '..1..2..3'),
            'ifchanged-param02': ('{% for n in num %}{% for x in numx %}{% ifchanged n %}..{% endifchanged %}{{ x }}{% endfor %}{% endfor %}', { 'num': (1,2,3), 'numx': (5,6,7) }, '..567..567..567'),

            # Test multiple parameters to ifchanged.
            'ifchanged-param03': ('{% for n in num %}{{ n }}{% for x in numx %}{% ifchanged x n %}{{ x }}{% endifchanged %}{% endfor %}{% endfor %}', { 'num': (1,1,2), 'numx': (5,6,6) }, '156156256'),

            # Test a date+hour like construct, where the hour of the last day
            # is the same but the date had changed, so print the hour anyway.
            'ifchanged-param04': ('{% for d in days %}{% ifchanged %}{{ d.day }}{% endifchanged %}{% for h in d.hours %}{% ifchanged d h %}{{ h }}{% endifchanged %}{% endfor %}{% endfor %}', {'days':[{'day':1, 'hours':[1,2,3]},{'day':2, 'hours':[3]},] }, '112323'),

            # Logically the same as above, just written with explicit
            # ifchanged for the day.
            'ifchanged-param04': ('{% for d in days %}{% ifchanged d.day %}{{ d.day }}{% endifchanged %}{% for h in d.hours %}{% ifchanged d.day h %}{{ h }}{% endifchanged %}{% endfor %}{% endfor %}', {'days':[{'day':1, 'hours':[1,2,3]},{'day':2, 'hours':[3]},] }, '112323'),

            ### IFEQUAL TAG ###########################################################
            'ifequal01': ("{% ifequal a b %}yes{% endifequal %}", {"a": 1, "b": 2}, ""),
            'ifequal02': ("{% ifequal a b %}yes{% endifequal %}", {"a": 1, "b": 1}, "yes"),
            'ifequal03': ("{% ifequal a b %}yes{% else %}no{% endifequal %}", {"a": 1, "b": 2}, "no"),
            'ifequal04': ("{% ifequal a b %}yes{% else %}no{% endifequal %}", {"a": 1, "b": 1}, "yes"),
            'ifequal05': ("{% ifequal a 'test' %}yes{% else %}no{% endifequal %}", {"a": "test"}, "yes"),
            'ifequal06': ("{% ifequal a 'test' %}yes{% else %}no{% endifequal %}", {"a": "no"}, "no"),
            'ifequal07': ('{% ifequal a "test" %}yes{% else %}no{% endifequal %}', {"a": "test"}, "yes"),
            'ifequal08': ('{% ifequal a "test" %}yes{% else %}no{% endifequal %}', {"a": "no"}, "no"),
            'ifequal09': ('{% ifequal a "test" %}yes{% else %}no{% endifequal %}', {}, "no"),
            'ifequal10': ('{% ifequal a b %}yes{% else %}no{% endifequal %}', {}, "yes"),

            # SMART SPLITTING
            'ifequal-split01': ('{% ifequal a "test man" %}yes{% else %}no{% endifequal %}', {}, "no"),
            'ifequal-split02': ('{% ifequal a "test man" %}yes{% else %}no{% endifequal %}', {'a': 'foo'}, "no"),
            'ifequal-split03': ('{% ifequal a "test man" %}yes{% else %}no{% endifequal %}', {'a': 'test man'}, "yes"),
            'ifequal-split04': ("{% ifequal a 'test man' %}yes{% else %}no{% endifequal %}", {'a': 'test man'}, "yes"),
            'ifequal-split05': ("{% ifequal a 'i \"love\" you' %}yes{% else %}no{% endifequal %}", {'a': ''}, "no"),
            'ifequal-split06': ("{% ifequal a 'i \"love\" you' %}yes{% else %}no{% endifequal %}", {'a': 'i "love" you'}, "yes"),
            'ifequal-split07': ("{% ifequal a 'i \"love\" you' %}yes{% else %}no{% endifequal %}", {'a': 'i love you'}, "no"),
            'ifequal-split08': (r"{% ifequal a 'I\'m happy' %}yes{% else %}no{% endifequal %}", {'a': "I'm happy"}, "yes"),
            'ifequal-split09': (r"{% ifequal a 'slash\man' %}yes{% else %}no{% endifequal %}", {'a': r"slash\man"}, "yes"),
            'ifequal-split10': (r"{% ifequal a 'slash\man' %}yes{% else %}no{% endifequal %}", {'a': r"slashman"}, "no"),

