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36 lines
977 B
JavaScript
36 lines
977 B
JavaScript
// Copyright (C) 2015 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-map-iterable
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description: >
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A Map constructed without a iterable argument does not call set.
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info: |
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Map ( [ iterable ] )
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When the Map function is called with optional argument the following steps are
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taken:
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...
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5. If iterable is not present, let iterable be undefined.
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6. If iterable is either undefined or null, let iter be undefined.
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7. Else,
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a. Let adder be Get(map, "set").
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b. ReturnIfAbrupt(adder).
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c. If IsCallable(adder) is false, throw a TypeError exception.
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d. Let iter be GetIterator(iterable).
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e. ReturnIfAbrupt(iter).
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8. If iter is undefined, return map.
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---*/
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var set = Map.prototype.set;
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var counter = 0;
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Map.prototype.set = function(value) {
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counter++;
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set.call(this, value);
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};
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new Map();
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assert.sameValue(counter, 0, '`Map.prototype.set` was not called.');
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