import * as fsp from 'node:fs/promises';
import * as path from 'node:path';
import assert from 'node:assert/strict';
import { describe, it } from 'node:test';
import { atomicWriteFile } from '../../../lib/fs-helpers.js';
import { withFileOpsFixture } from '../fixtures/file-ops-hooks.js';
void describe('atomicWriteFile', () => {
withFileOpsFixture((getTestDir) => {
void it('writes file content atomically', async () => {
const filePath = path.join(getTestDir(), 'atomic.txt');
const content = 'Atomic Content';
await atomicWriteFile(filePath, content);
const readBack = await fsp.readFile(filePath, 'utf-8');
assert.strictEqual(readBack, content);
});
void it('overwrites existing file', async () => {
const filePath = path.join(getTestDir(), 'overwrite.txt');
await fsp.writeFile(filePath, 'Initial');
await atomicWriteFile(filePath, 'Updated');
const readBack = await fsp.readFile(filePath, 'utf-8');
assert.strictEqual(readBack, 'Updated');
});
void it('cleans up temp file on abort', async () => {
const filePath = path.join(getTestDir(), 'aborted.txt');
const controller = new AbortController();
const signal = controller.signal;
controller.abort();
await assert.rejects(
atomicWriteFile(filePath, 'Should not write', { signal }),
/AbortError/
);
// Verify no temp files left (simple check for files starting with abolished.txt.)
const files = await fsp.readdir(getTestDir());
const tempFiles = files.filter((f) => f.startsWith('aborted.txt.'));
assert.strictEqual(tempFiles.length, 0);
});
});
});