            # NUMERIC RESOLUTION
            'ifequal-numeric01': ('{% ifequal x 5 %}yes{% endifequal %}', {'x': '5'}, ''),
            'ifequal-numeric02': ('{% ifequal x 5 %}yes{% endifequal %}', {'x': 5}, 'yes'),
            'ifequal-numeric03': ('{% ifequal x 5.2 %}yes{% endifequal %}', {'x': 5}, ''),
            'ifequal-numeric04': ('{% ifequal x 5.2 %}yes{% endifequal %}', {'x': 5.2}, 'yes'),
            'ifequal-numeric05': ('{% ifequal x 0.2 %}yes{% endifequal %}', {'x': .2}, 'yes'),
            'ifequal-numeric06': ('{% ifequal x .2 %}yes{% endifequal %}', {'x': .2}, 'yes'),
            'ifequal-numeric07': ('{% ifequal x 2. %}yes{% endifequal %}', {'x': 2}, ''),
            'ifequal-numeric08': ('{% ifequal x "5" %}yes{% endifequal %}', {'x': 5}, ''),
            'ifequal-numeric09': ('{% ifequal x "5" %}yes{% endifequal %}', {'x': '5'}, 'yes'),
            'ifequal-numeric10': ('{% ifequal x -5 %}yes{% endifequal %}', {'x': -5}, 'yes'),
            'ifequal-numeric11': ('{% ifequal x -5.2 %}yes{% endifequal %}', {'x': -5.2}, 'yes'),
            'ifequal-numeric12': ('{% ifequal x +5 %}yes{% endifequal %}', {'x': 5}, 'yes'),

            ### IFNOTEQUAL TAG ########################################################
            'ifnotequal01': ("{% ifnotequal a b %}yes{% endifnotequal %}", {"a": 1, "b": 2}, "yes"),
            'ifnotequal02': ("{% ifnotequal a b %}yes{% endifnotequal %}", {"a": 1, "b": 1}, ""),
            'ifnotequal03': ("{% ifnotequal a b %}yes{% else %}no{% endifnotequal %}", {"a": 1, "b": 2}, "yes"),
            'ifnotequal04': ("{% ifnotequal a b %}yes{% else %}no{% endifnotequal %}", {"a": 1, "b": 1}, "no"),

            ### INCLUDE TAG ###########################################################
            'include01': ('{% include "basic-syntax01" %}', {}, "something cool"),
            'include02': ('{% include "basic-syntax02" %}', {'headline': 'Included'}, "Included"),
            'include03': ('{% include template_name %}', {'template_name': 'basic-syntax02', 'headline': 'Included'}, "Included"),
            'include04': ('a{% include "nonexistent" %}b', {}, "ab"),

            ### NAMED ENDBLOCKS #######################################################

            # Basic test
            'namedendblocks01': ("1{% block first %}_{% block second %}2{% endblock second %}_{% endblock first %}3", {}, '1_2_3'),

            # Unbalanced blocks
            'namedendblocks02': ("1{% block first %}_{% block second %}2{% endblock first %}_{% endblock second %}3", {}, template.TemplateSyntaxError),
            'namedendblocks03': ("1{% block first %}_{% block second %}2{% endblock %}_{% endblock second %}3", {}, template.TemplateSyntaxError),
            'namedendblocks04': ("1{% block first %}_{% block second %}2{% endblock second %}_{% endblock third %}3", {}, template.TemplateSyntaxError),
            'namedendblocks05': ("1{% block first %}_{% block second %}2{% endblock first %}", {}, template.TemplateSyntaxError),

            # Mixed named and unnamed endblocks
            'namedendblocks06': ("1{% block first %}_{% block second %}2{% endblock %}_{% endblock first %}3", {}, '1_2_3'),
            'namedendblocks07': ("1{% block first %}_{% block second %}2{% endblock second %}_{% endblock %}3", {}, '1_2_3'),

