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// Copyright (C) 2021 Microsoft. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.findlastindex
description: >
Return -1 if predicate always returns a boolean false value.
info: |
%TypedArray%.prototype.findLastIndex ( predicate [ , thisArg ] )
...
5. Let k be len - 1.
6. Repeat, while k ≥ 0
...
c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
...
7. Return -1𝔽.
includes: [testBigIntTypedArray.js]
features: [BigInt, TypedArray, array-find-from-last]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA([1n, 2n, 3n]);
var called = 0;
var result = sample.findLastIndex(function() {
called++;
return false;
});
assert.sameValue(called, 3, "predicate was called three times");
assert.sameValue(result, -1, "result is -1 when predicate returns are false");
result = sample.findLastIndex(function() { return ""; });
assert.sameValue(result, -1, "ToBoolean(string)");
result = sample.findLastIndex(function() { return undefined; });
assert.sameValue(result, -1, "ToBoolean(undefined)");
result = sample.findLastIndex(function() { return null; });
assert.sameValue(result, -1, "ToBoolean(null)");
result = sample.findLastIndex(function() { return 0; });
assert.sameValue(result, -1, "ToBoolean(0)");
result = sample.findLastIndex(function() { return -0; });
assert.sameValue(result, -1, "ToBoolean(-0)");
result = sample.findLastIndex(function() { return NaN; });
assert.sameValue(result, -1, "ToBoolean(NaN)");
});
reportCompare(0, 0);
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