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import os
from django.template import Context, Engine, TemplateDoesNotExist, TemplateSyntaxError
from django.test import SimpleTestCase
from .utils import ROOT, setup
RECURSIVE = os.path.join(ROOT, "recursive_templates")
class ExtendsBehaviorTests(SimpleTestCase):
def test_normal_extend(self):
engine = Engine(dirs=[os.path.join(RECURSIVE, "fs")])
template = engine.get_template("one.html")
output = template.render(Context({}))
self.assertEqual(output.strip(), "three two one")
def test_extend_recursive(self):
engine = Engine(
dirs=[
os.path.join(RECURSIVE, "fs"),
os.path.join(RECURSIVE, "fs2"),
os.path.join(RECURSIVE, "fs3"),
]
)
template = engine.get_template("recursive.html")
output = template.render(Context({}))
self.assertEqual(output.strip(), "fs3/recursive fs2/recursive fs/recursive")
def test_extend_missing(self):
engine = Engine(dirs=[os.path.join(RECURSIVE, "fs")])
template = engine.get_template("extend-missing.html")
with self.assertRaises(TemplateDoesNotExist) as e:
template.render(Context({}))
tried = e.exception.tried
self.assertEqual(len(tried), 1)
self.assertEqual(tried[0][0].template_name, "missing.html")
def test_recursive_multiple_loaders(self):
engine = Engine(
dirs=[os.path.join(RECURSIVE, "fs")],
loaders=[
(
"django.template.loaders.locmem.Loader",
{
"one.html": (
'{% extends "one.html" %}{% block content %}'
"{{ block.super }} locmem-one{% endblock %}"
),
"two.html": (
'{% extends "two.html" %}{% block content %}'
"{{ block.super }} locmem-two{% endblock %}"
),
"three.html": (
'{% extends "three.html" %}{% block content %}'
"{{ block.super }} locmem-three{% endblock %}"
),
},
),
"django.template.loaders.filesystem.Loader",
],
)
template = engine.get_template("one.html")
output = template.render(Context({}))
self.assertEqual(
output.strip(), "three locmem-three two locmem-two one locmem-one"
)
def test_extend_self_error(self):
"""
Catch if a template extends itself and no other matching
templates are found.
"""
engine = Engine(dirs=[os.path.join(RECURSIVE, "fs")])
template = engine.get_template("self.html")
with self.assertRaises(TemplateDoesNotExist) as e:
template.render(Context({}))
tried = e.exception.tried
self.assertEqual(len(tried), 1)
origin, message = tried[0]
self.assertEqual(origin.template_name, "self.html")
self.assertEqual(message, "Skipped to avoid recursion")
def test_extend_cached(self):
engine = Engine(
dirs=[
os.path.join(RECURSIVE, "fs"),
os.path.join(RECURSIVE, "fs2"),
os.path.join(RECURSIVE, "fs3"),
],
loaders=[
(
"django.template.loaders.cached.Loader",
[
"django.template.loaders.filesystem.Loader",
],
),
],
)
template = engine.get_template("recursive.html")
output = template.render(Context({}))
self.assertEqual(output.strip(), "fs3/recursive fs2/recursive fs/recursive")
cache = engine.template_loaders[0].get_template_cache
self.assertEqual(len(cache), 3)
expected_path = os.path.join("fs", "recursive.html")
self.assertTrue(cache["recursive.html"].origin.name.endswith(expected_path))
# Render another path that uses the same templates from the cache
template = engine.get_template("other-recursive.html")
output = template.render(Context({}))
self.assertEqual(output.strip(), "fs3/recursive fs2/recursive fs/recursive")
# Template objects should not be duplicated.
self.assertEqual(len(cache), 4)
expected_path = os.path.join("fs", "other-recursive.html")
self.assertTrue(
cache["other-recursive.html"].origin.name.endswith(expected_path)
)
def test_unique_history_per_loader(self):
"""
Extending should continue even if two loaders return the same
name for a template.
"""
engine = Engine(
loaders=[
[
"django.template.loaders.locmem.Loader",
{
"base.html": (
'{% extends "base.html" %}{% block content %}'
"{{ block.super }} loader1{% endblock %}"
),
},
],
[
"django.template.loaders.locmem.Loader",
{
"base.html": "{% block content %}loader2{% endblock %}",
},
],
]
)
template = engine.get_template("base.html")
output = template.render(Context({}))
self.assertEqual(output.strip(), "loader2 loader1")
def test_block_override_in_extended_included_template(self):
"""
ExtendsNode.find_template() initializes history with self.origin
(#28071).
"""
engine = Engine(
loaders=[
[
"django.template.loaders.locmem.Loader",
{
"base.html": (
"{% extends 'base.html' %}{% block base %}{{ block.super }}"
"2{% endblock %}"
),
"included.html": (
"{% extends 'included.html' %}{% block included %}"
"{{ block.super }}B{% endblock %}"
),
},
],
[
"django.template.loaders.locmem.Loader",
{
"base.html": (
"{% block base %}1{% endblock %}"
"{% include 'included.html' %}"
),
"included.html": "{% block included %}A{% endblock %}",
},
],
],
)
template = engine.get_template("base.html")
self.assertEqual(template.render(Context({})), "12AB")
@setup(
{"index.html": "{% block content %}B{% endblock %}{% extends 'base.html' %}"}
)
def test_extends_not_first_tag_in_extended_template(self):
msg = "{% extends 'base.html' %} must be the first tag in 'index.html'."
with self.assertRaisesMessage(TemplateSyntaxError, msg):
self.engine.get_template("index.html")
def test_extends_not_first_tag_in_extended_template_from_string(self):
template_string = "{% block content %}B{% endblock %}{% extends 'base.html' %}"
msg = "{% extends 'base.html' %} must be the first tag in the template."
with self.assertRaisesMessage(TemplateSyntaxError, msg):
Engine().from_string(template_string)
|
