Files
deepseek-harness/packages/host/runtime/tests/web-plugins.spec.ts
T

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/**
* mountWebPlugins unit coverage (keyless; the real nine-package walk is the
* built-artifact e2e). The Loader-facing behavior — baseUrl anchoring, entry
* creation with idempotent reuse, the fiber-less fail-loud sweep, and the
* resolver seam — is exercised against a stubbed loader service so it runs
* without built lib/ artifacts.
*/
import { Context } from 'cordis'
import { afterEach, describe, expect, it } from 'vitest'
import { WEB_UI_PLUGINS, mountWebPlugins } from '../src/web-plugins.ts'
interface FakeEntry {
options: { name: string }
fiber?: unknown
disabled: boolean
}
/** Loader stub provided under the real service name (mountWebPlugins skips ctx.plugin(Loader) when present). */
class FakeLoader {
readonly created: string[] = []
awaited = 0
constructor(private readonly entriesList: FakeEntry[], private readonly onCreate?: (name: string) => void) {}
entries(): Iterable<FakeEntry> {
return this.entriesList
}
async create(options: { name: string }): Promise<void> {
this.created.push(options.name)
this.onCreate?.(options.name)
}
async await(): Promise<void> {
this.awaited += 1
}
}
let root: Context | undefined
afterEach(async () => {
await root?.fiber.dispose()
root = undefined
})
function withLoader(entriesList: FakeEntry[], onCreate?: (name: string) => void): { ctx: Context; loader: FakeLoader } {
root = new Context()
const loader = new FakeLoader(entriesList, onCreate)
root.reflect.provide('loader', loader)
return { ctx: root, loader }
}
describe('mountWebPlugins (stubbed loader)', () => {
it('creates one entry per UI plugin, awaits the tree, and returns the loader view + resolver', async () => {
const entriesList: FakeEntry[] = []
const { ctx, loader } = withLoader(entriesList, (name) => {
entriesList.push({ options: { name }, fiber: {}, disabled: false })
})
const mounted = await mountWebPlugins(ctx)
expect(loader.created).toEqual([...WEB_UI_PLUGINS])
expect(loader.awaited).toBe(1)
expect([...mounted.loader.entries()].map(e => e.options.name)).toEqual([...WEB_UI_PLUGINS])
// The resolver resolves this package's own manifest through real module resolution.
expect(mounted.resolvePkgJson('@deepseek-ai/dsh-host-runtime')).toMatch(/package\.json$/)
expect(ctx.baseUrl).toBeDefined()
})
it('reuses existing entries (idempotent mount creates no duplicates)', async () => {
const preexisting: FakeEntry[] = WEB_UI_PLUGINS.map(name => ({ options: { name }, fiber: {}, disabled: false }))
const { ctx, loader } = withLoader(preexisting)
await mountWebPlugins(ctx)
expect(loader.created).toEqual([])
})
it('throws listing every fiber-less entry (silent import failure must not drop a UI plugin)', async () => {
const entriesList: FakeEntry[] = []
const { ctx } = withLoader(entriesList, (name) => {
// First two load; the rest stay fiber-less (import failed silently).
entriesList.push({ options: { name }, fiber: entriesList.length < 2 ? {} : undefined, disabled: false })
})
await expect(mountWebPlugins(ctx)).rejects.toThrow(/UI plugin\(s\) failed to load: .*dsh-client-ui-theme/)
})
it('skips disabled entries in the fail-loud sweep (disabled is the one valid fiber-less state)', async () => {
const entriesList: FakeEntry[] = WEB_UI_PLUGINS.map(name => ({ options: { name }, fiber: undefined, disabled: true }))
const { ctx } = withLoader(entriesList)
await expect(mountWebPlugins(ctx)).resolves.toBeDefined()
})
it('mounts the real Loader when none is present (the ctx.plugin(Loader) branch)', async () => {
root = new Context()
// Environment-dependent outcome: with built lib/ the nine imports load
// and the mount resolves; without them every entry stays fiber-less and
// the sweep throws its loud list. Either way the branch under test is the
// Loader auto-mount. Manual try/catch keeps cordis-traced proxies out of
// expect()'s formatting path (pretty-format probes throw on them).
// Plain string: the success sentinel and error text share one channel.
let outcome: string
try {
await mountWebPlugins(root)
outcome = 'resolved'
} catch (error) {
outcome = error instanceof Error ? error.message : String(error)
}
expect(outcome === 'resolved' || /UI plugin\(s\) failed to load/.test(outcome)).toBe(true)
expect(root.get('loader') !== undefined).toBe(true)
}, 30_000) // built-env run imports nine real plugin packages through the Loader
it('keeps a caller-set baseUrl (anchors only when absent)', async () => {
const entriesList: FakeEntry[] = []
const { ctx } = withLoader(entriesList, (name) => {
entriesList.push({ options: { name }, fiber: {}, disabled: false })
})
ctx.baseUrl = 'file:///caller/anchor/'
await mountWebPlugins(ctx)
expect(ctx.baseUrl).toBe('file:///caller/anchor/')
})
})