Struct fixt::Unpredictable

source · [−]

pub struct Unpredictable;

Expand description

represents an unpredictable curve

unpredictable curves seek to:

disrupt ‘just so’ implementations of algorithms that lean too heavily on fragile assumptions
have a high probability of generating common edge cases that developers fail to cover a classic example is broken/forgotten NaN handling in code that uses floats for calculations

in general this is what we want from our tests, to remind us of where we are wrong about our assumptions in our code. it is likely that you want to use the Unpredictable curve as the defacto choice for testing.

however, note that unpredictable curves are NOT intended:

to comprehensively cover any particular value space
to replace property/fuzz testing
to algorithmically explore edge-cases in an automated fashion
to assert any particular security or correctness concern

unpredictable curves are a great way to knock off some low hanging fruit, especially around numeric calculations and utf-8 handling, but are no replacement for stringent approaches.

Trait Implementations

impl Clone for Unpredictable

fn clone(&self) -> Unpredictable

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Copy for Unpredictable

Auto Trait Implementations

impl RefUnwindSafe for Unpredictable

impl Send for Unpredictable

impl Sync for Unpredictable

impl Unpin for Unpredictable

impl UnwindSafe for Unpredictable

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V