module Crinja::Test
Overview
Beside filters, there are also so-called “tests” available.
Tests can be used to test a variable against a common expression. To test a variable or expression,
you add is plus the name of the test after the variable. For example, to find out if a variable
is defined, you can do name is defined, which will then return true or false depending on
whether name is defined in the current template context.
Tests can accept arguments, too. If the test only takes one argument, you can leave out the parentheses. For example, the following two expressions do the same thing:
{% if loop.index is divisibleby 3 %}
{% if loop.index is divisibleby(3) %}Builtin Tests
The following tests are available in the default library:
**[callable](http://jinja.pocoo.org/docs/2.9/templates/#callable)**(<em></em>)**[defined](http://jinja.pocoo.org/docs/2.9/templates/#defined)**(<em></em>)**[divisibleby](http://jinja.pocoo.org/docs/2.9/templates/#divisibleby)**(<em>num</em>)**[equalto](http://jinja.pocoo.org/docs/2.9/templates/#equalto)**(<em>other</em>)**[escaped](http://jinja.pocoo.org/docs/2.9/templates/#escaped)**(<em></em>)**[even](http://jinja.pocoo.org/docs/2.9/templates/#even)**(<em></em>)**[greaterthan](http://jinja.pocoo.org/docs/2.9/templates/#greaterthan)**(<em>other=0</em>)**[in](http://jinja.pocoo.org/docs/2.9/templates/#in)**(<em>seq=[]</em>)**[iterable](http://jinja.pocoo.org/docs/2.9/templates/#iterable)**(<em></em>)**[lessthan](http://jinja.pocoo.org/docs/2.9/templates/#lessthan)**(<em>other=0</em>)**[lower](http://jinja.pocoo.org/docs/2.9/templates/#lower)**(<em></em>)**[mapping](http://jinja.pocoo.org/docs/2.9/templates/#mapping)**(<em></em>)**[nil](http://jinja.pocoo.org/docs/2.9/templates/#nil)**(<em></em>)**[none](http://jinja.pocoo.org/docs/2.9/templates/#none)**(<em></em>)**[number](http://jinja.pocoo.org/docs/2.9/templates/#number)**(<em></em>)**[odd](http://jinja.pocoo.org/docs/2.9/templates/#odd)**(<em></em>)**[sameas](http://jinja.pocoo.org/docs/2.9/templates/#sameas)**(<em>other</em>)**[sequence](http://jinja.pocoo.org/docs/2.9/templates/#sequence)**(<em></em>)**[string](http://jinja.pocoo.org/docs/2.9/templates/#string)**(<em></em>)**[undefined](http://jinja.pocoo.org/docs/2.9/templates/#undefined)**(<em></em>)**[upper](http://jinja.pocoo.org/docs/2.9/templates/#upper)**(<em></em>)