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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.subarray
description: Returns a new instance sharing the same buffer
info: |
22.2.3.27 %TypedArray%.prototype.subarray( begin , end )
...
17. Return ? TypedArraySpeciesCreate(O, argumentsList).
includes: [testBigIntTypedArray.js, compareArray.js]
features: [BigInt, TypedArray]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA([40n, 41n, 42n, 43n]);
var buffer = sample.buffer;
var result = sample.subarray(1);
assert.notSameValue(result, sample, "returns a new instance");
assert.sameValue(result.buffer, sample.buffer, "shared buffer");
assert.sameValue(sample.buffer, buffer, "original buffer is preserved");
sample[1] = 100n;
assert(
compareArray(result, [100n, 42n, 43n]),
"changes on the original sample values affect the new instance"
);
result[1] = 111n;
assert(
compareArray(sample, [40n, 100n, 111n, 43n]),
"changes on the new instance values affect the original sample"
);
});
reportCompare(0, 0);
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