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django/tests/template_tests/syntax_tests/test_basic.py
2022-02-07 20:37:05 +01:00

359 lines
13 KiB
Python

from django.template.base import TemplateSyntaxError
from django.template.context import Context
from django.template.loader_tags import BlockContext, BlockNode
from django.test import SimpleTestCase
from ..utils import SilentAttrClass, SilentGetItemClass, SomeClass, setup
basic_templates = {
"basic-syntax01": "something cool",
"basic-syntax02": "{{ headline }}",
"basic-syntax03": "{{ first }} --- {{ second }}",
}
class BasicSyntaxTests(SimpleTestCase):
@setup(basic_templates)
def test_basic_syntax01(self):
"""
Plain text should go through the template parser untouched.
"""
output = self.engine.render_to_string("basic-syntax01")
self.assertEqual(output, "something cool")
@setup(basic_templates)
def test_basic_syntax02(self):
"""
Variables should be replaced with their value in the current
context
"""
output = self.engine.render_to_string("basic-syntax02", {"headline": "Success"})
self.assertEqual(output, "Success")
@setup(basic_templates)
def test_basic_syntax03(self):
"""
More than one replacement variable is allowed in a template
"""
output = self.engine.render_to_string(
"basic-syntax03", {"first": 1, "second": 2}
)
self.assertEqual(output, "1 --- 2")
@setup({"basic-syntax04": "as{{ missing }}df"})
def test_basic_syntax04(self):
"""
Fail silently when a variable is not found in the current context
"""
output = self.engine.render_to_string("basic-syntax04")
if self.engine.string_if_invalid:
self.assertEqual(output, "asINVALIDdf")
else:
self.assertEqual(output, "asdf")
@setup({"basic-syntax06": "{{ multi word variable }}"})
def test_basic_syntax06(self):
"""
A variable may not contain more than one word
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax06")
@setup({"basic-syntax07": "{{ }}"})
def test_basic_syntax07(self):
"""
Raise TemplateSyntaxError for empty variable tags.
"""
with self.assertRaisesMessage(
TemplateSyntaxError, "Empty variable tag on line 1"
):
self.engine.get_template("basic-syntax07")
@setup({"basic-syntax08": "{{ }}"})
def test_basic_syntax08(self):
"""
Raise TemplateSyntaxError for empty variable tags.
"""
with self.assertRaisesMessage(
TemplateSyntaxError, "Empty variable tag on line 1"
):
self.engine.get_template("basic-syntax08")
@setup({"basic-syntax09": "{{ var.method }}"})
def test_basic_syntax09(self):
"""
Attribute syntax allows a template to call an object's attribute
"""
output = self.engine.render_to_string("basic-syntax09", {"var": SomeClass()})
self.assertEqual(output, "SomeClass.method")
@setup({"basic-syntax10": "{{ var.otherclass.method }}"})
def test_basic_syntax10(self):
"""
Multiple levels of attribute access are allowed.
"""
output = self.engine.render_to_string("basic-syntax10", {"var": SomeClass()})
self.assertEqual(output, "OtherClass.method")
@setup({"basic-syntax11": "{{ var.blech }}"})
def test_basic_syntax11(self):
"""
Fail silently when a variable's attribute isn't found.
"""
output = self.engine.render_to_string("basic-syntax11", {"var": SomeClass()})
if self.engine.string_if_invalid:
self.assertEqual(output, "INVALID")
else:
self.assertEqual(output, "")
@setup({"basic-syntax12": "{{ var.__dict__ }}"})
def test_basic_syntax12(self):
"""
Raise TemplateSyntaxError when trying to access a variable
beginning with an underscore.
