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from pathlib import Path
from unittest import mock, skipIf
from django.contrib.auth.models import User
from django.template import TemplateSyntaxError
from django.test import RequestFactory, TestCase
from .test_dummy import TemplateStringsTests
try:
import jinja2
except ImportError:
jinja2 = None
Jinja2 = None
else:
from django.template.backends.jinja2 import Jinja2
@skipIf(jinja2 is None, "this test requires jinja2")
class Jinja2Tests(TemplateStringsTests):
engine_class = Jinja2
backend_name = "jinja2"
options = {
"keep_trailing_newline": True,
"context_processors": [
"django.template.context_processors.static",
],
}
def test_origin(self):
template = self.engine.get_template("template_backends/hello.html")
self.assertTrue(template.origin.name.endswith("hello.html"))
self.assertEqual(template.origin.template_name, "template_backends/hello.html")
def test_origin_from_string(self):
template = self.engine.from_string("Hello!\n")
self.assertEqual(template.origin.name, "<template>")
self.assertIsNone(template.origin.template_name)
def test_self_context(self):
"""
Using 'self' in the context should not throw errors (#24538).
"""
# self will be overridden to be a TemplateReference, so the self
# variable will not come through. Attempting to use one though should
# not throw an error.
template = self.engine.from_string("hello {{ foo }}!")
content = template.render(context={"self": "self", "foo": "world"})
self.assertEqual(content, "hello world!")
def test_exception_debug_info_min_context(self):
with self.assertRaises(TemplateSyntaxError) as e:
self.engine.get_template("template_backends/syntax_error.html")
debug = e.exception.template_debug
self.assertEqual(debug["after"], "")
self.assertEqual(debug["before"], "")
self.assertEqual(debug["during"], "{% block %}")
self.assertEqual(debug["bottom"], 1)
self.assertEqual(debug["top"], 0)
self.assertEqual(debug["line"], 1)
self.assertEqual(debug["total"], 1)
self.assertEqual(len(debug["source_lines"]), 1)
self.assertTrue(debug["name"].endswith("syntax_error.html"))
self.assertIn("message", debug)
def test_exception_debug_info_max_context(self):
with self.assertRaises(TemplateSyntaxError) as e:
self.engine.get_template("template_backends/syntax_error2.html")
debug = e.exception.template_debug
self.assertEqual(debug["after"], "")
self.assertEqual(debug["before"], "")
self.assertEqual(debug["during"], "{% block %}")
self.assertEqual(debug["bottom"], 26)
self.assertEqual(debug["top"], 5)
self.assertEqual(debug["line"], 16)
self.assertEqual(debug["total"], 31)
self.assertEqual(len(debug["source_lines"]), 21)
self.assertTrue(debug["name"].endswith("syntax_error2.html"))
self.assertIn("message", debug)
def test_context_processors(self):
request = RequestFactory().get("/")
template = self.engine.from_string("Static URL: {{ STATIC_URL }}")
content = template.render(request=request)
self.assertEqual(content, "Static URL: /static/")
with self.settings(STATIC_URL="/s/"):
content = template.render(request=request)
self.assertEqual(content, "Static URL: /s/")
def test_dirs_pathlib(self):
engine = Jinja2(
{
"DIRS": [Path(__file__).parent / "templates" / "template_backends"],
"APP_DIRS": False,
"NAME": "jinja2",
"OPTIONS": {},
}
)
template = engine.get_template("hello.html")
self.assertEqual(template.render({"name": "Joe"}), "Hello Joe!")
def test_template_render_nested_error(self):
template = self.engine.get_template(
"template_backends/syntax_error_include.html"
)
with self.assertRaises(TemplateSyntaxError) as e:
template.render(context={})
debug = e.exception.template_debug
self.assertEqual(debug["after"], "")
self.assertEqual(debug["before"], "")
self.assertEqual(debug["during"], "{% block %}")
self.assertEqual(debug["bottom"], 1)
self.assertEqual(debug["top"], 0)
self.assertEqual(debug["line"], 1)
self.assertEqual(debug["total"], 1)
self.assertEqual(len(debug["source_lines"]), 1)
self.assertTrue(debug["name"].endswith("syntax_error.html"))
self.assertIn("message", debug)
def test_template_render_error_nonexistent_source(self):
template = self.engine.get_template("template_backends/hello.html")
with mock.patch(
"jinja2.environment.Template.render",
side_effect=jinja2.TemplateSyntaxError("", 1, filename="nonexistent.html"),
):
with self.assertRaises(TemplateSyntaxError) as e:
template.render(context={})
debug = e.exception.template_debug
self.assertEqual(debug["after"], "")
self.assertEqual(debug["before"], "")
self.assertEqual(debug["during"], "")
self.assertEqual(debug["bottom"], 0)
self.assertEqual(debug["top"], 0)
self.assertEqual(debug["line"], 1)
self.assertEqual(debug["total"], 0)
self.assertEqual(len(debug["source_lines"]), 0)
self.assertTrue(debug["name"].endswith("nonexistent.html"))
self.assertIn("message", debug)
@skipIf(jinja2 is None, "this test requires jinja2")
class Jinja2SandboxTests(TestCase):
engine_class = Jinja2
backend_name = "jinja2"
options = {"environment": "jinja2.sandbox.SandboxedEnvironment"}
@classmethod
def setUpClass(cls):
super().setUpClass()
params = {
"DIRS": [],
"APP_DIRS": True,
"NAME": cls.backend_name,
"OPTIONS": cls.options,
}
cls.engine = cls.engine_class(params)
def test_set_alters_data(self):
template = self.engine.from_string(
"{% set test = User.objects.create_superuser("
"username='evil', email='a@b.com', password='xxx') %}"
"{{ test }}"
)
with self.assertRaises(jinja2.exceptions.SecurityError):
template.render(context={"User": User})
self.assertEqual(User.objects.count(), 0)
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