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// Flags: --experimental-modules
import '../common';
import assert from 'assert';
import fs, { readFile, readFileSync } from 'fs';
import events, { defaultMaxListeners } from 'events';
import util from 'util';
const readFileDescriptor = Reflect.getOwnPropertyDescriptor(fs, 'readFile');
const readFileSyncDescriptor =
Reflect.getOwnPropertyDescriptor(fs, 'readFileSync');
const s = Symbol();
const fn = () => s;
Reflect.deleteProperty(fs, 'readFile');
assert.deepStrictEqual([fs.readFile, readFile], [undefined, undefined]);
fs.readFile = fn;
assert.deepStrictEqual([fs.readFile(), readFile()], [s, s]);
Reflect.defineProperty(fs, 'readFile', {
value: fn,
configurable: true,
writable: true,
});
assert.deepStrictEqual([fs.readFile(), readFile()], [s, s]);
Reflect.deleteProperty(fs, 'readFile');
assert.deepStrictEqual([fs.readFile, readFile], [undefined, undefined]);
let count = 0;
Reflect.defineProperty(fs, 'readFile', {
get() { return count; },
configurable: true,
});
count++;
assert.deepStrictEqual([readFile, fs.readFile, readFile], [0, 1, 1]);
let otherValue;
Reflect.defineProperty(fs, 'readFile', { // eslint-disable-line accessor-pairs
set(value) {
Reflect.deleteProperty(fs, 'readFile');
otherValue = value;
},
configurable: true,
});
Reflect.defineProperty(fs, 'readFileSync', {
get() {
return otherValue;
},
configurable: true,
});
fs.readFile = 2;
assert.deepStrictEqual([readFile, readFileSync], [undefined, 2]);
Reflect.defineProperty(fs, 'readFile', readFileDescriptor);
Reflect.defineProperty(fs, 'readFileSync', readFileSyncDescriptor);
const originDefaultMaxListeners = events.defaultMaxListeners;
const utilProto = util.__proto__; // eslint-disable-line no-proto
count = 0;
Reflect.defineProperty(Function.prototype, 'defaultMaxListeners', {
configurable: true,
enumerable: true,
get: function() { return ++count; },
set: function(v) {
Reflect.defineProperty(this, 'defaultMaxListeners', {
configurable: true,
enumerable: true,
writable: true,
value: v,
});
},
});
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners);
assert.strictEqual(events.defaultMaxListeners, originDefaultMaxListeners);
assert.strictEqual(++events.defaultMaxListeners,
originDefaultMaxListeners + 1);
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners + 1);
assert.strictEqual(Function.prototype.defaultMaxListeners, 1);
Function.prototype.defaultMaxListeners = 'foo';
assert.strictEqual(Function.prototype.defaultMaxListeners, 'foo');
assert.strictEqual(events.defaultMaxListeners, originDefaultMaxListeners + 1);
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners + 1);
count = 0;
const p = {
get foo() { return ++count; },
set foo(v) {
Reflect.defineProperty(this, 'foo', {
configurable: true,
enumerable: true,
writable: true,
value: v,
});
},
};
util.__proto__ = p; // eslint-disable-line no-proto
assert.strictEqual(util.foo, 1);
util.foo = 'bar';
assert.strictEqual(count, 1);
assert.strictEqual(util.foo, 'bar');
assert.strictEqual(p.foo, 2);
p.foo = 'foo';
assert.strictEqual(p.foo, 'foo');
events.defaultMaxListeners = originDefaultMaxListeners;
util.__proto__ = utilProto; // eslint-disable-line no-proto
Reflect.deleteProperty(util, 'foo');
Reflect.deleteProperty(Function.prototype, 'defaultMaxListeners');
assert.throws(
() => Object.defineProperty(events, 'defaultMaxListeners', { value: 3 }),
/TypeError: Cannot redefine/
);
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