from __future__ import unicode_literals import os from unittest import skipUnless from django.template import Context, Engine, TemplateSyntaxError from django.template.base import Node from django.template.library import InvalidTemplateLibrary from django.test import SimpleTestCase from django.test.utils import extend_sys_path from django.utils import six from .templatetags import custom, inclusion from .utils import ROOT LIBRARIES = { 'custom': 'template_tests.templatetags.custom', 'inclusion': 'template_tests.templatetags.inclusion', } class CustomFilterTests(SimpleTestCase): def test_filter(self): engine = Engine(libraries=LIBRARIES) t = engine.from_string("{% load custom %}{{ string|trim:5 }}") self.assertEqual( t.render(Context({"string": "abcdefghijklmnopqrstuvwxyz"})), "abcde" ) class TagTestCase(SimpleTestCase): @classmethod def setUpClass(cls): cls.engine = Engine(app_dirs=True, libraries=LIBRARIES) super(TagTestCase, cls).setUpClass() def verify_tag(self, tag, name): self.assertEqual(tag.__name__, name) self.assertEqual(tag.__doc__, 'Expected %s __doc__' % name) self.assertEqual(tag.__dict__['anything'], 'Expected %s __dict__' % name) class SimpleTagTests(TagTestCase): def test_simple_tags(self): c = Context({'value': 42}) templates = [ ('{% load custom %}{% no_params %}', 'no_params - Expected result'), ('{% load custom %}{% one_param 37 %}', 'one_param - Expected result: 37'), ('{% load custom %}{% explicit_no_context 37 %}', 'explicit_no_context - Expected result: 37'), ('{% load custom %}{% no_params_with_context %}', 'no_params_with_context - Expected result (context value: 42)'), ('{% load custom %}{% params_and_context 37 %}', 'params_and_context - Expected result (context value: 42): 37'), ('{% load custom %}{% simple_two_params 37 42 %}', 'simple_two_params - Expected result: 37, 42'), ('{% load custom %}{% simple_one_default 37 %}', 'simple_one_default - Expected result: 37, hi'), ('{% load custom %}{% simple_one_default 37 two="hello" %}', 'simple_one_default - Expected result: 37, hello'), ('{% load custom %}{% simple_one_default one=99 two="hello" %}', 'simple_one_default - Expected result: 99, hello'), ('{% load custom %}{% simple_one_default 37 42 %}', 'simple_one_default - Expected result: 37, 42'), ('{% load custom %}{% simple_unlimited_args 37 %}', 'simple_unlimited_args - Expected result: 37, hi'), ('{% load custom %}{% simple_unlimited_args 37 42 56 89 %}', 'simple_unlimited_args - Expected result: 37, 42, 56, 89'), ('{% load custom %}{% simple_only_unlimited_args %}', 'simple_only_unlimited_args - Expected result: '), ('{% load custom %}{% simple_only_unlimited_args 37 42 56 89 %}', 'simple_only_unlimited_args - Expected result: 37, 42, 56, 89'), ('{% load custom %}{% simple_unlimited_args_kwargs 37 40|add:2 56 eggs="scrambled" four=1|add:3 %}', 'simple_unlimited_args_kwargs - Expected result: 37, 42, 56 / eggs=scrambled, four=4'), ] for entry in templates: t = self.engine.from_string(entry[0]) self.assertEqual(t.render(c), entry[1]) for entry in templates: t = self.engine.from_string("%s as var %%}Result: {{ var }}" % entry[0][0:-2]) self.assertEqual(t.render(c), "Result: %s" % entry[1]) def test_simple_tag_errors(self): errors = [ ("'simple_one_default' received unexpected keyword argument 'three'", '{% load custom %}{% simple_one_default 99 two="hello" three="foo" %}'), ("'simple_two_params' received too many positional arguments", '{% load custom %}{% simple_two_params 37 42 56 %}'), ("'simple_one_default' received too many positional arguments", '{% load custom %}{% simple_one_default 37 42 56 %}'), ("'simple_unlimited_args_kwargs' received some positional argument(s) after some keyword argument(s)", '{% load custom %}{% simple_unlimited_args_kwargs 37 40|add:2 eggs="scrambled" 56 four=1|add:3 %}'), ("'simple_unlimited_args_kwargs' received multiple values for keyword argument 'eggs'", '{% load custom %}{% simple_unlimited_args_kwargs 37 eggs="scrambled" eggs="scrambled" %}'), ] for entry in errors: with self.assertRaisesMessage(TemplateSyntaxError, entry[0]): self.engine.from_string(entry[1]) for entry in