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test-fs-watch-recursive-update-file.js
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test-fs-watch-recursive-update-file.js
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'use strict';
const common = require('../common');
const { setTimeout } = require('timers/promises');
if (common.isIBMi)
common.skip('IBMi does not support `fs.watch()`');
// fs-watch on folders have limited capability in AIX.
// The testcase makes use of folder watching, and causes
// hang. This behavior is documented. Skip this for AIX.
if (common.isAIX)
common.skip('folder watch capability is limited in AIX.');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
const tmpdir = require('../common/tmpdir');
const testDir = tmpdir.path;
tmpdir.refresh();
(async () => {
// Watch a folder and update an already existing file in it.
const rootDirectory = fs.mkdtempSync(testDir + path.sep);
const testDirectory = path.join(rootDirectory, 'test-0');
fs.mkdirSync(testDirectory);
const testFile = path.join(testDirectory, 'file-1.txt');
fs.writeFileSync(testFile, 'hello');
const watcher = fs.watch(testDirectory, { recursive: true });
let watcherClosed = false;
watcher.on('change', common.mustCallAtLeast(function(event, filename) {
// Libuv inconsistenly emits a rename event for the file we are watching
assert.ok(event === 'change' || event === 'rename');
if (filename === path.basename(testFile)) {
watcher.close();
watcherClosed = true;
}
}));
await setTimeout(common.platformTimeout(100));
fs.writeFileSync(testFile, 'hello');
process.once('exit', function() {
assert(watcherClosed, 'watcher Object was not closed');
});
})().then(common.mustCall());