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# coding: utf-8
from __future__ import unicode_literals
from django.template import TemplateSyntaxError
from django.test import SimpleTestCase
from ..utils import SomeClass, SomeOtherException, UTF8Class, setup
class FilterSyntaxTests(SimpleTestCase):
@setup({'filter-syntax01': '{{ var|upper }}'})
def test_filter_syntax01(self):
"""
Basic filter usage
"""
output = self.engine.render_to_string('filter-syntax01', {"var": "Django is the greatest!"})
self.assertEqual(output, "DJANGO IS THE GREATEST!")
@setup({'filter-syntax02': '{{ var|upper|lower }}'})
def test_filter_syntax02(self):
"""
Chained filters
"""
output = self.engine.render_to_string('filter-syntax02', {"var": "Django is the greatest!"})
self.assertEqual(output, "django is the greatest!")
@setup({'filter-syntax03': '{{ var |upper }}'})
def test_filter_syntax03(self):
"""
Allow spaces before the filter pipe
"""
output = self.engine.render_to_string('filter-syntax03', {'var': 'Django is the greatest!'})
self.assertEqual(output, 'DJANGO IS THE GREATEST!')
@setup({'filter-syntax04': '{{ var| upper }}'})
def test_filter_syntax04(self):
"""
Allow spaces after the filter pipe
"""
output = self.engine.render_to_string('filter-syntax04', {'var': 'Django is the greatest!'})
self.assertEqual(output, 'DJANGO IS THE GREATEST!')
@setup({'filter-syntax05': '{{ var|does_not_exist }}'})
def test_filter_syntax05(self):
"""
Raise TemplateSyntaxError for a nonexistent filter
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template('filter-syntax05')
@setup({'filter-syntax06': '{{ var|fil(ter) }}'})
def test_filter_syntax06(self):
"""
Raise TemplateSyntaxError when trying to access a filter containing
an illegal character
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template('filter-syntax06')
@setup({'filter-syntax07': "{% nothing_to_see_here %}"})
def test_filter_syntax07(self):
"""
Raise TemplateSyntaxError for invalid block tags
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template('filter-syntax07')
@setup({'filter-syntax08': "{% %}"})
def test_filter_syntax08(self):
"""
Raise TemplateSyntaxError for empty block tags
"""
with self.assertRaisesMessage(TemplateSyntaxError, 'Empty block tag on line 1'):
self.engine.get_template('filter-syntax08')
@setup({'filter-syntax08-multi-line': "line 1\nline 2\nline 3{% %}\nline 4\nline 5"})
def test_filter_syntax08_multi_line(self):
"""
Raise TemplateSyntaxError for empty block tags in templates with
multiple lines.
"""
with self.assertRaisesMessage(TemplateSyntaxError, 'Empty block tag on line 3'):
self.engine.get_template('filter-syntax08-multi-line')
@setup({'filter-syntax09': '{{ var|cut:"o"|upper|lower }}'})
def test_filter_syntax09(self):
"""
Chained filters, with an argument to the first one
"""
output = self.engine.render_to_string('filter-syntax09', {'var': 'Foo'})
self.assertEqual(output, 'f')
@setup({'filter-syntax10': r'{{ var|default_if_none:" endquote\" hah" }}'})
def test_filter_syntax10(self):
"""
Literal string as argument is always "safe" from auto-escaping.