errors: with self.assertRaisesMessage(TemplateSyntaxError, entry[0]): self.engine.from_string("%s as var %%}" % entry[1][0:-2]) def test_simple_tag_escaping_autoescape_off(self): c = Context({'name': "Jack & Jill"}, autoescape=False) t = self.engine.from_string("{% load custom %}{% escape_naive %}") self.assertEqual(t.render(c), "Hello Jack & Jill!") def test_simple_tag_naive_escaping(self): c = Context({'name': "Jack & Jill"}) t = self.engine.from_string("{% load custom %}{% escape_naive %}") self.assertEqual(t.render(c), "Hello Jack & Jill!") def test_simple_tag_explicit_escaping(self): # Check we don't double escape c = Context({'name': "Jack & Jill"}) t = self.engine.from_string("{% load custom %}{% escape_explicit %}") self.assertEqual(t.render(c), "Hello Jack & Jill!") def test_simple_tag_format_html_escaping(self): # Check we don't double escape c = Context({'name': "Jack & Jill"}) t = self.engine.from_string("{% load custom %}{% escape_format_html %}") self.assertEqual(t.render(c), "Hello Jack & Jill!") def test_simple_tag_registration(self): # Test that the decorators preserve the decorated function's docstring, name and attributes. self.verify_tag(custom.no_params, 'no_params') self.verify_tag(custom.one_param, 'one_param') self.verify_tag(custom.explicit_no_context, 'explicit_no_context') self.verify_tag(custom.no_params_with_context, 'no_params_with_context') self.verify_tag(custom.params_and_context, 'params_and_context') self.verify_tag(custom.simple_unlimited_args_kwargs, 'simple_unlimited_args_kwargs') self.verify_tag(custom.simple_tag_without_context_parameter, 'simple_tag_without_context_parameter') def test_simple_tag_missing_context(self): # The 'context' parameter must be present when takes_context is True msg = ( "'simple_tag_without_context_parameter' is decorated with " "takes_context=True so it must have a first argument of 'context'" ) with self.assertRaisesMessage(TemplateSyntaxError, msg): self.engine.from_string('{% load custom %}{% simple_tag_without_context_parameter 123 %}') class InclusionTagTests(TagTestCase): def test_inclusion_tags(self): c = Context({'value': 42}) templates = [ ('{% load inclusion %}{% inclusion_no_params %}', 'inclusion_no_params - Expected result\n'), ('{% load inclusion %}{% inclusion_one_param 37 %}', 'inclusion_one_param - Expected result: 37\n'), ('{% load inclusion %}{% inclusion_explicit_no_context 37 %}', 'inclusion_explicit_no_context - Expected result: 37\n'), ('{% load inclusion %}{% inclusion_no_params_with_context %}', 'inclusion_no_params_with_context - Expected result (context value: 42)\n'), ('{% load inclusion %}{% inclusion_params_and_context 37 %}', 'inclusion_params_and_context - Expected result (context value: 42): 37\n'), ('{% load inclusion %}{% inclusion_two_params 37 42 %}', 'inclusion_two_params - Expected result: 37, 42\n'), ( '{% load inclusion %}{% inclusion_one_default 37 %}', 'inclusion_one_default - Expected result: 37, hi\n' ), ('{% load inclusion %}{% inclusion_one_default 37 two="hello" %}', 'inclusion_one_default - Expected result: 37, hello\n'), ('{% load inclusion %}{% inclusion_one_default one=99 two="hello" %}', 'inclusion_one_default - Expected result: 99, hello\n'), ('{% load inclusion %}{% inclusion_one_default 37 42 %}', 'inclusion_one_default - Expected result: 37, 42\n'), ('{% load inclusion %}{% inclusion_unlimited_args 37 %}', 'inclusion_unlimited_args - Expected result: 37, hi\n'), ('{% load inclusion %}{% inclusion_unlimited_args 37 42 56 89 %}', 'inclusion_unlimited_args - Expected result: 37, 42, 56, 89\n'), ('{% load inclusion %}{% inclusion_only_unlimited_args %}', 'inclusion_only_unlimited_args - Expected result: \n'), ('{% load inclusion %}{% inclusion_only_unlimited_args 37 42 56 89 %}', 'inclusion_only_unlimited_args - Expected result: 37, 42, 56, 89\n'), ('{% load inclusion %}{% inclusion_unlimited_args_kwargs 37 40|add:2 56 eggs="scrambled" four=1|add:3 %}', 'inclusion_unlimited_args_kwargs - Expected result: 37, 42, 56 / eggs=scrambled, four=4\n'), ] for entry in templates: t = self.engine.from_string(entry[0]) self.assertEqual(t.render(c), entry[1]) def