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48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-runtime-semantics-classdefinitionevaluation
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es6id: 14.5.14
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description: >
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Observable iteration of arguments during execution of "inferred" constructor
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info: |
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[...]
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10. If constructor is empty, then
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a. If ClassHeritageopt is present and superclass is not null, then
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i. Let constructor be the result of parsing the source text
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constructor(... args){ super (...args);}
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using the syntactic grammar with the goal symbol MethodDefinition[~Yield].
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features: [Symbol.iterator]
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---*/
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var otherIterator = ['fifth', 'sixth', 'seventh'][Symbol.iterator]();
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var spread, parentArgs;
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function Parent() {
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parentArgs = arguments;
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}
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class C extends Parent {}
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Array.prototype[Symbol.iterator] = function() {
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spread = this;
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return otherIterator;
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};
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new C('first', 'second', 'third', 'fourth');
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assert.sameValue(Object.getPrototypeOf(spread), Array.prototype);
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assert.sameValue(spread.length, 4);
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assert.sameValue(spread[0], 'first');
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assert.sameValue(spread[1], 'second');
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assert.sameValue(spread[2], 'third');
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assert.sameValue(spread[3], 'fourth');
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assert.sameValue(
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typeof parentArgs, 'object', 'parent arguments object'
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);
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assert.sameValue(parentArgs.length, 3);
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assert.sameValue(parentArgs[0], 'fifth');
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assert.sameValue(parentArgs[1], 'sixth');
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assert.sameValue(parentArgs[2], 'seventh');
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