API Reference | fast-check | Property based testing framework
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    Interface OptionConstraints<TNil>

    Constraints to be applied on option

    Since 2.2.0

    interface OptionConstraints<TNil = null> {
        depthIdentifier?: string | DepthIdentifier;
        depthSize?: DepthSize;
        freq?: number;
        maxDepth?: number;
        nil?: TNil;
    }

    Type Parameters

    • TNil = null
    Index

    Properties

    depthIdentifier? depthSize? freq? maxDepth? nil?

    Properties

    depthIdentifier?: string | DepthIdentifier

    Depth identifier can be used to share the current depth between several instances.

    By default, if not specified, each instance of option will have its own depth. In other words: you can have depth=1 in one while you have depth=100 in another one.

    Since 2.14.0

    depthSize?: DepthSize

    While going deeper and deeper within a recursive structure (see letrec), this factor will be used to increase the probability to generate nil.

    Since 2.14.0

    freq?: number

    The probability to build a nil value is of 1 / freq

    5

    Since 1.17.0

    maxDepth?: number

    Maximal authorized depth. Once this depth has been reached only nil will be used.

    Number.POSITIVE_INFINITY — defaulting seen as "max non specified" when defaultSizeToMaxWhenMaxSpecified=true

    Since 2.14.0

    nil?: TNil

    The nil value

    null

    Since 1.17.0

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