Struct StorageNoopGuard 

pub struct StorageNoopGuard<'a> { /* private fields */ }

Asserts that no storage changes took place between con- and destruction of Self.

This is easier than wrapping the whole code-block inside a assert_storage_noop!.

Example

use frame_support::{StorageNoopGuard, storage::unhashed::put};

sp_io::TestExternalities::default().execute_with(|| {
	let _guard = frame_support::StorageNoopGuard::default();
	put(b"key", b"value");
	// Panics since there are storage changes.
});

Implementations

impl<'a> StorageNoopGuard<'a>

pub fn new() -> Self

Alias to default().

pub fn from_error_message(error_message: &'a str) -> Self

Creates a new StorageNoopGuard with a custom error message.

pub fn set_error_message(&mut self, error_message: &'a str)

Sets a custom error message for a StorageNoopGuard.

Trait Implementations

impl<'a> Default for StorageNoopGuard<'a>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Drop for StorageNoopGuard<'a>

fn drop(&mut self)

Executes the destructor for this type.