str(ok): {{ '1' is string }}
str(err): {{ 1 is string }}
number(ok): {{ 1 is number }}
number(ok): {{ 1.2 is number }}
number(err): {{ true is number }}
int(ok): {{ 1 is integer }}
int(err): {{ 1.2 is integer }}
float(ok): {{ 1.2 is float }}
float(err): {{ 1 is float }}
array(ok): {{ [] is array }}
array(err): {{ 1 is array }}
map(ok): {{ {} is map }}
map(err): {{ 1 is map }}
odd(ok): {{ 1 is odd }}
odd(err): {{ 2 is odd }}
even(ok): {{ 2 is even }}
even(err): {{ 1 is even }}
divisible_by(ok): {{ 2 is divisible_by(divisor=2) }}
divisible_by(err): {{ 1 is divisible_by(divisor=2) }}
divisible_by(err): {{ 10 is divisible_by(divisor=0) }}
starting_with(ok): {{ 'hello world' is starting_with(pat="hello") }}
starting_with(err): {{ 'hello world' is starting_with(pat="world") }}
ending_with(ok): {{ 'hello world' is ending_with(pat="world") }}
ending_with(err): {{ 'hello world' is ending_with(pat="hello") }}
containing(ok): {{ 'hello world' is containing(pat="ll") }}
containing(ok): {{ [1, 2] is containing(pat=1) }}
containing(ok): {{ {"a": 1} is containing(pat="a") }}
containing(err): {{ 'hello world' is containing(pat="x") }}
defined: {{ data is defined }}
undefined: {{ unknown is undefined }}
iterable: {{ data is iterable }}