nullable

nullable<T>(a, constraints): Dependent<T | null>

It takes an arbitrary and returns a new arbitrary that can generate null values.

Example

random(nullable(integer()))
// => null

random(nullable(integer()))
// => 1234

random(nullable(integer({symbol: Nothing})))
// => Nothing

Type Parameters

• T

Parameters

a

Arbitrary<T>

constraints

MaybePartial<NullableGenerator> = {}

The constraints used to generate arbitrary values.

Returns

Dependent<T | null>

An nullable version of the given arbitrary.