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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import {
assertEquals,
assertNotEquals,
fail,
} from "../../../../test_util/std/assert/mod.ts";
import { assertCallbackErrorUncaught } from "../_test_utils.ts";
import { readdir, readdirSync } from "node:fs";
import { join } from "../../../../test_util/std/path/mod.ts";
Deno.test({
name: "ASYNC: reading empty directory",
async fn() {
const dir = Deno.makeTempDirSync();
await new Promise<string[]>((resolve, reject) => {
readdir(dir, (err, files) => {
if (err) reject(err);
resolve(files);
});
})
.then((files) => assertEquals(files, []), () => fail())
.finally(() => Deno.removeSync(dir));
},
});
function assertEqualsArrayAnyOrder<T>(actual: T[], expected: T[]) {
assertEquals(actual.length, expected.length);
for (const item of expected) {
const index = actual.indexOf(item);
assertNotEquals(index, -1);
expected = expected.splice(index, 1);
}
}
Deno.test({
name: "ASYNC: reading non-empty directory",
async fn() {
const dir = Deno.makeTempDirSync();
Deno.writeTextFileSync(join(dir, "file1.txt"), "hi");
Deno.writeTextFileSync(join(dir, "file2.txt"), "hi");
Deno.mkdirSync(join(dir, "some_dir"));
await new Promise<string[]>((resolve, reject) => {
readdir(dir, (err, files) => {
if (err) reject(err);
resolve(files);
});
})
.then(
(files) =>
assertEqualsArrayAnyOrder(
files,
["file1.txt", "some_dir", "file2.txt"],
),
() => fail(),
)
.finally(() => Deno.removeSync(dir, { recursive: true }));
},
});
Deno.test({
name: "SYNC: reading empty the directory",
fn() {
const dir = Deno.makeTempDirSync();
assertEquals(readdirSync(dir), []);
},
});
Deno.test({
name: "SYNC: reading non-empty directory",
fn() {
const dir = Deno.makeTempDirSync();
Deno.writeTextFileSync(join(dir, "file1.txt"), "hi");
Deno.writeTextFileSync(join(dir, "file2.txt"), "hi");
Deno.mkdirSync(join(dir, "some_dir"));
assertEqualsArrayAnyOrder(
readdirSync(dir),
["file1.txt", "some_dir", "file2.txt"],
);
},
});
Deno.test("[std/node/fs] readdir callback isn't called twice if error is thrown", async () => {
// The correct behaviour is not to catch any errors thrown,
// but that means there'll be an uncaught error and the test will fail.
// So the only way to test this is to spawn a subprocess, and succeed if it has a non-zero exit code.
// (assertRejects won't work because there's no way to catch the error.)
const tempDir = await Deno.makeTempDir();
const importUrl = new URL("node:fs", import.meta.url);
await assertCallbackErrorUncaught({
prelude: `import { readdir } from ${JSON.stringify(importUrl)}`,
invocation: `readdir(${JSON.stringify(tempDir)}, `,
async cleanup() {
await Deno.remove(tempDir);
},
});
});
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