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# -*- coding: utf-8 -*- """ jinja2.tests ~~~~~~~~~~~~ Jinja test functions. Used with the "is" operator. :copyright: (c) 2017 by the Jinja Team. :license: BSD, see LICENSE for more details. """ import operator import re from collections import Mapping from jinja2.runtime import Undefined from jinja2._compat import text_type, string_types, integer_types import decimal 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_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, 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: 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, '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, }
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