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// Copyright (C) 2018 Richard Lawrence. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.flatMap
description: >
properties are accessed correct number of times by .flatMap
info: |
Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
...
6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, 1, mapperFunction, T).
FlattenIntoArray (target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
3. Repeat, while sourceIndex < sourceLen
a. Let P be ! ToString(sourceIndex).
b. Let exists be ? HasProperty(source, P).
c. If exists is true, then
i. Let element be ? Get(source, P).
features: [Array.prototype.flatMap]
includes: [compareArray.js]
---*/
assert.sameValue(
typeof Array.prototype.flatMap,
'function',
'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
);
const getCalls = [], hasCalls = [];
const handler = {
get : function (t, p, r) { getCalls.push(p); return Reflect.get(t, p, r); },
has : function (t, p, r) { hasCalls.push(p); return Reflect.has(t, p, r); }
}
const tier2 = new Proxy([4, 3], handler);
const tier1 = new Proxy([2, [3, 4, 2, 2], 5, tier2, 6], handler);
Array.prototype.flatMap.call(tier1, function(a){ return a; });
assert.compareArray(getCalls, ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"], 'The value of getCalls is expected to be ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"]');
assert.compareArray(hasCalls, ["0", "1", "2", "3", "0", "1", "4"], 'The value of hasCalls is expected to be ["0", "1", "2", "3", "0", "1", "4"]');
reportCompare(0, 0);
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