Struct TestExternalities 

pub struct TestExternalities<H: Hasher, N: ChangesTrieBlockNumber = u64>
where
    H::Out: Codec + Ord,
{ /* private fields */ }

Simple HashMap-based Externalities impl.

Implementations

impl<H: Hasher, N: ChangesTrieBlockNumber> TestExternalities<H, N>

where H::Out: Ord + 'static + Codec,

pub fn ext(&mut self) -> Ext<'_, H, N, InMemoryBackend<H>>

Get externalities implementation.

pub fn new(storage: Storage) -> Self

Create a new instance of TestExternalities with storage.

pub fn new_empty() -> Self

New empty test externalities.

pub fn new_with_code(code: &[u8], storage: Storage) -> Self

Create a new instance of TestExternalities with code and storage.

pub fn overlayed_changes(&self) -> &OverlayedChanges

Returns the overlayed changes.

pub fn persist_offchain_overlay(&mut self)

Move offchain changes from overlay to the persistent store.

pub fn offchain_db(&self) -> TestPersistentOffchainDB

A shared reference type around the offchain worker storage.

pub fn insert(&mut self, k: StorageKey, v: StorageValue)

Insert key/value into backend

pub fn register_extension<E: Any + Extension>(&mut self, ext: E)

Registers the given extension for this instance.

pub fn changes_trie_storage(&mut self) -> &mut ChangesTrieInMemoryStorage<H, N>

Get mutable reference to changes trie storage.

pub fn commit_all(&mut self) -> Result<(), String>

Commit all pending changes to the underlying backend.

Panic

This will panic if there are still open transactions.

pub fn execute_with<R>(&mut self, execute: impl FnOnce() -> R) -> R

Execute the given closure while self is set as externalities.

Returns the result of the given closure.

pub fn execute_with_safe<R>( &mut self, f: impl FnOnce() -> R + UnwindSafe, ) -> Result<R, String>

Execute the given closure while self is set as externalities.

Returns the result of the given closure, if no panics occured. Otherwise, returns Err.

Trait Implementations

impl<H: Hasher, N: ChangesTrieBlockNumber> Debug for TestExternalities<H, N>

where H::Out: Ord + Codec,

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

Formats the value using the given formatter.

impl<H: Hasher, N: ChangesTrieBlockNumber> Default for TestExternalities<H, N>

where H::Out: Ord + 'static + Codec,

fn default() -> Self

Returns the “default value” for a type.

impl<H, N> ExtensionStore for TestExternalities<H, N>

where H: Hasher, H::Out: Ord + Codec, N: ChangesTrieBlockNumber,

fn extension_by_type_id(&mut self, type_id: TypeId) -> Option<&mut dyn Any>

Tries to find a registered extension by the given type_id and returns it as a &mut dyn Any.

fn register_extension_with_type_id( &mut self, type_id: TypeId, extension: Box<dyn Extension>, ) -> Result<(), Error>

Register extension extension with specified type_id.

fn deregister_extension_by_type_id( &mut self, type_id: TypeId, ) -> Result<(), Error>

Deregister extension with speicifed ‘type_id’ and drop it.

impl<H: Hasher, N: ChangesTrieBlockNumber> From<Storage> for TestExternalities<H, N>

where H::Out: Ord + 'static + Codec,

fn from(storage: Storage) -> Self

Converts to this type from the input type.

impl<H: Hasher, N: ChangesTrieBlockNumber> PartialEq for TestExternalities<H, N>

where H::Out: Ord + 'static + Codec,

fn eq(&self, other: &TestExternalities<H, N>) -> bool

This doesn’t test if they are in the same state, only if they contains the same data at this state

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.