1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 var typedArrayConstructors = [ 6 Uint8Array, 7 Int8Array, 8 Uint16Array, 9 Int16Array, 10 Uint32Array, 11 Int32Array, 12 Uint8ClampedArray, 13 Float32Array, 14 Float64Array 15 ]; 16 17 function assertArrayLikeEquals(value, expected, type) { 18 assertEquals(value.__proto__, type.prototype); 19 // Don't test value.length because we mess with that; 20 // instead in certain callsites we check that length 21 // is set appropriately. 22 for (var i = 0; i < expected.length; ++i) { 23 // Use Object.is to differentiate between +-0 24 assertSame(expected[i], value[i]); 25 } 26 } 27 28 for (var constructor of typedArrayConstructors) { 29 // Test default numerical sorting order 30 var a = new constructor([100, 7, 45]) 31 assertEquals(a.sort(), a); 32 assertArrayLikeEquals(a, [7, 45, 100], constructor); 33 assertEquals(a.length, 3); 34 35 // For arrays of floats, certain handling of +-0/NaN 36 if (constructor === Float32Array || constructor === Float64Array) { 37 var b = new constructor([+0, -0, NaN, -0, NaN, +0]) 38 b.sort(); 39 assertArrayLikeEquals(b, [-0, -0, +0, +0, NaN, NaN], constructor); 40 assertEquals(b.length, 6); 41 } 42 43 // Custom sort--backwards 44 a.sort(function(x, y) { return y - x; }); 45 assertArrayLikeEquals(a, [100, 45, 7], constructor); 46 47 // Basic TypedArray method properties: 48 // Length field is ignored 49 Object.defineProperty(a, 'length', {value: 1}); 50 assertEquals(a.sort(), a); 51 assertArrayLikeEquals(a, [7, 45, 100], constructor); 52 assertEquals(a.length, 1); 53 // Method doesn't work on other objects 54 assertThrows(function() { a.sort.call([]); }, TypeError); 55 } 56
