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mockResolvePlugin.ts
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mockResolvePlugin.ts
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import { ResolvePluginInstance } from 'webpack'
import never from 'never'
import { promisify } from 'util'
import { isAbsolute, join } from 'path'
const rootDir = join(__dirname, 'lib')
const mockResolvePlugin: ResolvePluginInstance = {
apply: resolver => {
resolver.hooks.resolve.tapPromise('Mock', async (request, resolveContext) => {
const path = request.request ?? never()
if (isAbsolute(path)) return undefined
if (path.startsWith('.')) return undefined
const mockPath = join(rootDir, '__mocks__', path)
const resolvedPath = await (async () => {
let resolvedPath: string
try {
resolvedPath = await promisify(resolver.resolve).call(
resolver,
{},
request.path as string,
mockPath,
resolveContext) as string
} catch (e) {
return
}
return resolvedPath
})()
if (resolvedPath !== undefined) {
return await (promisify(resolver.doResolve) as (...params: any[]) => Promise<any>).call(
resolver,
resolver.hooks.resolve,
{
...request,
request: mockPath
},
undefined,
resolveContext)
}
})
}
}
export default mockResolvePlugin