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29 lines
1.1 KiB
JavaScript
29 lines
1.1 KiB
JavaScript
// Copyright 2015 Microsoft Corporation. All rights reserved.
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// This code is governed by the license found in the LICENSE file.
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/*---
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description: Source array with boundary values
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esid: sec-array.from
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es6id: 22.1.2.1
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---*/
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var array = [Number.MAX_VALUE, Number.MIN_VALUE, Number.NaN, Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY];
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var arrayIndex = -1;
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function mapFn(value, index) {
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this.arrayIndex++;
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assert.sameValue(value, array[this.arrayIndex], "Value mismatch in mapFn at index " + index + ".");
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assert.sameValue(index, this.arrayIndex, "Index mismatch in mapFn.");
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return value;
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}
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var a = Array.from(array, mapFn, this);
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assert.sameValue(a.length, array.length, "Length mismatch.");
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assert.sameValue(a[0], Number.MAX_VALUE, "Element mismatch for mapped array at index 0.");
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assert.sameValue(a[1], Number.MIN_VALUE, "Element mismatch for mapped array at index 1.");
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assert.sameValue(a[2], Number.NaN, "Element mismatch for mapped array at index 2.");
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assert.sameValue(a[3], Number.NEGATIVE_INFINITY, "Element mismatch for mapped array at index 3.");
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assert.sameValue(a[4], Number.POSITIVE_INFINITY, "Element mismatch for mapped array at index 4.");
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