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax12")
# Raise TemplateSyntaxError when trying to access a variable
# containing an illegal character.
@setup({"basic-syntax13": "{{ va>r }}"})
def test_basic_syntax13(self):
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax13")
@setup({"basic-syntax14": "{{ (var.r) }}"})
def test_basic_syntax14(self):
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax14")
@setup({"basic-syntax15": "{{ sp%am }}"})
def test_basic_syntax15(self):
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax15")
@setup({"basic-syntax16": "{{ eggs! }}"})
def test_basic_syntax16(self):
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax16")
@setup({"basic-syntax17": "{{ moo? }}"})
def test_basic_syntax17(self):
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax17")
@setup({"basic-syntax18": "{{ foo.bar }}"})
def test_basic_syntax18(self):
"""
Attribute syntax allows a template to call a dictionary key's
value.
"""
output = self.engine.render_to_string("basic-syntax18", {"foo": {"bar": "baz"}})
self.assertEqual(output, "baz")
@setup({"basic-syntax19": "{{ foo.spam }}"})
def test_basic_syntax19(self):
"""
Fail silently when a variable's dictionary key isn't found.
"""
output = self.engine.render_to_string("basic-syntax19", {"foo": {"bar": "baz"}})
if self.engine.string_if_invalid:
self.assertEqual(output, "INVALID")
else:
self.assertEqual(output, "")
@setup({"basic-syntax20": "{{ var.method2 }}"})
def test_basic_syntax20(self):
"""
Fail silently when accessing a non-simple method
"""
output = self.engine.render_to_string("basic-syntax20", {"var": SomeClass()})
if self.engine.string_if_invalid:
self.assertEqual(output, "INVALID")
else:
self.assertEqual(output, "")
@setup({"basic-syntax20b": "{{ var.method5 }}"})
def test_basic_syntax20b(self):
"""
Don't silence a TypeError if it was raised inside a callable.
"""
template = self.engine.get_template("basic-syntax20b")
with self.assertRaises(TypeError):
template.render(Context({"var": SomeClass()}))
# Don't get confused when parsing something that is almost, but not
# quite, a template tag.
@setup({"basic-syntax21": "a {{ moo %} b"})
def test_basic_syntax21(self):
output = self.engine.render_to_string("basic-syntax21")
self.assertEqual(output, "a {{ moo %} b")
@setup({"basic-syntax22": "{{ moo #}"})
def test_basic_syntax22(self):
output = self.engine.render_to_string("basic-syntax22")
self.assertEqual(output, "{{ moo #}")
@setup({"basic-syntax23": "{{ moo #} {{ cow }}"})
def test_basic_syntax23(self):
"""
Treat "moo #} {{ cow" as the variable. Not ideal, but costly to work
around, so this triggers an error.
"""
with self.assertRaises(TemplateSyntaxError):
self.engine.get_template("basic-syntax23")
@setup({"basic-syntax24": "{{ moo\n }}"})
def test_basic_syntax24(self):
"""
Embedded newlines make it not-a-tag.
"""
output = self.engine.render_to_string("basic-syntax24")
self.assertEqual(output, "{{ moo\n }}")
# Literal strings are permitted inside variables, mostly for i18n
# purposes.
@setup({"basic-syntax25": '{{ "fred" }}'})
def test_basic_syntax25(self):
output = self.engine.render_to_string("basic-syntax25")
self.assertEqual(output, "fred")
@setup({"basic-syntax26": r'{{ "\"fred\"" }}'})
def test_basic_syntax26(self):
output = self.engine.render_to_string("basic-syntax26")
self.assertEqual(output, '"fred"')
@setup({"basic-syntax27": r'{{ _("\"fred\"") }}'})
def test_basic_syntax27(self):
output = self.engine.render_to_string("basic-syntax27")
self.assertEqual(output, '"fred"')
# #12554 -- Make sure a silent_variable_failure Exception is
# suppressed on dictionary and attribute lookup.
@setup({"basic-syntax28": "{{ a.b }}"})
def test_basic_syntax28(self):
output = self.engine.render_to_string(
"basic-syntax28", {"a": SilentGetItemClass()}
)
if self.engine.string_if_invalid:
self.assertEqual(output, "INVALID")
else:
self.assertEqual(output, "")
@setup({"basic-syntax29": "{{ a.b }}"})
def test_basic_syntax29(self):
output = self.engine.render_to_string(
"basic-syntax29", {"a": SilentAttrClass()}
)
if self.engine.string_if_invalid:
self.assertEqual(output, "INVALID")
else:
self.assertEqual(output, "")