            ### INHERITANCE ###########################################################

            # Standard template with no inheritance
            'inheritance01': ("1{% block first %}_{% endblock %}3{% block second %}_{% endblock %}", {}, '1_3_'),

            # Standard two-level inheritance
            'inheritance02': ("{% extends 'inheritance01' %}{% block first %}2{% endblock %}{% block second %}4{% endblock %}", {}, '1234'),

            # Three-level with no redefinitions on third level
            'inheritance03': ("{% extends 'inheritance02' %}", {}, '1234'),

            # Two-level with no redefinitions on second level
            'inheritance04': ("{% extends 'inheritance01' %}", {}, '1_3_'),

            # Two-level with double quotes instead of single quotes
            'inheritance05': ('{% extends "inheritance02" %}', {}, '1234'),

            # Three-level with variable parent-template name
            'inheritance06': ("{% extends foo %}", {'foo': 'inheritance02'}, '1234'),

            # Two-level with one block defined, one block not defined
            'inheritance07': ("{% extends 'inheritance01' %}{% block second %}5{% endblock %}", {}, '1_35'),

            # Three-level with one block defined on this level, two blocks defined next level
            'inheritance08': ("{% extends 'inheritance02' %}{% block second %}5{% endblock %}", {}, '1235'),

            # Three-level with second and third levels blank
            'inheritance09': ("{% extends 'inheritance04' %}", {}, '1_3_'),

            # Three-level with space NOT in a block -- should be ignored
            'inheritance10': ("{% extends 'inheritance04' %}      ", {}, '1_3_'),

            # Three-level with both blocks defined on this level, but none on second level
            'inheritance11': ("{% extends 'inheritance04' %}{% block first %}2{% endblock %}{% block second %}4{% endblock %}", {}, '1234'),

            # Three-level with this level providing one and second level providing the other
            'inheritance12': ("{% extends 'inheritance07' %}{% block first %}2{% endblock %}", {}, '1235'),

            # Three-level with this level overriding second level
            'inheritance13': ("{% extends 'inheritance02' %}{% block first %}a{% endblock %}{% block second %}b{% endblock %}", {}, '1a3b'),

            # A block defined only in a child template shouldn't be displayed
            'inheritance14': ("{% extends 'inheritance01' %}{% block newblock %}NO DISPLAY{% endblock %}", {}, '1_3_'),

            # A block within another block
            'inheritance15': ("{% extends 'inheritance01' %}{% block first %}2{% block inner %}inner{% endblock %}{% endblock %}", {}, '12inner3_'),

            # A block within another block (level 2)
            'inheritance16': ("{% extends 'inheritance15' %}{% block inner %}out{% endblock %}", {}, '12out3_'),

            # {% load %} tag (parent -- setup for exception04)
            'inheritance17': ("{% load testtags %}{% block first %}1234{% endblock %}", {}, '1234'),

            # {% load %} tag (standard usage, without inheritance)
            'inheritance18': ("{% load testtags %}{% echo this that theother %}5678", {}, 'this that theother5678'),

            # {% load %} tag (within a child template)
            'inheritance19': ("{% extends 'inheritance01' %}{% block first %}{% load testtags %}{% echo 400 %}5678{% endblock %}", {}, '140056783_'),

            # Two-level inheritance with {{ block.super }}
            'inheritance20': ("{% extends 'inheritance01' %}{% block first %}{{ block.super }}a{% endblock %}", {}, '1_a3_'),

            # Three-level inheritance with {{ block.super }} from parent
            'inheritance21': ("{% extends 'inheritance02' %}{% block first %}{{ block.super }}a{% endblock %}", {}, '12a34'),

            # Three-level inheritance with {{ block.super }} from grandparent
            'inheritance22': ("{% extends 'inheritance04' %}{% block first %}{{ block.super }}a{% endblock %}", {}, '1_a3_'),

            # Three-level inheritance with {{ block.super }} from parent and grandparent
            'inheritance23': ("{% extends 'inheritance20' %}{% block first %}{{ block.super }}b{% endblock %}", {}, '1_ab3_'),

