39 lines
1.5 KiB
TypeScript
39 lines
1.5 KiB
TypeScript
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/**
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* Custom Vitest environment that extends jsdom but preserves the native
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* Node.js AbortController and AbortSignal.
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*
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* Problem: jsdom replaces globalThis.AbortController and AbortSignal with its
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* own implementations. Node.js's undici-based fetch validates signals via
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* `signal instanceof AbortSignal` against its own native class reference.
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* jsdom's AbortSignal instances fail this check, causing fetch to throw:
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* TypeError: RequestInit: Expected signal ("AbortSignal {}") to be an
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* instance of AbortSignal.
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*
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* Fix: after jsdom installs its globals, restore the native AbortController
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* and AbortSignal so fetch works correctly in tests.
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*/
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import { builtinEnvironments } from 'vitest/environments';
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const jsdomEnv = builtinEnvironments.jsdom;
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export default {
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name: 'jsdom-native-abort',
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transformMode: 'web' as const,
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async setup(global: typeof globalThis, options: Record<string, unknown>) {
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// Capture native AbortController/AbortSignal BEFORE jsdom patches them
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const NativeAbortController = global.AbortController;
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const NativeAbortSignal = global.AbortSignal;
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// Run standard jsdom setup (installs jsdom globals, including its own AbortController)
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const env = await jsdomEnv.setup(global, options as Parameters<typeof jsdomEnv.setup>[1]);
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// Restore native AbortController so Node.js fetch (undici) accepts the signals
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global.AbortController = NativeAbortController;
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global.AbortSignal = NativeAbortSignal;
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return env;
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},
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};
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