# Something that starts like a number but has an extra lookup works
# as a lookup.
@setup({"basic-syntax30": "{{ 1.2.3 }}"})
def test_basic_syntax30(self):
output = self.engine.render_to_string(
"basic-syntax30", {"1": {"2": {"3": "d"}}}
)
self.assertEqual(output, "d")
@setup({"basic-syntax31": "{{ 1.2.3 }}"})
def test_basic_syntax31(self):
output = self.engine.render_to_string(
"basic-syntax31",
{"1": {"2": ("a", "b", "c", "d")}},
)
self.assertEqual(output, "d")
@setup({"basic-syntax32": "{{ 1.2.3 }}"})
def test_basic_syntax32(self):
output = self.engine.render_to_string(
"basic-syntax32",
{"1": (("x", "x", "x", "x"), ("y", "y", "y", "y"), ("a", "b", "c", "d"))},
)
self.assertEqual(output, "d")
@setup({"basic-syntax33": "{{ 1.2.3 }}"})
def test_basic_syntax33(self):
output = self.engine.render_to_string(
"basic-syntax33",
{"1": ("xxxx", "yyyy", "abcd")},
)
self.assertEqual(output, "d")
@setup({"basic-syntax34": "{{ 1.2.3 }}"})
def test_basic_syntax34(self):
output = self.engine.render_to_string(
"basic-syntax34", {"1": ({"x": "x"}, {"y": "y"}, {"z": "z", "3": "d"})}
)
self.assertEqual(output, "d")
# Numbers are numbers even if their digits are in the context.
@setup({"basic-syntax35": "{{ 1 }}"})
def test_basic_syntax35(self):
output = self.engine.render_to_string("basic-syntax35", {"1": "abc"})
self.assertEqual(output, "1")
@setup({"basic-syntax36": "{{ 1.2 }}"})
def test_basic_syntax36(self):
output = self.engine.render_to_string("basic-syntax36", {"1": "abc"})
self.assertEqual(output, "1.2")
@setup({"basic-syntax37": "{{ callable }}"})
def test_basic_syntax37(self):
"""
Call methods in the top level of the context.
"""
output = self.engine.render_to_string(
"basic-syntax37", {"callable": lambda: "foo bar"}
)
self.assertEqual(output, "foo bar")
@setup({"basic-syntax38": "{{ var.callable }}"})
def test_basic_syntax38(self):
"""
Call methods returned from dictionary lookups.
"""
output = self.engine.render_to_string(
"basic-syntax38", {"var": {"callable": lambda: "foo bar"}}
)
self.assertEqual(output, "foo bar")
@setup({"template": "{% block content %}"})
def test_unclosed_block(self):
msg = "Unclosed tag on line 1: 'block'. Looking for one of: endblock."
with self.assertRaisesMessage(TemplateSyntaxError, msg):
self.engine.render_to_string("template")
@setup({"template": "{% if a %}"})
def test_unclosed_block2(self):
msg = "Unclosed tag on line 1: 'if'. Looking for one of: elif, else, endif."
with self.assertRaisesMessage(TemplateSyntaxError, msg):
self.engine.render_to_string("template")
@setup({"tpl-str": "%s", "tpl-percent": "%%", "tpl-weird-percent": "% %s"})
def test_ignores_strings_that_look_like_format_interpolation(self):
output = self.engine.render_to_string("tpl-str")
self.assertEqual(output, "%s")
output = self.engine.render_to_string("tpl-percent")
self.assertEqual(output, "%%")
output = self.engine.render_to_string("tpl-weird-percent")
self.assertEqual(output, "% %s")
class BlockContextTests(SimpleTestCase):
def test_repr(self):
block_context = BlockContext()
block_context.add_blocks({"content": BlockNode("content", [])})
self.assertEqual(
repr(block_context),
"<BlockContext: blocks=defaultdict(<class 'list'>, "
"{'content': [<Block Node: content. Contents: []>]})>",
)