mirror of
https://github.com/denoland/deno.git
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61 lines
2.3 KiB
TypeScript
61 lines
2.3 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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import { assert, assertEquals, assertStringIncludes } from "@std/assert";
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import { exists, existsSync } from "node:fs";
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import { promisify } from "node:util";
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Deno.test("[std/node/fs] exists", async function () {
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const availableFile = await new Promise((resolve) => {
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const tmpFilePath = Deno.makeTempFileSync();
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exists(tmpFilePath, (exists: boolean) => {
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Deno.removeSync(tmpFilePath);
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resolve(exists);
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});
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});
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const notAvailableFile = await new Promise((resolve) => {
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exists("./notAvailable.txt", (exists: boolean) => resolve(exists));
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});
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assertEquals(availableFile, true);
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assertEquals(notAvailableFile, false);
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});
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Deno.test("[std/node/fs] existsSync", function () {
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const tmpFilePath = Deno.makeTempFileSync();
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assertEquals(existsSync(tmpFilePath), true);
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Deno.removeSync(tmpFilePath);
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assertEquals(existsSync("./notAvailable.txt"), false);
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});
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Deno.test("[std/node/fs] promisify(exists)", async () => {
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const tmpFilePath = await Deno.makeTempFile();
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try {
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const existsPromisified = promisify(exists);
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assert(await existsPromisified(tmpFilePath));
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assert(!await existsPromisified("./notAvailable.txt"));
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} finally {
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await Deno.remove(tmpFilePath);
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}
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});
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Deno.test("[std/node/fs] exists callback isn't called twice if error is thrown", async () => {
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// This doesn't use `assertCallbackErrorUncaught()` because `exists()` doesn't return a standard node callback, which is what it expects.
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const tempFile = await Deno.makeTempFile();
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const importUrl = new URL("node:fs", import.meta.url);
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const command = new Deno.Command(Deno.execPath(), {
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args: [
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"eval",
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"--no-check",
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`
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import { exists } from ${JSON.stringify(importUrl)};
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exists(${JSON.stringify(tempFile)}, (exists) => {
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// If the bug is present and the callback is called again with false (meaning an error occurred),
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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 (exists) throw new Error("success");
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});`,
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],
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});
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const { success, stderr } = await command.output();
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await Deno.remove(tempFile);
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assert(!success);
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assertStringIncludes(new TextDecoder().decode(stderr), "Error: success");
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});
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