You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
256 lines
5.8 KiB
Python
256 lines
5.8 KiB
Python
"""Built-in template tests used with the ``is`` operator."""
|
|
import operator
|
|
import typing as t
|
|
from collections import abc
|
|
from numbers import Number
|
|
|
|
from .runtime import Undefined
|
|
from .utils import pass_environment
|
|
|
|
if t.TYPE_CHECKING:
|
|
from .environment import Environment
|
|
|
|
|
|
def test_odd(value: int) -> bool:
|
|
"""Return true if the variable is odd."""
|
|
return value % 2 == 1
|
|
|
|
|
|
def test_even(value: int) -> bool:
|
|
"""Return true if the variable is even."""
|
|
return value % 2 == 0
|
|
|
|
|
|
def test_divisibleby(value: int, num: int) -> bool:
|
|
"""Check if a variable is divisible by a number."""
|
|
return value % num == 0
|
|
|
|
|
|
def test_defined(value: t.Any) -> bool:
|
|
"""Return true if the variable is defined:
|
|
|
|
.. sourcecode:: jinja
|
|
|
|
{% if variable is defined %}
|
|
value of variable: {{ variable }}
|
|
{% else %}
|
|
variable is not defined
|
|
{% endif %}
|
|
|
|
See the :func:`default` filter for a simple way to set undefined
|
|
variables.
|
|
"""
|
|
return not isinstance(value, Undefined)
|
|
|
|
|
|
def test_undefined(value: t.Any) -> bool:
|
|
"""Like :func:`defined` but the other way round."""
|
|
return isinstance(value, Undefined)
|
|
|
|
|
|
@pass_environment
|
|
def test_filter(env: "Environment", value: str) -> bool:
|
|
"""Check if a filter exists by name. Useful if a filter may be
|
|
optionally available.
|
|
|
|
.. code-block:: jinja
|
|
|
|
{% if 'markdown' is filter %}
|
|
{{ value | markdown }}
|
|
{% else %}
|
|
{{ value }}
|
|
{% endif %}
|
|
|
|
.. versionadded:: 3.0
|
|
"""
|
|
return value in env.filters
|
|
|
|
|
|
@pass_environment
|
|
def test_test(env: "Environment", value: str) -> bool:
|
|
"""Check if a test exists by name. Useful if a test may be
|
|
optionally available.
|
|
|
|
.. code-block:: jinja
|
|
|
|
{% if 'loud' is test %}
|
|
{% if value is loud %}
|
|
{{ value|upper }}
|
|
{% else %}
|
|
{{ value|lower }}
|
|
{% endif %}
|
|
{% else %}
|
|
{{ value }}
|
|
{% endif %}
|
|
|
|
.. versionadded:: 3.0
|
|
"""
|
|
return value in env.tests
|
|
|
|
|
|
def test_none(value: t.Any) -> bool:
|
|
"""Return true if the variable is none."""
|
|
return value is None
|
|
|
|
|
|
def test_boolean(value: t.Any) -> bool:
|
|
"""Return true if the object is a boolean value.
|
|
|
|
.. versionadded:: 2.11
|
|
"""
|
|
return value is True or value is False
|
|
|
|
|
|
def test_false(value: t.Any) -> bool:
|
|
"""Return true if the object is False.
|
|
|
|
.. versionadded:: 2.11
|
|
"""
|
|
return value is False
|
|
|
|
|
|
def test_true(value: t.Any) -> bool:
|
|
"""Return true if the object is True.
|
|
|
|
.. versionadded:: 2.11
|
|
"""
|
|
return value is True
|
|
|
|
|
|
# NOTE: The existing 'number' test matches booleans and floats
|
|
def test_integer(value: t.Any) -> bool:
|
|
"""Return true if the object is an integer.