test_inclusion_tag_errors(self): errors = [ ("'inclusion_one_default' received unexpected keyword argument 'three'", '{% load inclusion %}{% inclusion_one_default 99 two="hello" three="foo" %}'), ("'inclusion_two_params' received too many positional arguments", '{% load inclusion %}{% inclusion_two_params 37 42 56 %}'), ("'inclusion_one_default' received too many positional arguments", '{% load inclusion %}{% inclusion_one_default 37 42 56 %}'), ("'inclusion_one_default' did not receive value(s) for the argument(s): 'one'", '{% load inclusion %}{% inclusion_one_default %}'), ("'inclusion_unlimited_args' did not receive value(s) for the argument(s): 'one'", '{% load inclusion %}{% inclusion_unlimited_args %}'), ( "'inclusion_unlimited_args_kwargs' received some positional argument(s) " "after some keyword argument(s)", '{% load inclusion %}{% inclusion_unlimited_args_kwargs 37 40|add:2 eggs="boiled" 56 four=1|add:3 %}', ), ("'inclusion_unlimited_args_kwargs' received multiple values for keyword argument 'eggs'", '{% load inclusion %}{% inclusion_unlimited_args_kwargs 37 eggs="scrambled" eggs="scrambled" %}'), ] for entry in errors: with self.assertRaisesMessage(TemplateSyntaxError, entry[0]): self.engine.from_string(entry[1]) def test_include_tag_missing_context(self): # The 'context' parameter must be present when takes_context is True msg = ( "'inclusion_tag_without_context_parameter' is decorated with " "takes_context=True so it must have a first argument of 'context'" ) with self.assertRaisesMessage(TemplateSyntaxError, msg): self.engine.from_string('{% load inclusion %}{% inclusion_tag_without_context_parameter 123 %}') def test_inclusion_tags_from_template(self): c = Context({'value': 42}) templates = [ ('{% load inclusion %}{% inclusion_no_params_from_template %}', 'inclusion_no_params_from_template - Expected result\n'), ('{% load inclusion %}{% inclusion_one_param_from_template 37 %}', 'inclusion_one_param_from_template - Expected result: 37\n'), ('{% load inclusion %}{% inclusion_explicit_no_context_from_template 37 %}', 'inclusion_explicit_no_context_from_template - Expected result: 37\n'), ('{% load inclusion %}{% inclusion_no_params_with_context_from_template %}', 'inclusion_no_params_with_context_from_template - Expected result (context value: 42)\n'), ('{% load inclusion %}{% inclusion_params_and_context_from_template 37 %}', 'inclusion_params_and_context_from_template - Expected result (context value: 42): 37\n'), ('{% load inclusion %}{% inclusion_two_params_from_template 37 42 %}', 'inclusion_two_params_from_template - Expected result: 37, 42\n'), ('{% load inclusion %}{% inclusion_one_default_from_template 37 %}', 'inclusion_one_default_from_template - Expected result: 37, hi\n'), ('{% load inclusion %}{% inclusion_one_default_from_template 37 42 %}', 'inclusion_one_default_from_template - Expected result: 37, 42\n'), ('{% load inclusion %}{% inclusion_unlimited_args_from_template 37 %}', 'inclusion_unlimited_args_from_template - Expected result: 37, hi\n'), ('{% load inclusion %}{% inclusion_unlimited_args_from_template 37 42 56 89 %}', 'inclusion_unlimited_args_from_template - Expected result: 37, 42, 56, 89\n'), ('{% load inclusion %}{% inclusion_only_unlimited_args_from_template %}', 'inclusion_only_unlimited_args_from_template - Expected result: \n'), ('{% load inclusion %}{% inclusion_only_unlimited_args_from_template 37 42 56 89 %}', 'inclusion_only_unlimited_args_from_template - Expected result: 37, 42, 56, 89\n'), ] for entry in templates: t = self.engine.from_string(entry[0]) self.assertEqual(t.render(c), entry[1]) def test_inclusion_tag_registration(self): # Test that the decorators preserve the decorated function's docstring, name and attributes. self.verify_tag(inclusion.inclusion_no_params, 'inclusion_no_params') self.verify_tag(inclusion.inclusion_one_param, 'inclusion_one_param') self.verify_tag(inclusion.inclusion_explicit_no_context, 'inclusion_explicit_no_context') self.verify_tag(inclusion.inclusion_no_params_with_context, 'inclusion_no_params_with_context') self.verify_tag(inclusion.inclusion_params_and_context, 