72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
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// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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(function testFunctionNames() {
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let descriptor = {
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value: '',
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writable: false,
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enumerable: false,
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configurable: true
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};
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// Functions have a "name" property by default.
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assertEquals(
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descriptor, Object.getOwnPropertyDescriptor(function(){}, 'name'));
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let a = { fn: function(){} };
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assertSame('fn', a.fn.name);
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descriptor.value = 'fn';
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assertEquals(descriptor, Object.getOwnPropertyDescriptor(a.fn, 'name'));
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let b = { __proto__: function(){} };
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assertSame('', b.__proto__.name);
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descriptor.value = '';
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assertEquals(
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descriptor, Object.getOwnPropertyDescriptor(b.__proto__, 'name'));
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let c = { fn: function F(){} };
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assertSame('F', c.fn.name);
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descriptor.value = 'F';
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assertEquals(descriptor, Object.getOwnPropertyDescriptor(c.fn, 'name'));
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let d = { __proto__: function E(){} };
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assertSame('E', d.__proto__.name);
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descriptor.value = 'E';
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assertEquals(
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descriptor, Object.getOwnPropertyDescriptor(d.__proto__, 'name'));
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})();
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(function testClassNames() {
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let descriptor = {
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value: '',
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writable: false,
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enumerable: false,
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configurable: true
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};
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// Anonymous classes do not have a "name" property by default.
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assertSame(undefined, Object.getOwnPropertyDescriptor(class {}, 'name'));
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descriptor.value = 'C';
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assertEquals(descriptor, Object.getOwnPropertyDescriptor(class C {}, 'name'));
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let a = { fn: class {} };
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assertSame('fn', a.fn.name);
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descriptor.value = 'fn';
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assertEquals(descriptor, Object.getOwnPropertyDescriptor(a.fn, 'name'));
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let b = { __proto__: class {} };
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assertSame('', b.__proto__.name);
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assertSame(
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undefined, Object.getOwnPropertyDescriptor(b.__proto__, 'name'));
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let c = { fn: class F {} };
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assertSame('F', c.fn.name);
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descriptor.value = 'F';
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assertEquals(descriptor, Object.getOwnPropertyDescriptor(c.fn, 'name'));
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let d = { __proto__: class F {} };
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assertSame('F', d.__proto__.name);
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descriptor.value = 'F';
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assertEquals(
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descriptor, Object.getOwnPropertyDescriptor(d.__proto__, 'name'));
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})();
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