testing/transports/fetch_transport.ts

Cookie-threading HTTP transport for cross-process tests.

Wraps the global fetch against a base URL, carries cookies across requests in a Map-backed jar so the session cookie set on bootstrap is re-sent on every subsequent call. Satisfies the RpcTestTransport shape Hono.request already does — so every suite body that takes transport: RpcTestTransport works against a cross-process binary unchanged.

The Origin header is threaded onto every request because the backend's allowlist ({ZZZ,ZAP,FUZ}_ALLOWED_ORIGINS) rejects mutations without an Origin. Cross-process tests run with ALLOWED_ORIGINS=http://localhost:*, so defaulting origin to the configured base_url is safe.

The cookie jar is intentionally simple — it does not honour Domain, Path, Expires, or SameSite attributes. Cross-process tests always hit a single host:port, so name-keyed last-write-wins matches the behaviour real browsers exhibit against the same surface.

Declarations
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3 declarations

view source

create_fetch_transport
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testing/transports/fetch_transport.ts view source

(options: FetchTransportOptions): FetchTransport

Build a cookie-threading transport pinned to options.base_url. The returned function carries a private Map<name, cookie-head> jar that updates on every response's Set-Cookie and re-sends on every subsequent request.

Request rewriting:

- Absolute URLs (http://other.example/...) pass through verbatim — handy for cross-origin negative tests that target a deliberately different host. - Relative URLs are resolved against base_url. - Origin is set to options.origin ?? base_url unless the caller already provided one. - Cookie is set from the jar unless the caller already provided one.

options

type FetchTransportOptions

returns

FetchTransport

FetchTransport
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testing/transports/fetch_transport.ts view source

FetchTransport

The transport shape: callable as RpcTestTransport plus a cookies() accessor that returns the current jar state. The accessor exists so ws_transport can thread the session cookie onto the WS upgrade without an HTTP round trip.

inheritance

cookies

Snapshot of every cookie currently in the jar, formatted as full Set-Cookie values (name=value). Used by ws_transport to compose the Cookie header on the upgrade request.

type () => ReadonlyArray<string>
readonly

FetchTransportOptions
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testing/transports/fetch_transport.ts view source

FetchTransportOptions

Construction options for create_fetch_transport.

base_url

Base URL the binary is reachable at — e.g. http://localhost:8788.

type string
readonly

initial_cookies

Initial cookie values to seed the jar. Pass the Set-Cookie values captured from a prior bootstrap() call to keep the keeper session across a transport-recreation boundary. Each entry is a full Set-Cookie value (the same string Headers.getSetCookie() returns).

type ReadonlyArray<string>
readonly

origin

Origin header threaded onto every request when the caller hasn't set one. Defaults to base_url; backends running with ALLOWED_ORIGINS=http://localhost:* accept http://localhost:<port> matching the spawned binary.

Pass null to disable the default — useful for bearer-only probes that must not look like browser-context requests (the auth middleware silently discards bearer credentials when Origin/Referer is present). Callers can still set Origin per-call via init.headers.

type string | null
readonly

Depends on
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Imported by
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