Struct proptest::strategy::Singleton
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pub struct Singleton<T: Clone + Debug>(pub T);
A Strategy
which always produces the same value and never simplifies.
Trait Implementations
impl<T: Clone + Clone + Debug> Clone for Singleton<T>
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fn clone(&self) -> Singleton<T>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more
impl<T: Copy + Clone + Debug> Copy for Singleton<T>
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impl<T: Debug + Clone + Debug> Debug for Singleton<T>
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impl<T: Clone + Debug> Strategy for Singleton<T>
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type Value = Self
The value tree generated by this Strategy
. Read more
fn new_value(&self, _: &mut TestRunner) -> Result<Self::Value, String>
Generate a new value tree from the given runner. Read more
fn prop_map<O: Debug, F: Fn(<Self::Value as ValueTree>::Value) -> O>(
self,
fun: F
) -> Map<Self, F> where
Self: Sized,
self,
fun: F
) -> Map<Self, F> where
Self: Sized,
Returns a strategy which produces values transformed by the function fun
. Read more
fn prop_filter<F: Fn(&<Self::Value as ValueTree>::Value) -> bool>(
self,
whence: String,
fun: F
) -> Filter<Self, F> where
Self: Sized,
self,
whence: String,
fun: F
) -> Filter<Self, F> where
Self: Sized,
Returns a strategy which only produces values accepted by fun
. Read more
fn prop_union(self, other: Self) -> Union<Self> where
Self: Sized,
Self: Sized,
Returns a strategy which picks uniformly from self
and other
. Read more
fn boxed(self) -> BoxedStrategy<<Self::Value as ValueTree>::Value> where
Self: Sized + 'static,
Self: Sized + 'static,
Erases the type of this Strategy
so it can be passed around as a simple trait object. Read more
fn no_shrink(self) -> NoShrink<Self> where
Self: Sized,
Self: Sized,
Wraps this strategy to prevent values from being subject to shrinking. Read more
impl<T: Clone + Debug> ValueTree for Singleton<T>
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type Value = T
The type of the value produced by this ValueTree
.
fn current(&self) -> T
Returns the current value.
fn simplify(&mut self) -> bool
Attempts to simplify the current value. Notionally, this sets the "high" value to the current value, and the current value to a "halfway point" between high and low, rounding towards low. Read more
fn complicate(&mut self) -> bool
Attempts to partially undo the last simplification. Notionally, this sets the "low" value to one plus the current value, and the current value to a "halfway point" between high and the new low, rounding towards low. Read more