Struct sp_core::offchain::testing::OffchainState

pub struct OffchainState {
    pub requests: BTreeMap<RequestId, PendingRequest>,
    pub persistent_storage: TestPersistentOffchainDB,
    pub local_storage: InMemOffchainStorage,
    pub seed: [u8; 32],
    pub timestamp: Timestamp,
    /* private fields */
}

Internal state of the externalities.

This can be used in tests to respond or assert stuff about interactions.

Fields

requests: BTreeMap<RequestId, PendingRequest>

A list of pending requests.

persistent_storage: TestPersistentOffchainDB

Persistent local storage

local_storage: InMemOffchainStorage

Local storage

seed: [u8; 32]

A supposedly random seed.

timestamp: Timestamp

A timestamp simulating the current time.

Implementations

impl OffchainState

pub fn fulfill_pending_request(
    &mut self,
    id: u16,
    expected: PendingRequest,
    response: impl Into<Vec<u8>>,
    response_headers: impl IntoIterator<Item = (String, String)>
)

Asserts that pending request has been submitted and fills it’s response.

Examples found in repository

src/offchain/testing.rs (line 164)

	fn fulfill_expected(&mut self, id: u16) {
		if let Some(mut req) = self.expected_requests.pop_back() {
			let response = req.response.take().expect("Response checked when added.");
			let headers = std::mem::take(&mut req.response_headers);
			self.fulfill_pending_request(id, req, response, headers);
		}
	}

pub fn expect_request(&mut self, expected: PendingRequest)

Add expected HTTP request.

This method can be used to initialize expected HTTP requests and their responses before running the actual code that utilizes them (for instance before calling into runtime). Expected request has to be fulfilled before this struct is dropped, the response and response_headers fields will be used to return results to the callers. Requests are expected to be performed in the insertion order.

Trait Implementations

impl Debug for OffchainState

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

Formats the value using the given formatter.

impl Default for OffchainState

fn default() -> OffchainState

Returns the “default value” for a type.

impl Drop for OffchainState

fn drop(&mut self)

Executes the destructor for this type.