            # Inheritance from local context without use of template loader
            'inheritance24': ("{% extends context_template %}{% block first %}2{% endblock %}{% block second %}4{% endblock %}", {'context_template': template.Template("1{% block first %}_{% endblock %}3{% block second %}_{% endblock %}")}, '1234'),

            # Inheritance from local context with variable parent template
            'inheritance25': ("{% extends context_template.1 %}{% block first %}2{% endblock %}{% block second %}4{% endblock %}", {'context_template': [template.Template("Wrong"), template.Template("1{% block first %}_{% endblock %}3{% block second %}_{% endblock %}")]}, '1234'),

            ### I18N ##################################################################

            # {% spaceless %} tag
            'spaceless01': ("{% spaceless %} <b>    <i> text </i>    </b> {% endspaceless %}", {}, "<b> <i> text </i> </b>"),
            'spaceless02': ("{% spaceless %} <b> \n <i> text </i> \n </b> {% endspaceless %}", {}, "<b> <i> text </i> </b>"),
            'spaceless03': ("{% spaceless %}<b><i>text</i></b>{% endspaceless %}", {}, "<b><i>text</i></b>"),

            # simple translation of a string delimited by '
            'i18n01': ("{% load i18n %}{% trans 'xxxyyyxxx' %}", {}, "xxxyyyxxx"),

            # simple translation of a string delimited by "
            'i18n02': ('{% load i18n %}{% trans "xxxyyyxxx" %}', {}, "xxxyyyxxx"),

            # simple translation of a variable
            'i18n03': ('{% load i18n %}{% blocktrans %}{{ anton }}{% endblocktrans %}', {'anton': 'xxxyyyxxx'}, "xxxyyyxxx"),

            # simple translation of a variable and filter
            'i18n04': ('{% load i18n %}{% blocktrans with anton|lower as berta %}{{ berta }}{% endblocktrans %}', {'anton': 'XXXYYYXXX'}, "xxxyyyxxx"),

            # simple translation of a string with interpolation
            'i18n05': ('{% load i18n %}{% blocktrans %}xxx{{ anton }}xxx{% endblocktrans %}', {'anton': 'yyy'}, "xxxyyyxxx"),

            # simple translation of a string to german
            'i18n06': ('{% load i18n %}{% trans "Page not found" %}', {'LANGUAGE_CODE': 'de'}, "Seite nicht gefunden"),

            # translation of singular form
            'i18n07': ('{% load i18n %}{% blocktrans count number as counter %}singular{% plural %}plural{% endblocktrans %}', {'number': 1}, "singular"),

            # translation of plural form
            'i18n08': ('{% load i18n %}{% blocktrans count number as counter %}singular{% plural %}plural{% endblocktrans %}', {'number': 2}, "plural"),

            # simple non-translation (only marking) of a string to german
            'i18n09': ('{% load i18n %}{% trans "Page not found" noop %}', {'LANGUAGE_CODE': 'de'}, "Page not found"),

            # translation of a variable with a translated filter
            'i18n10': ('{{ bool|yesno:_("ja,nein") }}', {'bool': True}, 'ja'),

            # translation of a variable with a non-translated filter
            'i18n11': ('{{ bool|yesno:"ja,nein" }}', {'bool': True}, 'ja'),

            # usage of the get_available_languages tag
            'i18n12': ('{% load i18n %}{% get_available_languages as langs %}{% for lang in langs %}{% ifequal lang.0 "de" %}{{ lang.0 }}{% endifequal %}{% endfor %}', {}, 'de'),

            # translation of a constant string
            'i18n13': ('{{ _("Page not found") }}', {'LANGUAGE_CODE': 'de'}, 'Seite nicht gefunden'),

            ### HANDLING OF TEMPLATE_TAG_IF_INVALID ###################################

            'invalidstr01': ('{{ var|default:"Foo" }}', {}, ('Foo','INVALID')),
            'invalidstr02': ('{{ var|default_if_none:"Foo" }}', {}, ('','INVALID')),
            'invalidstr03': ('{% for v in var %}({{ v }}){% endfor %}', {}, ''),
            'invalidstr04': ('{% if var %}Yes{% else %}No{% endif %}', {}, 'No'),
            'invalidstr04': ('{% if var|default:"Foo" %}Yes{% else %}No{% endif %}', {}, 'Yes'),

