| // 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: > |
| Predicate may detach the buffer |
| 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 |
| ... |
| b. Let kValue be ? Get(O, Pk). |
| c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)). |
| ... |
| |
| 9.4.5.8 IntegerIndexedElementGet ( O, index ) |
| |
| ... |
| 3. Let buffer be the value of O's [[ViewedArrayBuffer]] internal slot. |
| 4. If IsDetachedBuffer(buffer) is true, throw a TypeError exception. |
| ... |
| includes: [testTypedArray.js, detachArrayBuffer.js] |
| features: [TypedArray] |
| ---*/ |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var sample = new TA(2); |
| var loops = 0; |
| var completion = false; |
| |
| assert.throws(TypeError, function() { |
| sample.findIndex(function() { |
| loops++; |
| $DETACHBUFFER(sample.buffer); |
| completion = true; |
| }); |
| }, "throws a TypeError getting a value from the detached buffer"); |
| |
| assert.sameValue(loops, 1, "predicated is called once"); |
| assert(completion, "abrupt completion does not come from DETACHBUFFER"); |
| }); |