test/parallel/test-fs-exists.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const { URL } = require('url');
const f = __filename;

assert.throws(() => fs.exists(f), { code: 'ERR_INVALID_CALLBACK' });
assert.throws(() => fs.exists(), { code: 'ERR_INVALID_CALLBACK' });
assert.throws(() => fs.exists(f, {}), { code: 'ERR_INVALID_CALLBACK' });

fs.exists(f, common.mustCall(function(y) {
  assert.strictEqual(y, true);
}));

fs.exists(`${f}-NO`, common.mustCall(function(y) {
  assert.strictEqual(y, false);
}));

// If the path is invalid, fs.exists will still invoke the callback with false
// instead of throwing errors
fs.exists(new URL('https://foo'), common.mustCall(function(y) {
  assert.strictEqual(y, false);
}));

fs.exists({}, common.mustCall(function(y) {
  assert.strictEqual(y, false);
}));

assert(fs.existsSync(f));
assert(!fs.existsSync(`${f}-NO`));

// fs.existsSync() never throws
assert(!fs.existsSync());
assert(!fs.existsSync({}));
assert(!fs.existsSync(new URL('https://foo')));