import * as fs from 'node:fs/promises';
import * as path from 'node:path';
import assert from 'node:assert/strict';
import { describe, it } from 'node:test';
import { headFile } from '../../../lib/fs-helpers.js';
import { withFileOpsFixture } from '../fixtures/file-ops-hooks.js';
void describe('headFile', () => {
withFileOpsFixture((getTestDir) => {
void it('headFile returns first N lines', async () => {
const filePath = path.join(getTestDir(), 'multiline.txt');
const handle = await fs.open(filePath, 'r');
try {
const content = await headFile(handle, 5);
const lines = content.split('\n');
assert.strictEqual(lines[0], 'Line 1');
assert.ok(lines.length <= 5);
} finally {
await handle.close();
}
});
});
});
