| // 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.findindex |
| description: > |
| Change values during predicate call |
| info: | |
| 22.2.3.11 %TypedArray%.prototype.findIndex ( predicate [ , thisArg ] ) |
| |
| %TypedArray%.prototype.findIndex is a distinct function that implements the |
| same algorithm as Array.prototype.findIndex as defined in 22.1.3.9 except that |
| the this object's [[ArrayLength]] internal slot is accessed in place of |
| performing a [[Get]] of "length". |
| |
| ... |
| |
| 22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] ) |
| |
| ... |
| 6. Repeat, while k < len |
| ... |
| c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)). |
| ... |
| includes: [compareArray.js, testTypedArray.js] |
| features: [TypedArray] |
| ---*/ |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var arr = [10, 20, 30]; |
| var sample; |
| var result; |
| |
| sample = new TA(3); |
| sample.findIndex(function(val, i) { |
| sample[i] = arr[i]; |
| |
| assert.sameValue(val, 0, "value is not mapped to instance"); |
| }); |
| assert(compareArray(sample, arr), "values set during each predicate call"); |
| |
| sample = new TA(arr); |
| result = sample.findIndex(function(val, i) { |
| if ( i === 0 ) { |
| sample[2] = 7; |
| } |
| return val === 7; |
| }); |
| assert.sameValue(result, 2, "value found"); |
| |
| sample = new TA(arr); |
| result = sample.findIndex(function(val, i) { |
| if ( i === 0 ) { |
| sample[2] = 7; |
| } |
| return val === 30; |
| }); |
| assert.sameValue(result, -1, "value not found"); |
| |
| sample = new TA(arr); |
| result = sample.findIndex(function(val, i) { |
| if ( i > 0 ) { |
| sample[0] = 7; |
| } |
| return val === 7; |
| }); |
| assert.sameValue(result, -1, "value not found - changed after call"); |
| }); |