Struct TupleUnion

pub struct TupleUnion<T>(/* private fields */);

Similar to Union, but internally uses a tuple to hold the strategies.

This allows better performance than vanilla Union since one does not need to resort to boxing and dynamic dispatch to handle heterogeneous strategies.

The difference between this and TupleUnion is that with this, value trees for variants that aren’t picked at first are generated lazily.

Implementations

impl<T> TupleUnion<T>

pub fn new(tuple: T) -> Self

Wrap tuple in a TupleUnion.

The struct definition allows any T for tuple, but to be useful, it must be a 2- to 10-tuple of (u32, Arc<impl Strategy>) pairs where all strategies ultimately produce the same value. Each u32 indicates the relative weight of its corresponding strategy. You may use WA<S> as an alias for (u32, Arc<S>).

Using this constructor directly is discouraged; prefer to use prop_oneof! since it is generally clearer.

Trait Implementations

impl<T: Clone> Clone for TupleUnion<T>

fn clone(&self) -> TupleUnion<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for TupleUnion<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<A: Strategy, B: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>, F: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>, WA<F>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>, Option<LazyValueTree<F>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>, F: Strategy<Value = A::Value>, G: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>, WA<F>, WA<G>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>, Option<LazyValueTree<F>>, Option<LazyValueTree<G>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>, F: Strategy<Value = A::Value>, G: Strategy<Value = A::Value>, H: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>, WA<F>, WA<G>, WA<H>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>, Option<LazyValueTree<F>>, Option<LazyValueTree<G>>, Option<LazyValueTree<H>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>, F: Strategy<Value = A::Value>, G: Strategy<Value = A::Value>, H: Strategy<Value = A::Value>, I: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>, WA<F>, WA<G>, WA<H>, WA<I>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>, Option<LazyValueTree<F>>, Option<LazyValueTree<G>>, Option<LazyValueTree<H>>, Option<LazyValueTree<I>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<A: Strategy, B: Strategy<Value = A::Value>, C: Strategy<Value = A::Value>, D: Strategy<Value = A::Value>, E: Strategy<Value = A::Value>, F: Strategy<Value = A::Value>, G: Strategy<Value = A::Value>, H: Strategy<Value = A::Value>, I: Strategy<Value = A::Value>, J: Strategy<Value = A::Value>> Strategy for TupleUnion<(WA<A>, WA<B>, WA<C>, WA<D>, WA<E>, WA<F>, WA<G>, WA<H>, WA<I>, WA<J>)>

type Tree = TupleUnionValueTree<(LazyValueTree<A>, Option<LazyValueTree<B>>, Option<LazyValueTree<C>>, Option<LazyValueTree<D>>, Option<LazyValueTree<E>>, Option<LazyValueTree<F>>, Option<LazyValueTree<G>>, Option<LazyValueTree<H>>, Option<LazyValueTree<I>>, Option<LazyValueTree<J>>)>

The value tree generated by this Strategy.

type Value = <A as Strategy>::Value

The type of value used by functions under test generated by this Strategy.

fn new_tree(&self, runner: &mut TestRunner) -> NewTree<Self>

Generate a new value tree from the given runner.

fn prop_map<O: Debug, F: Fn(Self::Value) -> O>(self, fun: F) -> Map<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun.

fn prop_map_into<O: Debug>(self) -> MapInto<Self, O>

where Self: Sized, Self::Value: Into<O>,

Returns a strategy which produces values of type O by transforming Self with Into<O>.

fn prop_perturb<O: Debug, F: Fn(Self::Value, TestRng) -> O>( self, fun: F, ) -> Perturb<Self, F>

where Self: Sized,

Returns a strategy which produces values transformed by the function fun, which is additionally given a random number generator.

fn prop_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> Flatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies.

fn prop_ind_flat_map<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlatten<Map<Self, F>>

where Self: Sized,

Maps values produced by this strategy into new strategies and picks values from those strategies while considering the new strategies to be independent.

fn prop_ind_flat_map2<S: Strategy, F: Fn(Self::Value) -> S>( self, fun: F, ) -> IndFlattenMap<Self, F>

where Self: Sized,

Similar to prop_ind_flat_map(), but produces 2-tuples with the input generated from self in slot 0 and the derived strategy in slot 1.

fn prop_filter<R: Into<Reason>, F: Fn(&Self::Value) -> bool>( self, whence: R, fun: F, ) -> Filter<Self, F>

where Self: Sized,

Returns a strategy which only produces values accepted by fun.

fn prop_filter_map<F: Fn(Self::Value) -> Option<O>, O: Debug>( self, whence: impl Into<Reason>, fun: F, ) -> FilterMap<Self, F>

where Self: Sized,

Returns a strategy which only produces transformed values where fun returns Some(value) and rejects those where fun returns None.

fn prop_union(self, other: Self) -> Union<Self>

where Self: Sized,

Returns a strategy which picks uniformly from self and other.

fn prop_recursive<R: Strategy<Value = Self::Value> + 'static, F: Fn(BoxedStrategy<Self::Value>) -> R>( self, depth: u32, desired_size: u32, expected_branch_size: u32, recurse: F, ) -> Recursive<Self::Value, F>

where Self: Sized + 'static,

Generate a recursive structure with self items as leaves.

fn boxed(self) -> BoxedStrategy<Self::Value>

where Self: Sized + 'static,

Erases the type of this Strategy so it can be passed around as a simple trait object.

fn no_shrink(self) -> NoShrink<Self>

where Self: Sized,

Wraps this strategy to prevent values from being subject to shrinking.

impl<T: Copy> Copy for TupleUnion<T>