            ### MULTILINE #############################################################

            'multiline01': ("""
                            Hello,
                            boys.
                            How
                            are
                            you
                            gentlemen.
                            """,
                            {},
                            """
                            Hello,
                            boys.
                            How
                            are
                            you
                            gentlemen.
                            """),

            ### REGROUP TAG ###########################################################
            'regroup01': ('{% regroup data by bar as grouped %}' + \
                          '{% for group in grouped %}' + \
                          '{{ group.grouper }}:' + \
                          '{% for item in group.list %}' + \
                          '{{ item.foo }}' + \
                          '{% endfor %},' + \
                          '{% endfor %}',
                          {'data': [ {'foo':'c', 'bar':1},
                                     {'foo':'d', 'bar':1},
                                     {'foo':'a', 'bar':2},
                                     {'foo':'b', 'bar':2},
                                     {'foo':'x', 'bar':3}  ]},
                          '1:cd,2:ab,3:x,'),

            # Test for silent failure when target variable isn't found
            'regroup02': ('{% regroup data by bar as grouped %}' + \
                          '{% for group in grouped %}' + \
                          '{{ group.grouper }}:' + \
                          '{% for item in group.list %}' + \
                          '{{ item.foo }}' + \
                          '{% endfor %},' + \
                          '{% endfor %}',
                          {}, ''),

            ### TEMPLATETAG TAG #######################################################
            'templatetag01': ('{% templatetag openblock %}', {}, '{%'),
            'templatetag02': ('{% templatetag closeblock %}', {}, '%}'),
            'templatetag03': ('{% templatetag openvariable %}', {}, '{{'),
            'templatetag04': ('{% templatetag closevariable %}', {}, '}}'),
            'templatetag05': ('{% templatetag %}', {}, template.TemplateSyntaxError),
            'templatetag06': ('{% templatetag foo %}', {}, template.TemplateSyntaxError),
            'templatetag07': ('{% templatetag openbrace %}', {}, '{'),
            'templatetag08': ('{% templatetag closebrace %}', {}, '}'),
            'templatetag09': ('{% templatetag openbrace %}{% templatetag openbrace %}', {}, '{{'),
            'templatetag10': ('{% templatetag closebrace %}{% templatetag closebrace %}', {}, '}}'),
            'templatetag11': ('{% templatetag opencomment %}', {}, '{#'),
            'templatetag12': ('{% templatetag closecomment %}', {}, '#}'),

            ### WIDTHRATIO TAG ########################################################
            'widthratio01': ('{% widthratio a b 0 %}', {'a':50,'b':100}, '0'),
            'widthratio02': ('{% widthratio a b 100 %}', {'a':0,'b':0}, ''),
            'widthratio03': ('{% widthratio a b 100 %}', {'a':0,'b':100}, '0'),
            'widthratio04': ('{% widthratio a b 100 %}', {'a':50,'b':100}, '50'),
            'widthratio05': ('{% widthratio a b 100 %}', {'a':100,'b':100}, '100'),

            # 62.5 should round to 63
            'widthratio06': ('{% widthratio a b 100 %}', {'a':50,'b':80}, '63'),

            # 71.4 should round to 71
            'widthratio07': ('{% widthratio a b 100 %}', {'a':50,'b':70}, '71'),

            # Raise exception if we don't have 3 args, last one an integer
            'widthratio08': ('{% widthratio %}', {}, template.TemplateSyntaxError),
            'widthratio09': ('{% widthratio a b %}', {'a':50,'b':100}, template.TemplateSyntaxError),
            'widthratio10': ('{% widthratio a b 100.0 %}', {'a':50,'b':100}, template.TemplateSyntaxError),

            ### WITH TAG ########################################################
            'with01': ('{% with dict.key as key %}{{ key }}{% endwith %}', {'dict': {'key':50}}, '50'),
            'with02': ('{{ key }}{% with dict.key as key %}{{ key }}-{{ dict.key }}-{{ key }}{% endwith %}{{ key }}', {'dict': {'key':50}}, ('50-50-50', 'INVALID50-50-50INVALID')),

