56 lines
2.2 KiB
TypeScript
56 lines
2.2 KiB
TypeScript
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/** Test-owned Remote face: `$on` subscriptions driven by the internal forwarded-event plumbing. */
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import type { Context } from '@deepseek-ai/cordis'
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/**
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* Remote service test double for the forwarded-event path. Feature specs need
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* `ctx.remote.$on` to exist (their plugins inject `remote`) and need forwarded
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* host events to reach those subscribers, but not the generated namespaces or
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* the wire — so this double implements subscription and dispatch only.
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*
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* Dispatch is driven the same way production drives it: by the internal
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* `remote/host-event` event the connection sink emits. A spec therefore
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* exercises its refresh chains with `ctx.emit('remote/host-event', name, args)`,
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* the exact signal `client/runtime` republishes from a `host/remote-event`
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* frame, rather than reaching into this double.
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*
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* `$mount` rejects: a spec that reaches a generated namespace through this
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* double has outgrown it and needs the real Client Remote service.
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*/
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export class TestRemote {
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private readonly subscriptions = new Map<string, Set<(...args: never[]) => void>>()
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/**
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* Register the double as `ctx.remote` and bind its dispatch to the plumbing event.
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* @param ctx - the spec's root Context.
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*/
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constructor(ctx: Context) {
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ctx.provide('remote', this)
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ctx.on('remote/host-event', (event, args) => {
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const listeners = this.subscriptions.get(event)
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if (listeners === undefined) return
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for (const listener of [...listeners]) listener(...args as never[])
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})
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}
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/**
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* Subscribe to one forwarded host event.
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* @param event - forwarded host event name.
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* @param listener - receives the Host argument list verbatim.
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* @returns disposer removing this subscription.
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*/
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$on(event: string, listener: (...args: never[]) => void): () => void {
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const listeners = this.subscriptions.get(event) ?? new Set()
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this.subscriptions.set(event, listeners)
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listeners.add(listener)
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return () => { listeners.delete(listener) }
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}
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/**
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* Generated-namespace mount, unsupported by this double.
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* @returns never; always rejects.
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*/
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$mount(): Promise<() => Promise<void>> {
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return Promise.reject(new Error('TestRemote: $mount needs the real Client Remote service'))
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}
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}
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