MockCallHistoryLog

A MockCallHistoryLog is an immutable snapshot of the configuration of a single request that was intercepted by a MockAgent. Each property mirrors a part of the request, with the URL components already parsed by the WHATWG URL parser.

Instances are not created directly. They are produced by a MockCallHistory when call history is enabled on a MockAgent, and can be retrieved through the call history helpers such as firstCall(), lastCall(), nthCall(), calls(), and filterCalls().

import { MockAgent } from 'undici'

const mockAgent = new MockAgent({ enableCallHistory: true })

// after some requests have been intercepted:
const log = mockAgent.getCallHistory()?.firstCall()

Represents the configuration of one intercepted request.

new MockCallHistoryLog(requestInit?): void

Creates a new MockCallHistoryLog. The body, headers, and method properties are copied directly from requestInit, while the URL-derived properties (fullUrl, origin, path, searchParams, protocol, host, port, and hash) are computed from requestInit.path and requestInit.origin using the WHATWG URL parser.

This constructor is internal-facing: instances are created by MockCallHistory when a request is intercepted. It is documented because the class is part of the public API surface.

The body of the intercepted request, exactly as supplied to the dispatcher.

The headers of the intercepted request.

The HTTP method of the intercepted request, for example 'GET' or 'PUT'.

The full URL of the intercepted request, including protocol, host, path, search parameters, and hash.

The origin of the intercepted request, comprising the protocol and host, for example 'https://localhost:4000'.

The pathname of the intercepted request. It always starts with / and never contains search parameters.

The search parameters of the intercepted request as a plain object of key/value pairs.

The protocol of the intercepted request, including the trailing colon, for example 'https:' or 'http:'.

The host of the intercepted request, including the port when present.

The port of the intercepted request. It is an empty string when no explicit port was used, otherwise a string of digits.

The hash fragment of the intercepted request. It is an empty string when absent, otherwise a string starting with #.

mockCallHistoryLog.toMap(): Map

Returns the log as a Map of property name to value.

mockAgent.getCallHistory()?.firstCall()?.toMap().get('hash')
// '#hash'

mockCallHistoryLog.toString(): string

Returns a string built from every property name and value pair. Each pair is joined with -> and pairs are separated with |. Object values such as searchParams and headers are serialized with JSON.stringify().

mockAgent.getCallHistory()?.firstCall()?.toString()
// protocol->https:|host->localhost:4000|port->4000|origin->https://localhost:4000|path->/endpoint|hash->#here|searchParams->{"query":"value"}|fullUrl->https://localhost:4000/endpoint?query=value#here|method->PUT|body->"{ "data": "hello" }"|headers->{"content-type":"application/json"}