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tests.py
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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, }