37 lines
1.2 KiB
TypeScript
37 lines
1.2 KiB
TypeScript
import { describe, expect, it, vi } from "vitest";
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import { wrapFetchWithAbortSignal } from "./fetch.js";
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describe("wrapFetchWithAbortSignal", () => {
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it("converts foreign abort signals to native controllers", async () => {
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let seenSignal: AbortSignal | undefined;
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const fetchImpl = vi.fn(async (_input: RequestInfo | URL, init?: RequestInit) => {
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seenSignal = init?.signal as AbortSignal | undefined;
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return {} as Response;
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});
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const wrapped = wrapFetchWithAbortSignal(fetchImpl);
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let abortHandler: (() => void) | null = null;
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const fakeSignal = {
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aborted: false,
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addEventListener: (event: string, handler: () => void) => {
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if (event === "abort") abortHandler = handler;
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},
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removeEventListener: (event: string, handler: () => void) => {
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if (event === "abort" && abortHandler === handler) abortHandler = null;
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},
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} as AbortSignal;
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const promise = wrapped("https://example.com", { signal: fakeSignal });
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expect(fetchImpl).toHaveBeenCalledOnce();
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expect(seenSignal).toBeInstanceOf(AbortSignal);
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expect(seenSignal).not.toBe(fakeSignal);
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abortHandler?.();
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expect(seenSignal?.aborted).toBe(true);
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await promise;
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});
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});
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