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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.find
description: >
Return undefined if predicate always returns a boolean false value.
info: |
22.2.3.10 %TypedArray%.prototype.find (predicate [ , thisArg ] )
%TypedArray%.prototype.find is a distinct function that implements the same
algorithm as Array.prototype.find as defined in 22.1.3.8 except that the this
object's [[ArrayLength]] internal slot is accessed in place of performing a
[[Get]] of "length". The implementation of the algorithm may be optimized with
the knowledge that the this value is an object that has a fixed length and
whose integer indexed properties are not sparse.
...
22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
...
6. Repeat, while k < len
...
c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).
...
7. Return undefined.
includes: [testTypedArray.js]
features: [Symbol, TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
var sample = new TA(3);
var called = 0;
var result = sample.find(function() {
called++;
return false;
});
assert.sameValue(called, 3, "predicate was called three times");
assert.sameValue(result, undefined);
result = sample.find(function() { return ""; });
assert.sameValue(result, undefined, "ToBoolean(empty string)");
result = sample.find(function() { return undefined; });
assert.sameValue(result, undefined, "ToBoolean(undefined)");
result = sample.find(function() { return null; });
assert.sameValue(result, undefined, "ToBoolean(null)");
result = sample.find(function() { return 0; });
assert.sameValue(result, undefined, "ToBoolean(0)");
result = sample.find(function() { return -0; });
assert.sameValue(result, undefined, "ToBoolean(-0)");
result = sample.find(function() { return NaN; });
assert.sameValue(result, undefined, "ToBoolean(NaN)");
});
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