            ### LOREM TAG ######################################################
            'lorem01': ('{% lorem %}', {}, 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'),
            'lorem02': ('{% lorem p %}', {}, '<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>'),
            'lorem03': ('{% lorem 6 w %}', {}, 'lorem ipsum dolor sit amet consectetur'),

            ### NOW TAG ########################################################
            # Simple case
            'now01' : ('{% now "j n Y"%}', {}, str(datetime.now().day) + ' ' + str(datetime.now().month) + ' ' + str(datetime.now().year)),

            # Check parsing of escaped and special characters
            'now02' : ('{% now "j "n" Y"%}', {}, template.TemplateSyntaxError),
        #    'now03' : ('{% now "j \"n\" Y"%}', {}, str(datetime.now().day) + '"' + str(datetime.now().month) + '"' + str(datetime.now().year)),
        #    'now04' : ('{% now "j \nn\n Y"%}', {}, str(datetime.now().day) + '\n' + str(datetime.now().month) + '\n' + str(datetime.now().year))

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

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

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

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

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

            ### URL TAG ########################################################
            # Successes
            'url01' : ('{% url regressiontests.templates.views.client client.id %}', {'client': {'id': 1}}, '/url_tag/client/1/'),
            'url02' : ('{% url regressiontests.templates.views.client_action client.id,action="update" %}', {'client': {'id': 1}}, '/url_tag/client/1/update/'),
            'url03' : ('{% url regressiontests.templates.views.index %}', {}, '/url_tag/'),

            # Failures
            'url04' : ('{% url %}', {}, template.TemplateSyntaxError),
            'url05' : ('{% url no_such_view %}', {}, ''),
            'url06' : ('{% url regressiontests.templates.views.client no_such_param="value" %}', {}, ''),
        }

        # Register our custom template loader.
        def test_template_loader(template_name, template_dirs=None):
            "A custom template loader that loads the unit-test templates."
            try:
                return (TEMPLATE_TESTS[template_name][0] , "test:%s" % template_name)
            except KeyError:
                raise template.TemplateDoesNotExist, template_name

        old_template_loaders = loader.template_source_loaders
        loader.template_source_loaders = [test_template_loader]

        failures = []
        tests = TEMPLATE_TESTS.items()
        tests.sort()

        # Turn TEMPLATE_DEBUG off, because tests assume that.
        old_td, settings.TEMPLATE_DEBUG = settings.TEMPLATE_DEBUG, False

        # Set TEMPLATE_STRING_IF_INVALID to a known string
        old_invalid = settings.TEMPLATE_STRING_IF_INVALID

        for name, vals in tests:
            install()

            if isinstance(vals[2], tuple):
                normal_string_result = vals[2][0]
                invalid_string_result = vals[2][1]
            else:
                normal_string_result = vals[2]
                invalid_string_result = vals[2]

            if 'LANGUAGE_CODE' in vals[1]:
                activate(vals[1]['LANGUAGE_CODE'])
            else:
                activate('en-us')

            for invalid_str, result in [('', normal_string_result),
                                        ('INVALID', invalid_string_result)]:
                settings.TEMPLATE_STRING_IF_INVALID = invalid_str
                try:
                    output = loader.get_template(name).render(template.Context(vals[1]))
                except Exception, e:
                    if e.__class__ != result:
                        failures.append("Template test (TEMPLATE_STRING_IF_INVALID='%s'): %s -- FAILED. Got %s, exception: %s" % (invalid_str, name, e.__class__, e))
                    continue
                if output != result:
                    failures.append("Template test (TEMPLATE_STRING_IF_INVALID='%s'): %s -- FAILED. Expected %r, got %r" % (invalid_str, name, result, output))

            if 'LANGUAGE_CODE' in vals[1]:
                deactivate()

        loader.template_source_loaders = old_template_loaders
        deactivate()
        settings.TEMPLATE_DEBUG = old_td
        settings.TEMPLATE_STRING_IF_INVALID = old_invalid

        self.assertEqual(failures, [], '\n'.join(failures))

if __name__ == "__main__":
    unittest.main()