daohualiuxiang
/
node
mirror of https://github.com/nodejs/node.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
node/test/fixtures/deprecated-userland-class.js

16 lines
455 B
JavaScript
Raw Normal View History

util: support classes in util.deprecate() Classes cannot be instantiated without new, but util.deprecate() uses Function.prototype.apply(). This commit uses new.target to detect constructor calls, allowing classes to be deprecated. PR-URL: https://github.com/nodejs/node/pull/7690 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
2016-07-13 05:09:12 +08:00
const util = require('util');
const assert = require('assert');
class deprecatedClass {
}
const deprecated = util.deprecate(deprecatedClass, 'deprecatedClass is deprecated.');
const instance = new deprecated();
util: fix deprecated class prototype Ensure the wrapped class prototype is exactly the unwrapped class prototype, rather than an object whose prototype is the unwrapped class prototype. This ensures that instances of the unwrapped class are instances of the wrapped class. This is useful when both a wrapped class and a factory for the unwrapped class are both exposed. Ref: https://github.com/nodejs/node/pull/8103 PR-URL: https://github.com/nodejs/node/pull/8105 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Evan Lucas <evanlucas@me.com> Reviewed-By: James M Snell <jasnell@gmail.com>
2016-08-15 06:27:40 +08:00
const deprecatedInstance = new deprecatedClass();
util: support classes in util.deprecate() Classes cannot be instantiated without new, but util.deprecate() uses Function.prototype.apply(). This commit uses new.target to detect constructor calls, allowing classes to be deprecated. PR-URL: https://github.com/nodejs/node/pull/7690 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
2016-07-13 05:09:12 +08:00
assert(instance instanceof deprecated);
assert(instance instanceof deprecatedClass);
util: fix deprecated class prototype Ensure the wrapped class prototype is exactly the unwrapped class prototype, rather than an object whose prototype is the unwrapped class prototype. This ensures that instances of the unwrapped class are instances of the wrapped class. This is useful when both a wrapped class and a factory for the unwrapped class are both exposed. Ref: https://github.com/nodejs/node/pull/8103 PR-URL: https://github.com/nodejs/node/pull/8105 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Evan Lucas <evanlucas@me.com> Reviewed-By: James M Snell <jasnell@gmail.com>
2016-08-15 06:27:40 +08:00
assert(deprecatedInstance instanceof deprecated);
assert(deprecatedInstance instanceof deprecatedClass);