Module proptest::strategy

Defines the core traits used by Proptest.

Modules

statics

Modified versions of the normal strategy combinators which take specialised traits instead of normal functions.

Structs

BoxedStrategy	A boxed Strategy trait object as produced by Strategy::boxed().
CheckStrategySanityOptions	Options passed to check_strategy_sanity().
Filter	Strategy and ValueTree filter adaptor.
FilterMap	Strategy and ValueTree filter_map adaptor.
FilterMapValueTree	ValueTree corresponding to FilterMap.
Flatten	Adaptor that flattens a Strategy which produces other Strategys into a Strategy that picks one of those strategies and then picks values from it.
FlattenValueTree	The ValueTree produced by Flatten.
Fuse	Adaptor for Strategy and ValueTree which guards simplify() and complicate() to avoid contract violations.
IndFlatten	Similar to Flatten, but does not shrink the input strategy.
IndFlattenMap	Similar to Map plus Flatten, but does not shrink the input strategy and passes the original input through.
Just	A Strategy which always produces a single value value and never simplifies.
LazyJust	A Strategy which always produces a single value value and never simplifies. If T is Clone, you should use Just instead.
Map	Strategy and ValueTree map adaptor.
MapInto	Strategy and ValueTree map into adaptor.
NoShrink	Wraps a Strategy or ValueTree to suppress shrinking of generated values.
Perturb	Strategy perturbation adaptor.
PerturbValueTree	ValueTree perturbation adaptor.
Recursive	Return type from Strategy::prop_recursive().
SBoxedStrategy	A boxed Strategy trait object which is also Sync and Send, as produced by Strategy::sboxed().
Shuffle	Strategy shuffle adaptor.
ShuffleValueTree	ValueTree shuffling adaptor.
TupleUnion	Similar to Union, but internally uses a tuple to hold the strategies.
TupleUnionValueTree	ValueTree type produced by TupleUnion.
Union	A Strategy which picks from one of several delegate Stragegys.
UnionValueTree	ValueTree corresponding to Union.

Traits

Shuffleable	A value which can be used with the prop_shuffle combinator.
Strategy	A strategy for producing arbitrary values of a given type.
ValueTree	A generated value and its associated shrinker.

Functions

check_strategy_sanity	Run some tests on the given Strategy to ensure that it upholds the simplify/complicate contracts.
float_to_weight	Convert a floating-point weight in the range (0.0,1.0) to a pair of weights that can be used with Union and similar.

Type Definitions

LazyJustFn	Shorthand for LazyJust<T, fn () -> T>.
NewTree	A new ValueTree from a Strategy when Ok or otherwise Err when a new value-tree can not be produced for some reason such as in the case of filtering with a predicate which always returns false. You should pass in your strategy as the type parameter.
ValueFor	[ Deprecated ] The value that functions under test use for a particular Strategy.
W	A relative weight of a particular Strategy corresponding to T coupled with T itself. The weight is currently given in u32.