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# -*- coding: utf-8 -*-
"""Built-in template tests used with the ``is`` operator."""
import decimal
import operator
import re
from ._compat import abc
from ._compat import integer_types
from ._compat import string_types
from ._compat import text_type
from .runtime import Undefined
number_re = re.compile(r"^-?\d+(\.\d+)?$")
regex_type = type(number_re)
test_callable = callable
def test_odd(value):
"""Return true if the variable is odd."""
return value % 2 == 1
def test_even(value):
"""Return true if the variable is even."""
return value % 2 == 0
def test_divisibleby(value, num):
"""Check if a variable is divisible by a number."""
return value % num == 0
def test_defined(value):
"""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):
"""Like :func:`defined` but the other way round."""
return isinstance(value, Undefined)
def test_none(value):
"""Return true if the variable is none."""
return value is None
def test_boolean(value):
"""Return true if the object is a boolean value.
.. versionadded:: 2.11
"""
return value is True or value is False
def test_false(value):
"""Return true if the object is False.
.. versionadded:: 2.11
"""
return value is False
def test_true(value):
"""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):
"""Return true if the object is an integer.
.. versionadded:: 2.11
"""
return isinstance(value, integer_types) and value is not True and value is not False
# NOTE: The existing 'number' test matches booleans and integers
def test_float(value):
"""Return true if the object is a float.
.. versionadded:: 2.11
"""
return isinstance(value, float)
def test_lower(value):
"""Return true if the variable is lowercased."""
return text_type(value).islower()
def test_upper(value):
"""Return true if the variable is uppercased."""
return text_type(value).isupper()
def test_string(value):
"""Return true if the object is a string."""
return isinstance(value, string_types)
def test_mapping(value):
"""Return true if the object is a mapping (dict etc.).
.. versionadded:: 2.6
"""
return isinstance(value, abc.Mapping)
def test_number(value):
"""Return true if the variable is a number."""
return isinstance(value, integer_types + (float, complex, decimal.Decimal))
def test_sequence(value):
"""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, other):
"""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):
"""Check if it's possible to iterate over an object."""
try:
iter(value)
except TypeError:
return False
return True
def test_escaped(value):
"""Check if the value is escaped."""
return hasattr(value, "__html__")
def test_in(value, seq):
"""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,
"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": test_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,
}