|
|
|
|
.. versionadded:: 2.11
|
|
"""
|
|
return isinstance(value, int) and value is not True and value is not False
|
|
|
|
|
|
# NOTE: The existing 'number' test matches booleans and integers
|
|
def test_float(value: t.Any) -> bool:
|
|
"""Return true if the object is a float.
|
|
|
|
.. versionadded:: 2.11
|
|
"""
|
|
return isinstance(value, float)
|
|
|
|
|
|
def test_lower(value: str) -> bool:
|
|
"""Return true if the variable is lowercased."""
|
|
return str(value).islower()
|
|
|
|
|
|
def test_upper(value: str) -> bool:
|
|
"""Return true if the variable is uppercased."""
|
|
return str(value).isupper()
|
|
|
|
|
|
def test_string(value: t.Any) -> bool:
|
|
"""Return true if the object is a string."""
|
|
return isinstance(value, str)
|
|
|
|
|
|
def test_mapping(value: t.Any) -> bool:
|
|
"""Return true if the object is a mapping (dict etc.).
|
|
|
|
.. versionadded:: 2.6
|
|
"""
|
|
return isinstance(value, abc.Mapping)
|
|
|
|
|
|
def test_number(value: t.Any) -> bool:
|
|
"""Return true if the variable is a number."""
|
|
return isinstance(value, Number)
|
|
|
|
|
|
def test_sequence(value: t.Any) -> bool:
|
|
"""Return true if the variable is a sequence. Sequences are variables
|
|
that are iterable.
|
|
"""
|
|
try:
|
|
len(value)
|
|
value.__getitem__
|
|
except Exception:
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
def test_sameas(value: t.Any, other: t.Any) -> bool:
|
|
"""Check if an object points to the same memory address than another
|
|
object:
|
|
|
|
.. sourcecode:: jinja
|
|
|
|
{% if foo.attribute is sameas false %}
|
|
the foo attribute really is the `False` singleton
|
|
{% endif %}
|
|
"""
|
|
return value is other
|
|
|
|
|
|
def test_iterable(value: t.Any) -> bool:
|
|
"""Check if it's possible to iterate over an object."""
|
|
try:
|
|
iter(value)
|
|
except TypeError:
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
def test_escaped(value: t.Any) -> bool:
|
|
"""Check if the value is escaped."""
|
|
return hasattr(value, "__html__")
|
|
|
|
|
|
def test_in(value: t.Any, seq: t.Container) -> bool:
|
|
"""Check if value is in seq.
|
|
|
|
.. versionadded:: 2.10
|
|
"""
|
|
return value in seq
|
|
|
|
|
|
TESTS = {
|
|
"odd": test_odd,
|
|
"even": test_even,
|
|
"divisibleby": test_divisibleby,
|
|
"defined": test_defined,
|
|
"undefined": test_undefined,
|
|
"filter": test_filter,
|
|
"test": test_test,
|
|
"none": test_none,
|
|
"boolean": test_boolean,
|
|
"false": test_false,
|
|
"true": test_true,
|
|
"integer": test_integer,
|
|
"float": test_float,
|
|
"lower": test_lower,
|
|
"upper": test_upper,
|
|
"string": test_string,
|
|
"mapping": test_mapping,
|
|
"number": test_number,
|
|
"sequence": test_sequence,
|
|
"iterable": test_iterable,
|
|
"callable": callable,
|
|
"sameas": test_sameas,
|
|
"escaped": test_escaped,
|
|
"in": test_in,
|
|
"==": operator.eq,
|
|
"eq": operator.eq,
|
|
"equalto": operator.eq,
|
|
"!=": operator.ne,
|
|
"ne": operator.ne,
|
|
">": operator.gt,
|
|
"gt": operator.gt,
|
|
"greaterthan": operator.gt,
|
|
"ge": operator.ge,
|
|
">=": operator.ge,
|
|
"<": operator.lt,
|
|
"lt": operator.lt,
|
|
"lessthan": operator.lt,
|
|
"<=": operator.le,
|
|
"le": operator.le,
|
|
}
|