Struct snarkvm_console_network::prelude::TestRng

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pub struct TestRng(_);

Expand description

A fast RNG used solely for testing and benchmarking, not for any real world purposes.

Implementations

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impl TestRng

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pub fn fixed(seed: u64) -> TestRng

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pub fn next_string(&mut self, max_bytes: u32, is_fixed_size: bool) -> String

Returns a randomly-sampled String, given the maximum size in bytes and an RNG.

Some of the snarkVM internal tests involve the random generation of strings, which are parsed and tested against the original ones. However, since the string parser rejects certain characters, if those characters are randomly generated, the tests fail.

To prevent these failures, as we randomly generate the characters, we ensure that they are not among the ones rejected by the parser; if they are, we adjust them to be allowed characters.

Note that the randomness of the characters is strictly for testing purposes; also note that the disallowed characters are a small fraction of the total set of characters, and thus the adjustments rarely occur.

Trait Implementations

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impl Default for TestRng

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fn default() -> TestRng

Returns the “default value” for a type. Read more

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impl RngCore for TestRng

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fn next_u32(&mut self) -> u32

Return the next random u32. Read more

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fn next_u64(&mut self) -> u64

Return the next random u64. Read more

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fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data. Read more

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fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data. Read more

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impl CryptoRng for TestRng

Auto Trait Implementations

impl RefUnwindSafe for TestRng

impl Send for TestRng

impl Sync for TestRng

impl Unpin for TestRng

impl UnwindSafe for TestRng

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> CryptoRngCore for Twhere
T: CryptoRng + RngCore,

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fn as_rngcore(&mut self) -> &mut dyn RngCore ⓘ

Upcast to an RngCore trait object.

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for Twhere
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> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<R> Rng for Rwhere
R: RngCore + ?Sized,

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fn gen<T>(&mut self) -> Twhere
Standard: Distribution<T>,

Return a random value supporting the Standard distribution. Read more

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fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,

Generate a random value in the given range. Read more

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fn sample<T, D>(&mut self, distr: D) -> Twhere
D: Distribution<T>,

Sample a new value, using the given distribution. Read more

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fn sample_iter<T, D>(self, distr: D) -> DistIter<D, Self, T>where
D: Distribution<T>,
Self: Sized,

Create an iterator that generates values using the given distribution. Read more

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fn fill<T>(&mut self, dest: &mut T)where
T: Fill + ?Sized,

Fill any type implementing Fill with random data Read more

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fn try_fill<T>(&mut self, dest: &mut T) -> Result<(), Error>where
T: Fill + ?Sized,

Fill any type implementing Fill with random data Read more

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fn gen_bool(&mut self, p: f64) -> bool

Return a bool with a probability p of being true. Read more

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fn gen_ratio(&mut self, numerator: u32, denominator: u32) -> bool

Return a bool with a probability of numerator/denominator of being true. I.e. gen_ratio(2, 3) has chance of 2 in 3, or about 67%, of returning true. If numerator == denominator, then the returned value is guaranteed to be true. If numerator == 0, then the returned value is guaranteed to be false. Read more

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impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T, U> TryFrom for Twhere
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>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Struct snarkvm_console_network::prelude::TestRng

Implementations

impl TestRng

pub fn fixed(seed: u64) -> TestRng

pub fn next_string(&mut self, max_bytes: u32, is_fixed_size: bool) -> String

Trait Implementations

impl Default for TestRng

fn default() -> TestRng

impl RngCore for TestRng

fn next_u32(&mut self) -> u32

fn next_u64(&mut self) -> u64

fn fill_bytes(&mut self, dest: &mut [u8])

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

impl CryptoRng for TestRng

Auto Trait Implementations

impl RefUnwindSafe for TestRng

impl Send for TestRng

impl Sync for TestRng

impl Unpin for TestRng

impl UnwindSafe for TestRng

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> CryptoRngCore for Twhere T: CryptoRng + RngCore,

fn as_rngcore(&mut self) -> &mut dyn RngCore ⓘ

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<R> Rng for Rwhere R: RngCore + ?Sized,

fn gen<T>(&mut self) -> Twhere Standard: Distribution<T>,

fn gen_range<T, R>(&mut self, range: R) -> Twhere T: SampleUniform, R: SampleRange<T>,

fn sample<T, D>(&mut self, distr: D) -> Twhere D: Distribution<T>,

fn sample_iter<T, D>(self, distr: D) -> DistIter<D, Self, T>where D: Distribution<T>, Self: Sized,

fn fill<T>(&mut self, dest: &mut T)where T: Fill + ?Sized,

fn try_fill<T>(&mut self, dest: &mut T) -> Result<(), Error>where T: Fill + ?Sized,

fn gen_bool(&mut self, p: f64) -> bool

fn gen_ratio(&mut self, numerator: u32, denominator: u32) -> bool

impl<T> Same<T> for T

type Output = T

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

type Error = Infallible

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

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

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

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

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

fn vzip(self) -> V

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

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

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

impl<T> CryptoRngCore for Twhere
T: CryptoRng + RngCore,

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

impl<R> Rng for Rwhere
R: RngCore + ?Sized,

fn gen<T>(&mut self) -> Twhere
Standard: Distribution<T>,

fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,

fn sample<T, D>(&mut self, distr: D) -> Twhere
D: Distribution<T>,

fn sample_iter<T, D>(self, distr: D) -> DistIter<D, Self, T>where
D: Distribution<T>,
Self: Sized,

fn fill<T>(&mut self, dest: &mut T)where
T: Fill + ?Sized,

fn try_fill<T>(&mut self, dest: &mut T) -> Result<(), Error>where
T: Fill + ?Sized,

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

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

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