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43 lines
1.5 KiB
TypeScript
43 lines
1.5 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import {
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assert,
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assertStringIncludes,
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} from "../../../test_util/std/testing/asserts.ts";
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/** Asserts that an error thrown in a callback will not be wrongly caught. */
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export async function assertCallbackErrorUncaught(
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{ prelude, invocation, cleanup }: {
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/** Any code which needs to run before the actual invocation (notably, any import statements). */
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prelude?: string;
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/**
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* The start of the invocation of the function, e.g. `open("foo.txt", `.
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* The callback will be added after it.
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*/
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invocation: string;
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/** Called after the subprocess is finished but before running the assertions, e.g. to clean up created files. */
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cleanup?: () => Promise<void> | void;
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},
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) {
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// Since the error has to be uncaught, and that will kill the Deno process,
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// the only way to test this is to spawn a subprocess.
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const p = new Deno.Command(Deno.execPath(), {
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args: [
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"eval",
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"--unstable",
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`${prelude ?? ""}
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${invocation}(err) => {
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// If the bug is present and the callback is called again with an error,
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// don't throw another error, so if the subprocess fails we know it had the correct behaviour.
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if (!err) throw new Error("success");
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});`,
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],
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stderr: "piped",
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});
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const { stderr, success } = await p.output();
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const error = new TextDecoder().decode(stderr);
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await cleanup?.();
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assert(!success);
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assertStringIncludes(error, "Error: success");
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}
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