"""
output = self.engine.render_to_string('filter-syntax10', {"var": None})
self.assertEqual(output, ' endquote" hah')
@setup({'filter-syntax11': r'{{ var|default_if_none:var2 }}'})
def test_filter_syntax11(self):
"""
Variable as argument
"""
output = self.engine.render_to_string('filter-syntax11', {"var": None, "var2": "happy"})
self.assertEqual(output, 'happy')
@setup({'filter-syntax12': r'{{ var|yesno:"yup,nup,mup" }} {{ var|yesno }}'})
def test_filter_syntax12(self):
"""
Default argument testing
"""
output = self.engine.render_to_string('filter-syntax12', {"var": True})
self.assertEqual(output, 'yup yes')
@setup({'filter-syntax13': r'1{{ var.method3 }}2'})
def test_filter_syntax13(self):
"""
Fail silently for methods that raise an exception with a
`silent_variable_failure` attribute
"""
output = self.engine.render_to_string('filter-syntax13', {"var": SomeClass()})
if self.engine.string_if_invalid:
self.assertEqual(output, "1INVALID2")
else:
self.assertEqual(output, "12")
@setup({'filter-syntax14': r'1{{ var.method4 }}2'})
def test_filter_syntax14(self):
"""
In methods that raise an exception without a
`silent_variable_attribute` set to True, the exception propagates
"""
with self.assertRaises(SomeOtherException):
self.engine.render_to_string('filter-syntax14', {"var": SomeClass()})
@setup({'filter-syntax15': r'{{ var|default_if_none:"foo\bar" }}'})
def test_filter_syntax15(self):
"""
Escaped backslash in argument
"""
output = self.engine.render_to_string('filter-syntax15', {"var": None})
self.assertEqual(output, r'foo\bar')
@setup({'filter-syntax16': r'{{ var|default_if_none:"foo\now" }}'})
def test_filter_syntax16(self):
"""
Escaped backslash using known escape char
"""
output = self.engine.render_to_string('filter-syntax16', {"var": None})
self.assertEqual(output, r'foo\now')
@setup({'filter-syntax17': r'{{ var|join:"" }}'})
def test_filter_syntax17(self):
"""
Empty strings can be passed as arguments to filters
"""
output = self.engine.render_to_string('filter-syntax17', {'var': ['a', 'b', 'c']})
self.assertEqual(output, 'abc')
@setup({'filter-syntax18': r'{{ var }}'})
def test_filter_syntax18(self):
"""
Make sure that any unicode strings are converted to bytestrings
in the final output.
"""
output = self.engine.render_to_string('filter-syntax18', {'var': UTF8Class()})
self.assertEqual(output, '\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111')
@setup({'filter-syntax19': '{{ var|truncatewords:1 }}'})
def test_filter_syntax19(self):
"""
Numbers as filter arguments should work
"""
output = self.engine.render_to_string('filter-syntax19', {"var": "hello world"})
self.assertEqual(output, "hello ...")
@setup({'filter-syntax20': '{{ ""|default_if_none:"was none" }}'})
def test_filter_syntax20(self):
"""
Filters should accept empty string constants
"""
output = self.engine.render_to_string('filter-syntax20')
self.assertEqual(output, "")
@setup({'filter-syntax21': r'1{{ var.silent_fail_key }}2'})
def test_filter_syntax21(self):
"""
Fail silently for non-callable attribute and dict lookups which
raise an exception with a "silent_variable_failure" attribute
"""
output = self.engine.render_to_string('filter-syntax21', {"var": SomeClass()})
if self.engine.string_if_invalid:
self.assertEqual(output, "1INVALID2")
else:
self.assertEqual(output, "12")
@setup({'filter-syntax22': r'1{{ var.silent_fail_attribute }}2'})
def test_filter_syntax22(self):
"""
Fail silently for non-callable attribute and dict lookups which
raise an exception with a `silent_variable_failure` attribute
"""
output = self.engine.render_to_string('filter-syntax22', {"var": SomeClass()})
if self.engine.string_if_invalid:
self.assertEqual(output, "1INVALID2")
else:
self.assertEqual(output, "12")
@setup({'filter-syntax23': r'1{{ var.noisy_fail_key }}2'})
def test_filter_syntax23(self):
"""
In attribute and dict lookups that raise an unexpected exception
without a `silent_variable_attribute` set to True, the exception
propagates
"""
with self.assertRaises(SomeOtherException):
self.engine.render_to_string('filter-syntax23', {"var": SomeClass()})
@setup({'filter-syntax24': r'1{{ var.noisy_fail_attribute }}2'})
def test_filter_syntax24(self):
"""
In attribute and dict lookups that raise an unexpected exception
without a `silent_variable_attribute` set to True, the exception
propagates
"""
with self.assertRaises(SomeOtherException):
self.engine.render_to_string('filter-syntax24', {"var": SomeClass()})
@setup({'filter-syntax25': '{{ var.attribute_error_attribute }}'})
def test_filter_syntax25(self):
"""
#16383 - Attribute errors from an @property value should be
reraised.
"""
with self.assertRaises(AttributeError):
self.engine.render_to_string('filter-syntax25', {'var': SomeClass()})
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