tests.py

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 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")),

            # 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 propogates
            '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'),

            ### 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'),

            ### 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"),

            ### 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"),

            ### 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 %}', {}, '}}'),

            ### 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),

            ### 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'),
        }

        # 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()