'inclusion_params_and_context') self.verify_tag(inclusion.inclusion_two_params, 'inclusion_two_params') self.verify_tag(inclusion.inclusion_one_default, 'inclusion_one_default') self.verify_tag(inclusion.inclusion_unlimited_args, 'inclusion_unlimited_args') self.verify_tag(inclusion.inclusion_only_unlimited_args, 'inclusion_only_unlimited_args') self.verify_tag(inclusion.inclusion_tag_without_context_parameter, 'inclusion_tag_without_context_parameter') self.verify_tag(inclusion.inclusion_tag_use_l10n, 'inclusion_tag_use_l10n') self.verify_tag(inclusion.inclusion_unlimited_args_kwargs, 'inclusion_unlimited_args_kwargs') def test_15070_use_l10n(self): """ Test that inclusion tag passes down `use_l10n` of context to the Context of the included/rendered template as well. """ c = Context({}) t = self.engine.from_string('{% load inclusion %}{% inclusion_tag_use_l10n %}') self.assertEqual(t.render(c).strip(), 'None') c.use_l10n = True self.assertEqual(t.render(c).strip(), 'True') def test_no_render_side_effect(self): """ #23441 -- InclusionNode shouldn't modify its nodelist at render time. """ engine = Engine(app_dirs=True, libraries=LIBRARIES) template = engine.from_string('{% load inclusion %}{% inclusion_no_params %}') count = template.nodelist.get_nodes_by_type(Node) template.render(Context({})) self.assertEqual(template.nodelist.get_nodes_by_type(Node), count) def test_render_context_is_cleared(self): """ #24555 -- InclusionNode should push and pop the render_context stack when rendering. Otherwise, leftover values such as blocks from extending can interfere with subsequent rendering. """ engine = Engine(app_dirs=True, libraries=LIBRARIES) template = engine.from_string('{% load inclusion %}{% inclusion_extends1 %}{% inclusion_extends2 %}') self.assertEqual(template.render(Context({})).strip(), 'one\ntwo') class AssignmentTagTests(TagTestCase): def test_assignment_tags(self): c = Context({'value': 42}) t = self.engine.from_string('{% load custom %}{% assignment_no_params as var %}The result is: {{ var }}') self.assertEqual(t.render(c), 'The result is: assignment_no_params - Expected result') def test_assignment_tag_registration(self): # Test that the decorators preserve the decorated function's docstring, name and attributes. self.verify_tag(custom.assignment_no_params, 'assignment_no_params') def test_assignment_tag_missing_context(self): # The 'context' parameter must be present when takes_context is True msg = ( "'assignment_tag_without_context_parameter' is decorated with " "takes_context=True so it must have a first argument of 'context'" ) with self.assertRaisesMessage(TemplateSyntaxError, msg): self.engine.from_string('{% load custom %}{% assignment_tag_without_context_parameter 123 as var %}') class TemplateTagLoadingTests(SimpleTestCase): @classmethod def setUpClass(cls): cls.egg_dir = os.path.join(ROOT, 'eggs') super(TemplateTagLoadingTests, cls).setUpClass() def test_load_error(self): msg = ( "Invalid template library specified. ImportError raised when " "trying to load 'template_tests.broken_tag': cannot import name " "'?Xtemplate'?" ) with six.assertRaisesRegex(self, InvalidTemplateLibrary, msg): Engine(libraries={ 'broken_tag': 'template_tests.broken_tag', }) def test_load_error_egg(self): egg_name = '%s/tagsegg.egg' % self.egg_dir msg = ( "Invalid template library specified. ImportError raised when " "trying to load 'tagsegg.templatetags.broken_egg': cannot " "import name '?Xtemplate'?" ) with extend_sys_path(egg_name): with six.assertRaisesRegex(self, InvalidTemplateLibrary, msg): Engine(libraries={ 'broken_egg': 'tagsegg.templatetags.broken_egg', }) def test_load_working_egg(self): ttext = "{% load working_egg %}" egg_name = '%s/tagsegg.egg' % self.egg_dir with extend_sys_path(egg_name): engine = Engine(libraries={ 'working_egg': 'tagsegg.templatetags.working_egg', }) engine.from_string(ttext) @skipUnless(six.PY3, "Python 3 only -- Python 2 doesn't have annotations.") def test_load_annotated_function(self): Engine(libraries={ 'annotated_tag_function': 'template_tests.annotated_tag_function', })